Relevant bibliographies by topics / Provenance variations

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Academic literature on the topic 'Provenance variations'

Author: Grafiati
Published: 19 February 2023

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Journal articles on the topic "Provenance variations"

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Bogunović, Sanja, Saša Bogdan, Miran Lanšćak, Nevenka Ćelepirović, and Mladen Ivanković. "Use of a Common Garden Experiment in Selecting Adapted Beech Provenances for Artificial Stand Restoration." South-east European forestry 11, no. 1 (April 30, 2020): 1–10. http://dx.doi.org/10.15177/seefor.20-07.

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Increased frequency of extreme weather events has seriously affected forestry operations in south-eastern Europe. A precondition for effective artificial restoration of disturbed forest stands is site-adapted forest reproductive material (FRM). Common garden experiments (provenance trials) may assist in selecting such FRM. The main objective of this study was to establish among-provenance variation pattern using data from a beech provenance trial. Usefulness of the results in selecting seed sources for restoration of European beech stands is discussed. The trial was set up in 2007, at a slope of Medvednica mount facing north-west at 730-750 m above sea level. Plant heights were measured and survival scored in 2008 and 2015. Height increments were calculated and processed to determine variance components due to various effects. Highly significant provenance-by-block interaction was revealed, indicating strong microsite effects on provenance performances. Therefore, corrections were made and provenance mean height increments recalculated. Provenance mean height increment multiplied with survival was used as a measure of a provenance’s adaptedness. Regression tree (RT) analysis was used to determine the pattern of among-provenance variations. A set of provenance clus­ters was grown using climatic variables related to the provenance stands of origin as criteria. All analyzed effects were significant (provenance: F=2.07, p<0.05; block: F=5.07, p<0.05; provenance by block interaction: F=7.32, p<0.001). Data corrections reduced the interaction effect, thereby increasing reliability of calculated provenance adaptedness indices (AI). Provenances were grouped into 4 clusters due to elevation, mean July temperature and summer heat-to-moisture index (SHM). Cluster 4, containing provenances from the highest altitudes (>750m), had the highest mean AI (143.9±8.4 cm). The lowest mean AI (106.7±14.8 cm) had cluster 1, containing provenances from lower altitudes with lower mean July temperatures (≤18.4°C). Provenances originating from lower elevations with higher mean July temperatures (>18.4°C) were further divided into two clusters due to the SHM variable. Cluster 2 had the second highest mean AI (141.2±1.5 cm) and contained provenances from relatively wetter habitats (SHM≤48.2). Cluster 3, containing provenances from relatively arid habitats (SHM>48.2), had significantly lower mean AI (116.8±8.6 cm). Established among-provenance variation pattern might be used as a tool in selecting seed sources for artificial restoration of beech stands at mount Medvednica. It is advisable to use FRM from higher altitudes and/or from slightly lower altitudes (up to 150 m lower than a restoring site) but featured with warmer and drier conditions compared to the trial. Generally, provenance trials should be utilized as a valuable decision tool in restoring disturbed forest stands but may also be misleading if not well designed and analyzed.
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Klisz, Marcin, Valentina Buttò, Sergio Rossi, Hubert Morin, and Szymon Jastrzębowski. "Intra-annual stem size variations converge across marginal populations of European beech." Trees 34, no. 1 (October 1, 2019): 255–65. http://dx.doi.org/10.1007/s00468-019-01915-5.

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Abstract Key message The intra-annual variability in stem size of marginal beech population from south-eastern distribution range of beech in Poland is higher within than between populations. Abstract One of the key issues of the distribution of tree species is their ability to track environmental changes. European beech (Fagus sylvatica L.) is a species highly sensitive to extreme climatic events, because of its high phenotypic plasticity. In this study, we aim to determine the variability in stem size between and within marginal beech populations. Marginal populations of beech growing under uniform environmental conditions of provenance trial offer unique opportunity to detect adaptive differentiations driven by natural selection. In this work, we studied stem size variation recorded by automatic band dendrometers in four beech marginal populations growing in a common garden in the south-eastern distribution range of beech in Poland over the period 2016–2018. Strong climatic effects and weak provenance differences in seasonal stem size variation were observed. The provenances exhibited similar climate-related seasonal stem circumference variation. A high within-provenance variation was confirmed. Temperature of spring as well as temperature and precipitation of autumn were detected as key climatic parameters mostly for onset and end of stem size variation. Maximum stem size was mostly affected by the later end of its variation, which positively affected its duration. Climatic distance between beech provenances and provenance trial had a negligible effect on the variability in seasonal stem size variation between provenances. The evidence of weak inter-provenance and high intra-provenance variation in stem size changes observed in the south-eastern distribution range indicates that an individual-based approach could be a suitable strategy, when selecting for phenotypic plasticity.
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Stojnic, Srdjan, Sasa Orlovic, Danijela Miljkovic, and Wuehlisch von. "Intra- and interprovenance variations in leaf morphometric traits in European beech (Fagus sylvatica L.)." Archives of Biological Sciences 68, no. 4 (2016): 781–88. http://dx.doi.org/10.2298/abs151008064s.

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European beech (Fagus sylvatica L.) is one of the most important tree species in Europe. Due to substantial genetic diversity and phenotypic plasticity, beech has successfully adapted to different environments within its natural range. Provenance tests provide a good basis for studying within- and between-provenance genetic variation, due to homogeneous within-trial environmental conditions. The aim of the present study was to determine the within- and between-provenance genetic variability of certain leaf morphological traits among eleven beech provenances, grown in a common garden experiment. Univariate analysis of variance (ANOVA) was used to test for differences among the studied beech provenances. Principal component analysis (PCA) allowed a complex assessment of the relationships among the provenances and an estimation of multivariate relations among the analyzed characters. The results of the study revealed the existence of substantial variability among provenances (p<0.001). Likewise, high genetic variability was observed at the intra-provenance level (p<0.001). The first three principal components (PC1-PC3) explained approximately 81% of the total variance among the European beech provenances tested. The highest contribution on PC1 corresponded to variables related to leaf size: leaf area (-0.882) and leaf width (-0.876). Based on the position of provenances on a PCA scatter plot, it could be assumed that European beech is characterized by a more ecotypic pattern of genetic variation rather than by clinal variation. Also, the presence of considerable genetic diversity within provenances will be important in the light of climate change impact on beech, since it could potentially facilitate rapid adaptation.
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Višnjić, Ćemal, Besim Balić, Velid Halilović, and Fuad Šehić. "VARIATION IN GROWTH AMONG NINE BOSNIAN HERZEGOVINIAN PROVENANCES OF SILVER FIR (Abies alba Mill)." Radovi Šumarskog fakulteta Univerziteta u Sarajevu 49, no. 1 (November 1, 2021): 1–19. http://dx.doi.org/10.54652/rsf.2019.v49.i1.21.

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UDK: 630*232:582.475(497.6) Provenance experiments with forest trees provide valuable information about the growth and adaptability of population, often transferred from remote geographical regions and various climate conditions. This study researches the growth of nine provenances of silver fir from the area of its natural distribution in Bosnia and Herzegovina. The experiment was established in the year 1991 in the form of a random block system with 5 repetitions. For planting, we used five-year-old seedlings (2/3), and planting spacing was 2x2 m. Each Silver fir provenance was included with 320 plants. Measurement results in the 28th year of age show the existence of variations between silver fir provenances in characteristics; mean height, mean diameter and average tree volume. Silver fir provenance from Bosanski Petrovac showed the best results. The mean height of this Silver fir provenance at the age of 28 was 9.1 m, while the mean diameter was 11.9 cm. Provenances that show the lowest growth (8.1 m) were from Pale, Olovo-Klis and Konjic. Silver fir provenance from Konjic has the lowest mean diameter (10.7 cm). In all provenances, we have had a culmination of height increment in age between 20 and 25 years. Variation between tested silver fir provenances for examined characteristic “mean height” was larger (four groups of population) compared to examined characteristic “mean diameter” (two groups of population). Volume of mean tree (0.062m3) and assortment (111.33 m3/ha) in Bosanski Petrovac provenance was larger than spreadsheet values for the first yield class for Central Europe conditions. The trial shows that silver fir in Bosnia and Herzegovina is variable on the local level due to specific micro-habitual conditions in which it grows.
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Bahru, Tinsae, Berhane Kidane, and Yigardu Mulatu. "Provenance Variation on Early Survival Rate and Growth Performance ofOxytenanthera abyssinica(A. Rich.) Munro Seedlings at Green House: An Indigenous Lowland Bamboo Species in Ethiopia." International Journal of Forestry Research 2018 (December 9, 2018): 1–12. http://dx.doi.org/10.1155/2018/5713456.

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Background. Lowland Bamboo (O. abyssinica) is an indigenous multipurpose species in Ethiopia and endemic to Africa.Aims. The present study was aimed at investigating provenance variation on early survival rate and growth performance ofO. abyssinicaseedlings so as to obtain suitable provenance for production of high quality seedlings.Methods. Seeds were collected from Pawe and Sherkole districts. Following raise of seedlings data on survival count, culm height, root collar diameter (RCD), number of leaves, and biomass were recorded.Results. Pawe provenance had slightly higher survival rate (91%). Except seedlings RCD, rhizomes length, and roots fresh and dry weights, higher mean values of other morphological parameters were recorded in Sherkole provenance. Biomass of leaves and culms was higher in Shekole provenance, while root biomass was exceeded by the Pawe provenance. However, significant variations (P<0.05) between provenances were observed in RCD, rhizomes length, weight of fresh culms, and fresh and dry root system. Seedlings growth parameters (height and RCD) were positively and significantly correlated with Biomass variables and hence could be considered as better evaluation criteria for seedling quality at green house.Conclusion. Sherkole provenance should be considered for raisingO. abyssinicaseedlings at green house.
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Gilfedder, L., and JB Kirkpatrick. "Genecological Variation in the Germination, Growth and Morphology of Four Populations of a Tasmanian Endangered Perennial Daisy, Leucochrysum albicans." Australian Journal of Botany 42, no. 4 (1994): 431. http://dx.doi.org/10.1071/bt9940431.

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Seed was obtained from four populations of an endangered perennial daisy, Leucochrysum albicans (syn. Helipterum albicans), in Tasmania. These populations were from montane basaltic soils, montane limestone soils, lowland basaltic soils and lowland soils derived from mudstone. All populations had their highest percentage germination at 20°c, but the montane populations had lower germination rates than the lowland populations, especially at lower temperatures. The low altitude populations exhibited more rapid germination than the high altitude populations. In a glasshouse experiment droughting decreased the growth of the provenances from limestone and mudstone, while having little effect on the basalt provenances, mulching increased the growth of the lowland provenances relative to the highland provenances, and the application of fertiliser depressed the growth of the montane basalt provenance. Variations in leaf characteristics and flowering rates were evident between either provenance or treatment. The marked geographic variation in germination, morphology and ecological responses indicates that it is important to maintain the species over its full environmental range.
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Tsegaye, Mintesnot, Belayneh Lemage, and Alemayehu Hido. "Seedling performance of different provenances of selected indigenous tree species in Debub Ari District, Southern Ethiopia." Global Journal of Earth and Environmental Science 6, no. 2 (April 30, 2021): 38–43. http://dx.doi.org/10.31248/gjees2020.086.

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Better understanding of variations in seed traits and seedling vigor in various populations of a given species is vital for appropriate nursery and tree planting technology. The main objective of this study was to identify better provenance for indigenous trees by testing seed germination and seedling traits. Seeds of six indigenous trees (Vachellia abyssinica, Vachellia seyal, Faidherbia albida, Balanites aegyptiaca and Terminalia laxiflora Engl.) were collected from different geographic areas. One hundred (100) polyethylene pots (20 cm height and 12 cm diameter) were filled with 2:1:1 ratio of local, forest soil and sand composition for seedlings. A Complete Randomized Design (CRD), 5 x 4 polyethylene pots in four replications of 20 polyethylene pots for each provenance was designed in the nursery and the provenances for selected species. Different early growth performance parameters were measured for each tested provenance. All collected data were analyzed by using ANOVA while the least significance difference was computed for mean separation. The seedling performance of Vachellia abyssinica and Vachellia seyal were significantly varied among the provenances. Vachellia abyssinica from Butajira provenance had the highest mean values across all the studied parameters. Except height, Kako provenance had the highest mean values across all the early performance parameters of Vachellia seyal. Seedling performances of Faidherbia albida in the nursery was significantly varied among the provenances except for root collar diameter. Provenance from Wondo Genet had the highest mean values of germination percent and comparable leaf numbers with provenance from Hawassa. It can be concluded that the observed patterns of variation will have the implication for genetic resources conservations and tree improvement. Accordingly, Butajira and Kako provenances could be taken as a good source of seed collection for Vachellia abyssinica and Vachellia seyal, respectively. Wondo Genet and Hawassa provenances could also ensure the provision of planting materials of Faidherbia albida for farmers. Further progeny tests in the field should be undertaken for a longer period to obtain definitive recommendations for early selection
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Gülcü, Süleyman, and Nebi Bilir. "Growth and Survival Variation among Scots Pine (Pinus sylvestrisL.) Provenances." International Journal of Genomics 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/1904623.

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Tree height, basal diameter, and survival were examined in thirteen-year-old provenance test established by 30 seed sources of Scots pine (Pinus sylvestrisL.) at two exotic sites of the species in Southern part of Turkey. Variations within provenance and among provenances and relations among the traits were estimated to compare Scots pine provenance and two other native species. Averages of tree height and basal diameter were 350 cm and 52.7 mm in Aydogmus site and 385 cm and 51.2 mm in Kemer site, respectively. There were large differences within and among provenances for the characters. Sites were similar (p>0.05) for the characters, while there were significant differences (p≤0.05) among provenances within site according to results of variance analysis (ANOVA). Scots pine provenances were higher and had more thickness than that of black pine (Pinus nigraArnold) and Taurus cedar (Cedrus libaniA. Rich.) which were natural species of the region. There were positive and significant (p<0.05) correlations between height and basal diameter in the species. Average survivals were 56% and 35% of the provenances in the sites. They were 71% and 11% in black pine and 53% in Taurus cedar for the sites respectively.
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Wu, Pengfei, Mulualem Tigabu, Xiangqing Ma, Per Christer Odén, Youlan He, Xintuo Yu, and Zhiying He. "Variations in biomass, nutrient contents and nutrient use efficiency among Chinese fir provenances." Silvae Genetica 60, no. 1-6 (December 1, 2011): 95–105. http://dx.doi.org/10.1515/sg-2011-0014.

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Abstract A provenance trial involving 16 Chinese fir provenances was established in southern China in 1979, and biomass, nutrient content and nutrient use efficiency were assessed at the age of 23. One-way analysis of variance revealed significant inter-provenance variation (p<0.0001) in measured variables. The mean total biomass ranged from 98.8±5.3 to 163.3±4.2 t ha−1, and the stemwood accounted for 47–65% of the total biomass, followed by roots (11–24%), stembark (7.4–13.7%), and needles and branches (< 10 %). Much of the nitrogen, phosphorus and potassium were stored in the needles, although the concentration varies among provenances. Whole-tree nutrient use efficiency varied from 115.4±2.1 to 180.2±1.02 g g−1, while efficiency in stemwood production ranged from 53.9±3.1 to 106.3±1.1 g g−1. Provenances did not display consistent variation in all measured variables, suggesting the need for multiple criteria for selection in future tree improvement program. In conclusion, the study reveals the existence of considerable variation in biomass production and nutrient use efficiency among Chinese fir provenances that can be exploited for selecting desirable genotypes for enhancing productivity of Chinese fir plantations.
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Nguyen-Queyrens, Anne, André Ferhi, Denis Loustau, and Jean-Marc Guehl. "Within-ring δ13C spatial variability and interannual variations in wood cellulose of two contrasting provenances of Pinus pinaster." Canadian Journal of Forest Research 28, no. 5 (May 1, 1998): 766–73. http://dx.doi.org/10.1139/x98-044.

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The carbon isotope composition (δ13C) of cellulose extracted from wood samples was measured on 26-year-old maritime pine trees (Pinus pinaster Ait.) of the mesic French provenance Landes and of the drought-resistant Moroccan provenance Tamjoute, all growing at the same location in France. Analysis of spatial variability revealed that intra-ring δ13C values varied over a range of about 0.5%o (mean SD = 0.12%o) for circumference and of about 1%o (mean SD = 0.22%o) for height and that interannual variability of δ13C was 3%o. The successive year-to-year δ13C values on four trees (from 1972 to 1991) were found to roughly parallel the variations of a water stress index, calculated by taking into account climatic variables as well as the level of the water table in the soil: δ13C increased with drought. The two provenances (30 trees per provenance) were compared at a juvenile stage (old rings) and at a mature stage (recent rings). The drought-resistant provenance (Tamjoute) presented lower δ13C values, independent of ring age. Relationships between δ13C and tree height are discussed both at the within- and between-provenance levels.
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Dissertations / Theses on the topic "Provenance variations"

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Hemery, Gabriel E. "Juglans regia L : genetic variation and provenance performance." Thesis, University of Oxford, 2000. http://ora.ox.ac.uk/objects/uuid:160d3486-f71c-4575-84e7-85dc64b3222f.

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A range-wide collection of Juglans regia seeds was undertaken in autumn 1997 from 12 countries, including 25 provenances and 375 half-sib progenies. 2200 seedlings were produced using innovative nursery techniques. The seedlings were planted in three provenance trials in southern England in 1999, the largest of which acted as a combined provenance/progeny trial. After one growing season, survival was 98.9 %, mean height growth 35 cm, and mean stem diameter increment 5 mm. Provenance differences for both height and stem diameter increment were highly significant (p<0.001). There were no significant genotype × environment interactions. Flushing assessments revealed few significant differences between provenances and flushing was complete by early April. Family heritability for tree height was 0.19 at one site and, with combined selection, genetic gain was estimated at 8 %. The effects of three types of treeshelter and a stumping treatment on walnut establishment were tested over three growing seasons. Treeshelters were found beneficial to height increment. However, 120 cm tall shelters promoted early flushing, and consequent risk of increased frost damage, and caused more stem die-back than 75 cm shelters. Stumping promoted rapid early height increment but gave no longer-term benefit. The crown (cd) and stem (dbh) diameter at breast height relationship of open growing trees in Britain was assessed and was highly significant (r2 = 0.96, p<0.001). The regression equation (cd = 2.71 + 17.6dbh) permitted the estimation of suitable planting densities for the provenance trials and the calculation of a thinning regime. Isozyme analysis of the 375 genotypes identified 20 loci in 15 enzyme systems with seed embryo extracts. Using young leaf extracts, the polymorphic locus Pgm-1 indicated low expected heterozygosity of 0.06 both within populations and at the species level. FST and GST estimates, both 0.05, indicated high uniformity among populations. Genetic distance estimates did not identify significant clustering consistent with geographic origin.
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Ndeze, Michel. "Provenance variation in Maesopsis eminii Engl." Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297671.

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Moura, V. P. G. "Provenance variation of Eucalyptus camaldulensis Dehnh. in Brazil." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371566.

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Dia, Aline. "Sediments et evolution geochimique (evolution de la croute continentale et etude de la limite cretace-tertiaire) : contraintes apportees par l'analyse isotopique (neodyme et plomb) et les teneurs en elements traces." Paris 7, 1988. http://www.theses.fr/1988PA077050.

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L'utilisation d'analyses isotopiques (nd et pb) et des teneurs en elements-trace a permis d'aborder plusieurs aspects de la geochimie des roches sedimentaires. On s'interesse a l'aspect temporel enregistre par les sediments avec la caracterisation de la croissance de la croute continentale et l'etude de son evolution chimique au cours du temps (afrique du sud et canada). L'autre aspect etudie concerne l'individualisation des contributions respectives des sources de particules sedimentaires (etude isotopique de la limite cretace-tertiaire, evolution geochimique du bassin oceanique marocain), les concentrations secondaires ou les phenomenes de circulation
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Sagaram, Madhulika. "Variation in ecogeographical traits of pecan cultivars and provenances." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1579.

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Ferreira, Inês Lima Correia Amorim. "Contribution to the knowledge of provenance effect on cork oak (Quercus suber L.) performance within the scope of the Reinfforce Project." Master's thesis, ISA/UL, 2018. http://hdl.handle.net/10400.5/17815.

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Mestrado em Gestão e Conservação dos Recursos Naturais - Instituto Superior de Agronomia / Universidade de Évora
Cork oak (Quercus suber L.) is distributed in the western part of the Mediterranean Basin, occurring across a wide range of environmental conditions and thus, it has the potential to exhibit a larger intraspecific variation in morphological and functional traits. Significant differences among populations of cork oak have been reported for several traits related to acorn size, growth, and functional traits related to leaf pest damage resistance, drought and cold tolerance. The central purpose of this study was to investigate the inter-provenance variability of cork oak in 4-year-old seedlings. This study was carried out at the arboretum of Tapada da Ajuda (planted in 2012) located in Lisbon, Portugal; between January and July 2016. This is within of the Reinfforce’s arboreta network, which aims to address the adaptability of forest species in the European Atlantic region to climate change. The variation in budburst timing, growth, morphological and physiological traits was compared for six contrasting cork oak provenances from the natural distribution area of the species. Regarding timing of budburst, Italian and French (Pyrenees) provenances from the eastern part of the natural range tended to burst earlier than French provenance (Landes) from the western part. Regarding growth, Spanish provenance exhibited one of the lowest total height and Moroccan exhibited one of the lowest basal diameter. Moroccan exhibited one of the lowest height growth during the study period. Both provenances above mentioned exhibited lower increases in basal diameter. Regarding leaf morphology, Moroccan exhibited one of the highest leaf size and specific leaf area. Regarding physiological traits, Moroccan consistently revealed one of the lowest relative and absolute foliar chlorophyll (Chl) content as well as Chl a/b ratio. Seedlings did not exhibit damage at the photosystem II level in January, suggesting that cold-induced photoinhibition of PSII during winter did not occur in this study. All seedlings exhibited signs of photosynthetic decline in mid-March. The Fv/Fm ratio was a good indicator of leaf senescence. The results of the simulation tests of late spring frost were inconclusive. However, Spanish and Italian provenances exhibited low leaf cell membrane injury, determined by relative electrolyte leakage, suggesting lower freezing sensibility. The existence of significant differences among provenances reveals the possibility of selection at the provenance level for (re)forestation actions
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Akhter, Shaheen. "The provenance variation in natural durability of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)." Thesis, Bangor University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367387.

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Wright, Jeffery Alan. "Provenance variation in wood characteristics of Pinus caribaea Morelet and P. oocarpa Scheide." Thesis, University of Oxford, 1987. http://ora.ox.ac.uk/objects/uuid:b5f95b58-5a9c-41c2-b058-89c3614740d2.

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Densitometric, volumetric and paper-making traits of provenances of Pinus caribaea Morelet, P. oocarpa Schiede and P. patula SchiedeariclDeppe ssp. tecunumanii (Eguiluz and Perry) Styles were evaluated. Provenance mean values of densitometric density (DEN) and within tree density variation (VAR) were significantly different (p<0.05) at seven of the fourteen P.caribaea and at one of the seven of P. oocarpa and P. patula ssp. tecunumanii trials. Provenance mean valuesor volume under bark (VUB)and dry matter index (DMI) were significantly (p<0.05) different at all of the P. caribaea and at five of the P. oocarpa and P. patula ssp. tecunumanii trials. The inland provenances of P. caribaea were generally Higher for DEN and VAR than the coastal provenances, he Camelias, Mountain Pine Ridge, Rafael and Yucul provenances of P. patula ssp. tecunumanii were superior to P. oocarpa provenances for VUB and DMI in all of these trials and were superior to P. caribaea at two sites where the species were growing under similar conditions. Evaluation of densitometric races revealed large differences between species, provenances and sites for the width and density of latewood; this could explain much of the variation in VAR between these sources. The analysis of variance was used to assess genotype by environment interaction of DEN and VAR from eleven provenances of P. caribaea var. hondurensis Barrett and Golfari at eleven sites and from five provenances of P. oocarpa and four provenances of P. patula ssp. tecunumanii at sfx sites. Sites and provenances were significantly different for DEN and VAR in both series of trials out the site by provenance term was not statistically significant in either. Indications were that P. caribaea would be expected to have lower values of DEN and VAR at higher altitude. Provenances of P. oocarpa and P. patula ssp. tecunumanii were lower for VAR at sites of lower latitude but there were no individual site factors which could be correlated with DEN in these provenances. The comparison of full-scale pulping with micropulping of small wood samples from felled trees of six pine species in the Eastern Transvaal, South Africa, revealed positive and significant correlations for the pulp yield and paper strength traits. The correlation of tear index and VAR in these trees was positive and significant. Evaluation and analyses of a number of pine species and provenances by micropulping of cores from standing trees revealed significant differences for certain of the paper strength traits. The Caftas provenance of P. oocarpa was unusual in having high values for both tear index and burst index when grown in Zululand. Similar conclusions were reached for provenances of P. patula ssp. tecunumanii grown in the Eastern Transvaal. The conclusions of this thesis were: 1. Site climatic factors did not affect DEN and VAR of the different species and provenances in the same way; 2. The VAR term varied as a result of site, species and provenance; 3. There was no genotype by environment interaction for DEN«*rJ VAR; 4. The correlation of VAR with pulp and paper-making traits indicated that trees with high VAR were superior for tear index to trees with low VAR; 5. Micropulping of small wood samples could be used to assess the paper-making traits of individual trees.
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Belonger, Paul J. "VARIATION IN SELECTED JUVENILE WOOD PROPERTIESIN FOUR SOUTHERN PROVENANCES OF LOBLOLLY PINE." NCSU, 1998. http://www.lib.ncsu.edu/theses/available/etd-19981027-102102.

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BELONGER, PAUL JAMES. Variation of selected juvenile wood properties in four southern provenances of loblolly pine. (Under the direction of Steven E. McKeand.)Gravimetric wood density, x-ray densitometry, and latewood tracheids were used to investigate the relative importance of genetic and environmental effects on various assessments of wood density, tracheid characteristics, and growth traits in loblolly pine (Pinus taeda L.). Breast-height wood samples were taken from four 12-year-old plantings of a genetics trial that included approximately 50 open-pollinated families of loblolly pine from diverse sources. The densitometry and tracheid analysis included wood samples from only two of the test sites and assessed variation in 51 families, and 38 families, respectively. Moderate provenance differences, but strong family and environmental differences were found for wood density and volume, and the pooled genetic correlation between volume and density was -0.30. The Atlantic Coastal and Lower Gulf sources had higher average wood density than the Marion County and Gulf Hammock sources, and the Lower Gulf source had the lowest stem volume. Provenance variation in wood density was not consistent with geographic trends indicating a need for field testing in the area of intended deployment. Location effects were very important and sites which promoted high volume production also appeared to cause low wood density. Strategies are available to combat the unfavorable negative environmental correlation (-0.91, P < 0.01) between stem volume and wood density. Provenance variation was important for disk densities of early ring segments, but diminished with age and was not significant (P > 0.10) beyond the segment consisting of rings 3-6. Pooled narrow-sense heritability estimates for the consecutive-ring group disk densities ranged from 0.142 to 0.225, and all groups were highly correlated with average (tree) disk density (rA > 0.90). Mean latewood density and mean latewood percent both showed a strong positive genetic correlation with average disk density and the disk density of the ring 3-5 segment. Early selection for disk density can be effective.The transition to "mature" wood occurred at ring number 5.9 at the flatwoods location with higher wood density and ring number 8.9 at the upland test site with lower density. The point of transition also showed a strong provenance component (P < 0.05); the higher density Atlantic Coastal and Lower Gulf Coastal Plain sources transitioned sooner than the lower density Gulf Hammock and Marion County sources. Trachied length, total diameter, lumen diameter, and cell wall thickness were measured using outer-ring latewood tracheids. Of the trachied traits, only cell wall thickness showed a marginal location effect (P < 0.10). Measured in the middle-third of the cells, tracheids sampled at the Florida location were about 11% larger in total diameter, lumen diameter, and cell wall thickness, but no difference was detected for tracheid length. Provenance differences were strongest for cell wall thickness (P < 0.01) and marginally important for tracheid length (P < 0.16) and total cell diameter (P < 0.18).Variation among families within provenances was large (P < 0.01 for all tracheid traits) and resulted in relatively high narrow-sense heritability estimates of 0.58 for length, 0.34 for total diameter, 0.22 for lumen diameter, and 0.37 for cell wall thickness. The genetic correlations among these traits were all greater than 0.69 except the correlation between length and lumen diameter which was 0.42. Measurement of tracheid length can be used to assess family differences for cell diameter and cell wall thickness.None of the tracheid traits were strongly correlated with average disk density or the disk density of rings 3-5. Therefore, genetic selection for high average density in 10 to 12 year-old loblolly pines from the provenances studied here will not produce a predictable pattern in the character of outer-ring latewood tracheids.

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Bengtsson, Rune. "Variation in common lime (Tilia x europaea L.) in Swedish Gardens of the 17th and 18th centuries /." Alnarp : Department of Landscape Management and Horticultural Technology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200564.pdf.

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Books on the topic "Provenance variations"

1

Ståhl, Erik G. Provenance variation in early growth and development of Picea mariana (Mill) B.S.P. Uppsala, Sweden: Swedish University of Agricultural Sciences, Faculty of Forestry, 1992.

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Kireger, Eliud Kiplimo. Provenance variation in drought tolerance in Acacia tortilis (Forsk.) Hayne. Ottawa: National Library of Canada, 1993.

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Haverbeke, David F. Van. Genetic variation in ponderosa pine: A 15-year test of provenances in the Great Plains. Fort Collins, Colo: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986.

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Urbaniak, Lech. Zroź̇nicowanie geograficzne sosny zwyczajnej (Pinus sylvestris L.) z terenu Eurazji na podstawie cech anatomicznych i morfologicznych igieł. Poznań: Wydawn. Naukowe Uniwersytetu im. Adama Mickiewicza w Poznaniu, 1998.

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Haverbeke, David F. Van. Genetic variation in eastern white pine: A 15- year test of provenances in eastern Nebraska. Fort Collins, Colo: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1988.

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Muturi, Gabriel Mukuria. Provenance variation of salt tolerance and seedling nutrition in acacia tortillas (Forsk.) Hayne. Ottawa: National Library of Canada, 1993.

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Haverbeke, David F. Van. Genetic variation in Douglas-fir: A 20-year test of provenances in eastern Nebraska. Fort Collins, Colo: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1987.

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Beaudoin, Roger. Variation et choix des provenances de pin sylvestre en plantation sur plusieurs sites au Québec. [Québec]: Ministère des ressources naturelles, Direction de la recherche forestière, 1996.

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Beaudoin, Roger. Variation et choix des provenances de Pinus contorta en plantation sur plusieurs sites au Québec. Sainte-Foy: Gouvernement du Québec, Ministère des ressources naturelles, Direction de la recherche forestière, 1995.

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Abdel-Gadir, Abdelazim Yassin. Intra-ring variations in mature Douglas-fir trees from provenance plantations. 1990.

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Book chapters on the topic "Provenance variations"

1

Zobel, Bruce J., and Johannes P. van Buijtenen. "The Effect of Provenance Variation and Exotic Plantations on Wood Properties." In Wood Variation, 33–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74069-5_2.

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Mikola, Jouni. "Provenance and Individual Variation in Climatic Hardiness of Scots Pine in Northern Finland." In Forest Development in Cold Climates, 333–42. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1600-6_22.

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Shen, X., and X. Chen. "Variation in adaptation and growth as indicated by provenance trial Platycladus orientalis (L.) Franco." In Genetic Response of Forest Systems to Changing Environmental Conditions, 51–61. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9839-2_5.

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Raddi, P., and C. Rinallo. "Variation in needle wax degradation in two silver fir provenances differentiated by tolerance to air pollution." In Genetic Effects of Air Pollutants in Forest Tree Populations, 67–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74548-5_6.

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Amorosi, Alessandro, Maria Luisa Colalongo, Enrico Dinelli, Federico Lucchini, and Stefano Claudio Vaiani. "Cyclic variations in sediment provenance from late Pleistocene deposits of the eastern Po Plain, Italy." In Sedimentary Provenance and Petrogenesis: Perspectives from Petrography and Geochemistry. Geological Society of America, 2007. http://dx.doi.org/10.1130/2007.2420(02).

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Gliozzo, E. "Variations on the silica theme: Classification and provenance from Pliny to current supplies." In The contribution of mineralogy to cultural heritage, 13–86. Mineralogical Society of Great Britain & Ireland, 2019. http://dx.doi.org/10.1180/emu-notes.20.2.

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Goldstrand, P. M. "Provenance and sedimentologic variations of turbidite and slump deposits at Sites 955 and 956." In Proceedings of the Ocean Drilling Program, 157 Scientific Results. Ocean Drilling Program, 1998. http://dx.doi.org/10.2973/odp.proc.sr.157.122.1998.

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Carrapa, B., J. Wijbrans, and G. Bertotti. "Detecting provenance variations and cooling patterns within the western Alpine orogen through 40Ar/39Ar geochronology on detrital sediments: The Tertiary Piedmont Basin, northwest Italy." In Detrital thermochronology - Provenance analysis, exhumation, and landscape evolution of mountain belts. Geological Society of America, 2004. http://dx.doi.org/10.1130/0-8137-2378-7.67.

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Compston, Alastair. "‘To delineate with most skillful hands’." In 'All manner of ingenuity and industry', 125–210. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198795391.003.0004.

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Chapter 3: ‘To delineate with most skillful hands: illustration and the printed works of Thomas Willis’ explains methods for illustrating the printed works. The engraved frontispieces, three allegorical and one depicting Willis and his circle dissecting a human body, are described. Variations of the engraved portrait, first drawn by David Loggan, are documented. The features of 416 separate ornaments, used by twenty-three printers, are described. These include engraved title pages, head and tail pieces, fleurons and decorated capitals. The provenance and details of forty plates illustrating the texts, including work by Christopher Wren, their different states and copies ‘borrowed’ by other authors are documented. Many illustrations of each type are included. The chapter concludes with one table summarizing the number of images, printers’ plate, and leaves found in a complete copy; and another comparing the states used for each book described in the bibliography. {142 words}
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Herz, Norman, and Ervan G. Garrison. "Applications of Stable Isotopes in Archaeological Geology." In Geological Methods for Archaeology. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195090246.003.0020.

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Isotopic ratios of elements in natural materials on the earth either have been constant in time and space or have varied as a result of radioactive decay or geochemical fractionation. Elements which show variations in isotopic abundances in different samples and the reasons for these variations have helped resolve many geological and archaeological problems. Radioactive decay has provided absolute dating clocks: for archaeology, the most useful systems have been associated with 14C, 40Ar, and U-disequilibrium series. Variations in isotopic ratios of the stable elements H, C, O, N, S, Sr, and Pb have helped solve problems of provenance, paleoenvironments, and paleodiets. The rationale for isotopic variations of individual elements will determine the types of applications to archaeological geology. The most important applications are the determinations of artifact signatures, paleodiet, and paleoenvironment. Isotopic fractionation of light elements by physical, chemical, and biological processes is controlled by those thermodynamic properties which are determined by atomic weight and electronic configuration. Thermodynamic properties of molecules that are mass and temperature dependent include energy, which decreases with decreasing temperature, and vibrational frequency, which varies inversely in proportion to the square root of the reduced mass. Easily measurable isotopic separation is generally restricted to the lighter elements, that is, with atomic weights less than 40. Because isotopic fractionation is mass dependent, the separation is greater for elements with the greater mass difference between isotopes. The greatest separation is expected for hydrogen (mass 1) versus deuterium (mass 2); the other light elements commonly have isotopic differences closer to 10%. Thus, the lighter isotopes have higher vibrational energy and their chemical bonds are more easily broken. The different reactivity of lighter versus heavier isotopes of an element is responsible for their separation during geochemical and biological processes. Thermodynamic behavior has been considered a principal cause for variations, not in isotopic abundances of the heavier elements Sr and Pb, but rather in abundances of their parent radionuclides: Rb for Sr and U and Th for Pb. Recently, however, P. Budd and others suggested that under nonequilibrium conditions, fractionation could theoretically take place among the lead isotopes.
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Conference papers on the topic "Provenance variations"

1

Clemens, Hannah, and Bosiljka Glumac. "INTRASAMPLE VARIATIONS IN STABLE ISOTOPE COMPOSITION OF CARRARA MARBLE: IMPLICATIONS FOR PROVENANCE STUDIES." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-316501.

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Pope, Michael, and Walker Ligon. "DETERMINING LITHOLOGIC VARIATIONS, PROVENANCE, AND DEPOSITIONAL ENVIRONMENTS OF THE DEL RIO FORMATION IN WEST TEXAS." In 51st Annual GSA South-Central Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017sc-289538.

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Black, Sophie, Andrea Stevens Goddard, Liz Balgord, Zach Anderson, and Adolph Yonkee. "THE IMPORTANCE OF LOCAL PROVENANCE VARIATIONS IN FORELAND BASIN SYSTEMS: SEVIER FOLD-THRUST BELT, EASTERN WASATCH RANGE OF NORTHEASTERN UTAH." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-381798.

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Butler, Kristina Lynn, Brian K. Horton, Andres Echaurren, Andres Folguera, and Facundo Fuentes. "CRETACEOUS-CENOZOIC GROWTH OF THE PATAGONIAN BROKEN FORELAND BASIN, ARGENTINA: CHRONOSTRATIGRAPHIC FRAMEWORK AND PROVENANCE VARIATIONS DURING TRANSITIONS IN ANDEAN SUBDUCTION DYNAMICS." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-339028.

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Siddoway, Christine S., Alexis K. Ault, and Peter W. Reiners. "A HEMATITE (U-TH)/HE MINIMUM AGE FOR CRYOGENIAN TAVA SANDSTONE, COLORADO, AND VARIATIONS IN DETRITAL ZIRCON PROVENANCE THAT ILLUMINATE THE PALEOGEOGRAPHY OF THE REGION." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-283613.

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Mustaque, Md Sharif, Ashraf Uddin, and Willis Hames. "PROVENANCE VARIATION IN PERMO-CARBONIFEROUS SILICICLASTIC SEQUENCES FROM CENTRAL-EASTERN INDIAN PLATFORM." In Southeastern Section-70th Annual Meeting-2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021se-362382.

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Zhao, Z., R. Littke, and L. Zieger. "STRUCTURAL VARIATION AND PROVENANCE OF SULFUR-RICH ORGANIC MATTER IN NÖRDLINGEN POST-IMPACT SEDIMENTS." In 30th International Meeting on Organic Geochemistry (IMOG 2021). European Association of Geoscientists & Engineers, 2021. http://dx.doi.org/10.3997/2214-4609.202134131.

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MacAlister, Andi, and Rachel Headley. "PROVENANCE VARIATION IN A LAURENTIDE ICE SHEET LAKE MICHIGAN LOBE DEPOSIT, PETRIFYING SPRINGS, KENOSHA, WISCONSIN." In 50th Annual GSA North-Central Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016nc-275436.

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Kasprowicz, Filip A., Ohood Alsalem, and Majie Fan. "DETERMINING VARIATION OF PALEOZOIC SEDIMENT PROVENANCE IN THE PERMIAN BASIN USING DETRITAL ZIRCON U-PB GEOCHRONOLOGY AND MICROTEXTURES." In 54th Annual GSA South-Central Section Meeting 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020sc-343852.

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Machado, Samira Juliana de Moraes, Renato Cagnacci Neto, Marina Sonagli, Hirofumi Iyeyasu, and Fabiana Baroni Alves Makdissi. "ANALYTICAL CROSS-SECTIONAL STUDY TO ASSESS THE IMPACT OF THE COVID-19 PANDEMIC ON THE STAGING OF BREAST CANCER PATIENTS." In XXIV Congresso Brasileiro de Mastologia. Mastology, 2022. http://dx.doi.org/10.29289/259453942022v32s1003.

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Introduction: We are currently living in a state of pandemic by COVID-19, whose virus has high transmissibility and potential lethality. The World Health Organization recommended social isolation, and the Brazilian National Cancer Institute, following this guidance, proposed that the oncological treatment of low-to-moderate aggressive tumors be postponed, including breast cancer. In Brazil, the lockdown was a strategy to reduce the potential impact of the pandemic on health services; consequently, asymptomatic patients postponed their imaging tests this year. Considering this abrupt change in access to health care and in the routine of cancer screening, we theorize that the COVID-19 pandemic may have had a negative impact on diagnosis, treatment, and survival in breast cancer patients. Objective: The aim of this study was to analyze the staging at diagnosis of patients with breast cancer, before and during the pandemic, and to calculate if there was a statistical difference comparing the two groups studied. A secondary objective was to describe clinical and demographic characteristics. Methods: A single-center, cross-sectional analytical study with 1219 patients diagnosed with breast cancer (CID C50 or D05) treated at the Mastology Department of the AC Camargo Cancer Center from March 2019 to February 2021. The following epidemiological variables were evaluated: age at years at diagnosis, clinical staging at diagnosis (TNM 8th edition©), presence of comorbidities (risk group for severe COVID-19), family history of cancer, symptoms at diagnosis, and provenance. Descriptive variables and data analysis was performed using Pearson’s χ2 test or Fisher’s exact test. Results: In this study, 1002 patients were included, divided into two groups: prepandemic (574) and pandemic (428). Both groups had similar demographic and clinical characteristics. There was an increase in the frequency of symptomatic patients in the pandemic period 199 (46.5%) versus nonpandemic period 213 (37.1%) (p=0.003). Anatomical and clinical staging were similar between the groups, with no statistically significant difference. When analyzing the anatomical staging, comparing the prepandemic versus pandemic groups, we observed a higher frequency of tumors: T1 [262 (45.6%) vs. 170 (39.8%), p=0.376]; N0 [398 (69.2%) vs. 288 (67.4%), p=0.194]; M0 [552 (96.0%) vs. 415 (97.2%), p=0.614]. Regarding clinical staging, early malignant tumors (EC Tis, Ia–IIIa) were more frequent, corresponding to 521 (90.8%) prepandemic versus 390 (91.1%) pandemic (p=0.766). Conclusion: There was no significant variation between the groups in terms of staging at diagnosis, but more patients with symptoms related to breast cancer sought cancer care.
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Reports on the topic "Provenance variations"

1

Van Haverbeke, David F. Genetic variation in ponderosa pine: A 15-year test of provenances in the Great Plains. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986. http://dx.doi.org/10.2737/rm-rp-265.

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