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Готові списки джерел за темами / Seedling seed orchards / Статті в журналах

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Статті в журналах з теми "Seedling seed orchards"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Shuleva, Stanimira, Velichko Gagov, and Petar Zhelev. "Outcrossing rates in two seed orchards of Pinus nigra Arn. in Bulgaria." Silva Balcanica 24, no. 1 (2023): 47–54. http://dx.doi.org/10.3897/silvabalcanica.24.e101560.

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Анотація:

Seed orchards are an important source of seeds with improved genetic quality. Here we present results of a study on the genetic composition of seed orchards crop of Austrian black pine (Pinus nigra Arn.). Two seed orchards were included in the study &ndash; a clonal seed orchard established near Sliven, and a seedling seed orchard, established in the region of Simitli. The outcrossing rates were higher in the clonal seed orchard (Sliven), 0.873 and 0.806 multi-locus (tm) and single-locus (ts) estimates, respectively. The same values were 0.623 and 0.530, respectively, in the seedling seed

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2

Shuleva, Stanimira, Velichko Gagov, and Petar Zhelev. "Outcrossing rates in two seed orchards of Pinus nigra Arn. in Bulgaria." Silva Balcanica 24, no. (1) (2023): 47–54. https://doi.org/10.3897/silvabalcanica.24.e101560.

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Анотація:

Seed orchards are an important source of seeds with improved genetic quality. Here we present results of a study on the genetic composition of seed orchards crop of Austrian black pine (<em>Pinus nigra</em> Arn.). Two seed orchards were included in the study – a clonal seed orchard established near Sliven, and a seedling seed orchard, established in the region of Simitli. The outcrossing rates were higher in the clonal seed orchard (Sliven), 0.873 and 0.806 multi-locus (t<sub>m</sub>) and single-locus (t<sub>s</sub>) estimates, respectively. The same values were 0.623 and 0.530, respecti

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3

Powers, H. R., and J. F. Kraus. "A Comparison of Fusiform Rust-Resistant Loblolly Pine Seed Sources." Southern Journal of Applied Forestry 10, no. 4 (1986): 230–32. http://dx.doi.org/10.1093/sjaf/10.4.230.

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Abstract A greenhouse inoculation study compared resistance to fusiform rust (Cronartium quercuum (Berk.) Miyabe ex Shirai f. sp. fusiforme) of loblolly pine (Pinus taeda L.) seedlings derived from bulk seed produced in 4 rust-resistant seed orchards, 1 rust-resistant geographic seed source (Livingston Parish, LA), and a control treatment of improved loblolly from a first-generation production orchard. The rust-resistant orchards included 2 forest industry orchards developed from the most rust-resistant clones available within a tree improvement cooperative (1st generation), and both a clonal

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4

Hayda, Yuriy, Svitlana Los, Roman Yatsyk, et al. "Seed orchards in Ukraine: past, present and prospects for the future." Folia Forestalia Polonica 61, no. 4 (2019): 284–98. http://dx.doi.org/10.2478/ffp-2019-0028.

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Abstract The seed orchards (SO) serve possibilities to collect seeds from the selected genotypes or to create artificial population throughout the controlled crossing of the target genotypes. Therefore, the seed material obtained from the clonal and seedling seed orchards offers unique opportunity to improve the genetic value of seeds. Thus, the seed orchards are considered as an important part of the forest seed base being the key object for both modern forestry and forestry research. This paper outlines the forest breeding activities associated with the seed production in the seed orchards i

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5

Nurtjahjaningsih, I. L. G. "PARENT IDENTIFICATION IN A MULTI LOCATION TRIAL SEED ORCHARD OF ACACIA MANGIUM USING MICROSATELLITE MARKERS." Indonesian Journal of Forestry Research 3, no. 1 (2016): 19–26. https://doi.org/10.59465/ijfr.2016.3.1.19-26.

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Variation of parent gametes' contribution might affect the growth patterns among offspring produced from seed orchards. This paper studies the mating system statuses and to identify parent trees that produce good growth performance of offspring in seedling seed orchard of A. mangium. The study was conducted in two seed orchards, i.e. a first generation seedling seed orchard (F1 SSO) of A. mangium, used as the parent population hereafter and a multi location trial (MLT) as an offspring population. Based on 10 microsatellite markers, mating system in the F1 SSO was under panmictic equilibrium co

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6

Jones, Wayne. "Strategies employed by Sappi Forests for improved seed production of temperate and sub-tropical pine and eucalypt species, and their hybrids, for long-term sustainability in a changing environment." Agrociencia Uruguay 27, NE2 (2023): e1247. http://dx.doi.org/10.31285/agro.27.1247.

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The annual demand and supply of genetically improved planting stock suitable for sites across varying landscapes, with changing climatic conditions and increasing pest and disease threats are becoming more complex. The agility for effective responses to long-term sustainability of commercial plantations, aimed at different markets, requires a significant investment in genetic resource acquisitions, tree breeding, land management, gene conservation and plant production systems. Tree breeding is one of our most important adaptation strategies in response to climate change and related challenges.

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7

Leksono, Budi, Susumu Kurinobu, and Yuji Ide. "AN OPTIMUM DESIGN FOR SEEDLING SEED ORCHARDS TO MAXIMIZE GENETIC GAIN: AN INVESTIGATION ON SEEDLING SEED ORCHARDS OF Eucalyptus pellita F. Muell." JOURNAL OF FORESTRY RESEARCH 6, no. 2 (2009): 85–95. https://doi.org/10.20886/ijfr.2009.6.2.85-95.

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 The optimum design of seedling seed orchards in order to maximize genetic gain was investigated. Variance components were estimated on the basis of heigts of individual plants in the first-generation seed orchards of Encaliptus pelita with ages of 1 to 5 years old. The seed orchards were established at two locations in Indonesia - South Kalimantan and South Sumatra. There were three types of variance components,comprising family variance ,plot error variance, and within plot variance was derived using family variance as a percentage. A linear regression equation within plot variance was

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8

Nurtjahjaningsih, I. L. G. "PARENT IDENTIFICATION IN A MULTI LOCATION TRIAL SEED ORCHARD OF ACACIA MANGIUM USING MICROSATELLITE MARKERS." JOURNAL OF FORESTRY RESEARCH 3, no. 1 (2016): 19–26. https://doi.org/10.20886/ijfr.2016.3.1.19-26.

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Анотація:

Variation of  parent gametes' contribution might affect the growth patterns among offspring produced from seed orchards. This paper studies the mating system statuses and to identify parent trees that produce good growth performance of  offspring in seedling seed orchard of <em>A. mangium</em>. The study was conducted in two seed orchards, i.e. a first generation seedling seed orchard (F1 SSO) of  <em>A. mangium,</em> used as the parent population hereafter and a multi location trial (MLT) as an offspring population. Based on 10 microsatellite markers, mating system in the F

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9

Owens, John N., and Danilo D. Fernando. "Pollination and seed production in western white pine." Canadian Journal of Forest Research 37, no. 2 (2007): 260–75. http://dx.doi.org/10.1139/x06-220.

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The reproductive biology of western white pine ( Pinus monticola Dougl. ex D. Don) at the Saanich seed orchard (SSO; a coastal seedling seed orchard) and the Kalamalka seed orchard (KSO; an interior clonal seed orchard) is described. Seed-cone development and morphology determine seed potential and affect filled seed production. Seed potential was high, commonly over 200 seeds per cone and filled seeds per cone averaged 50–60 at both orchards in 1999 from open pollinations combined with operational supplemental mass pollinations (OP-SMP). Filled seeds per cone at SSO in 2004 averaged 115 with

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10

Nelson, C. Dana, and Carl A. Mohn. "Genetic variance of early height growth and expected gains from selection in a Minnesota population of black spruce." Canadian Journal of Forest Research 21, no. 1 (1991): 11–19. http://dx.doi.org/10.1139/x91-002.

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A genetic improvement project for black spruce (Piceamariana (Mill.) B.S.P.) was initiated in Minnesota in 1974, with an objective of improving the inherent growth rate of the local population. This study reports some field results from the initial phase of the project. Study objectives were to (i) estimate genetic and environmental variance components of early (age 10 years) tree height, (ii) estimate expected genetic gains from various selection methods in three seedling seed orchards and a clonal seed orchard, and (iii) evaluate the effect that these selection methods have on inbreeding lev

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11

Varghese, M., D. Lindgren, and A. Nicodemus. "Fertility and Effective Population Size in Seedling Seed Orchards of Casuarina equisetifolia and C. junghuhniana." Silvae Genetica 53, no. 1-6 (2004): 164–68. http://dx.doi.org/10.1515/sg-2004-0030.

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Abstract Two seedling seed orchards each of C. equisetifolia and C. junghuhniana established by thinning provenance trials in coastal and inland locations in South India were evaluated for sex expression and fertility variation at four years. More than 80% of the trees in C. equisetifolia orchards were fertile in both sites with a similar pattern of more (almost 2 times) female trees and equal proportion of monoecious and non-flowering trees. In C. junghuhniana, the coastal orchard had twice the proportion of fertile trees as that of the inland. Orchards established in coastal environment had

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12

Thompson, T. E., and L. J. Grauke. "Pecan Tree Growth and Precocity." Journal of the American Society for Horticultural Science 128, no. 1 (2003): 63–66. http://dx.doi.org/10.21273/jashs.128.1.0063.

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Анотація:

Precocity of pecan [Carya illinoinensis (Wangenh.) C. Koch] seedlings (year of first fruit production) was studied in relation to original seed measurements (nut weight, buoyancy, volume, and density) and in relation to growth index (GI) measurements of seedling trees for 4 years. A total of 2,071 pecan seedlings, representing nine controlled-cross families, were studied. Original seed measurements were not related to precocity of resultant seedling trees; but seed weight, buoyancy, and volume were significantly correlated with seedling growth rates. Nut density was negatively related to growt

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13

Thompson, T. E., and L. J. Grauke. "Pecan Tree Growth and Precocity." Journal of the American Society for Horticultural Science 128, no. 1 (2003): 63–66. https://doi.org/10.21273/jashs.128.1.63.

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Анотація:

Precocity of pecan [Carya illinoinensis (Wangenh.) C. Koch] seedlings (year of first fruit production) was studied in relation to original seed measurements (nut weight, buoyancy, volume, and density) and in relation to growth index (GI) measurements of seedling trees for 4 years. A total of 2,071 pecan seedlings, representing nine controlled-cross families, were studied. Original seed measurements were not related to precocity of resultant seedling trees; but seed weight, buoyancy, and volume were significantly correlated with seedling growth rates. Nut density was negatively related to growt

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14

Pâques, L. E., G. Philippe, and D. Prat. "Identification of European and Japanese Larch and Their Interspecific Hybrid with Morphological Markers: Application to Young Seedlings." Silvae Genetica 55, no. 1-6 (2006): 123–34. http://dx.doi.org/10.1515/sg-2006-0018.

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Abstract Open-pollinated hybridisation seed orchards of European and Japanese larches produce mixed progenies combining a highly variable proportion of hybrids along with pure parental species. For several reasons, it is desirable to identify and to sort out hybrids from pure species at the seedling stage. Taxa identification of 1-2 yr-old seedlings was attempted using non-destructive assessment of several traits, including morphology, phenology, growth and architecture parameters. Two sets of progenies originating from 10 open-pollinated hybridisation seed orchards were used, relying in a fir

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15

Hansen, J. K., H. Wellendorf, and E. D. Kjær. "Low Cost Improvement of Coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) By Application of The Breeding Seed Orchard Approach in Denmark." Silvae Genetica 54, no. 1-6 (2005): 218–27. http://dx.doi.org/10.1515/sg-2005-0032.

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Abstract An evaluation of a seedling seed orchard in Denmark of Coastal Douglas-fir showed variation between open pollinated families in their susceptibility to windthrow, height and diameter growth, stem straightness, number of forks at age 10 and bud burst at age 9. Individual narrow-sense heritability was 0.63 for bud burst, 0.40 for height and diameter, respectively, 0.48 for stem straightness, 0.20 for number of forks and 0.17 for windthrow susceptibility. Fast growing families were characterised by late bud burst, and poorer stem straightness. The approach of using seedling seed orchards

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16

Morgenstern, E. K., and B. S. P. Wang. "Trends in forest depletion, seed supply, and reforestation in Canada during the past four decades." Forestry Chronicle 77, no. 6 (2001): 1014–21. http://dx.doi.org/10.5558/tfc771014-6.

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Progress in reforestation is reviewed and the results of a 1999 survey of seed collection and utilization are presented. The review includes forest depletion, regeneration and seed supply for Canada for the 1960–99 period. Depletion of stocked, timber-productive land has increased from less than 2 million ha annually to just under 2.5 million ha, primarily due to an increase in harvesting from about 800 000 ha to slightly over 1 million ha in recent years, and also due to larger fires during the last decade. The depleted area amounts to 1% of the total commercial forest. Natural regeneration c

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17

Caron, G. É. "Seed-cone and pollen-cone production models for young black spruce seedling seed orchards: a first approximation." Canadian Journal of Forest Research 25, no. 6 (1995): 921–28. http://dx.doi.org/10.1139/x95-101.

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Seed orchard managers wanting to predict potential seed-cone (Sc) and pollen-cone (Pc) production 1 year in advance of seed release and pollen dissemination need predictive models. The present study proposes the use of cone-crop models based on tree age in young black spruce (Piceamariana (Mill.) B.S.P.) orchards. Sc and Pc production was monitored from 1987 to 1993 in each of five seedling seed orchards. Some trees began bearing Sc and Pc by tree age 6. The relationships of Sc and Pc production with tree age were each represented by three sigmoid equations: one for light crop years, one for h

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18

Yardibi, Fatma, Kyu-Suk Kang, Alper Özbey, and Nebi Bilir. "Bibliometric Analysis of Trends and Future Directions of Research and Development of Seed Orchards." Forests 15, no. 6 (2024): 953. http://dx.doi.org/10.3390/f15060953.

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Seed orchards are important seed resources for producing improved tree crops for future plantations, forest restoration, and forestry practices (i.e., gene conservation) and for transmitting current gene diversity to future generations. Seed orchards are a major sub-division in forest science. The establishment and management of a seed orchard involves many steps, from the selection of superior trees to the harvesting of a seed crop. Studying the trends and future directions of seed orchards using different analysis methods is critically important, especially to establish resistant forests via

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19

Rocha, Aline, Tânia Maria Fernandes Salomão, Dalmo Lopes de Siqueira, Cosme Damião Cruz, and Luiz Carlos Chamhum Salomão. "Identification of 'Ubá' mango tree zygotic and nucellar seedlings using ISSR markers." Revista Ceres 61, no. 5 (2014): 597–604. http://dx.doi.org/10.1590/0034-737x201461040001.

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Polyembryonic seeds are characterized by the development of over one embryo in the same seed, which can be zygotic and nucellar. The objective of this work was to identify the genetic origin, whether zygotic or nucellar, of seedlings of polyembryonic seeds of 'Ubá' mango tree using ISSR markers, and relating them with the vigor of the seedlings. Thus, mangos were harvested in Visconde do Rio Branco (accession 102) and Ubá (accessions 112, 138, 152 and 159), whose seeds were germinated in plastic trays filled with washed sand. Fifty days after sowing, seedlings from five seeds of each one of th

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20

Simpson, Dale, and Kathleen Tosh. "The New Brunswick Tree Improvement Council is 20 years old." Forestry Chronicle 73, no. 5 (1997): 572–77. http://dx.doi.org/10.5558/tfc73572-5.

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Applied breeding programs in New Brunswick have been coordinated for the past 20 years by the New Brunswick Tree Improvement Council. First-generation programs for black spruce (Picea mariana [Mill.] BSP) and jack pine (Pinus banksiana Lamb.) consisted of seedling seed orchards and open-pollinated family tests, in contrast to those of white spruce (Picea glauca [Moench] Voss) and tamarack (Larix laricina [Du Roi] K.Koch), which were clonal seed orchards and control-pollinated progeny tests. Production from the seed orchards has been regular and heavy. In only 15 years, most reforestation stock

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21

Fitch, Maureen M. M., Paul H. Moore, Terryl C. W. Leong, et al. "Clonally Propagated and Seed-derived Papaya Orchards: I. Plant Production and Field Growth." HortScience 40, no. 5 (2005): 1283–90. http://dx.doi.org/10.21273/hortsci.40.5.1283.

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Papaya seedlings segregate for sex expression as females or hermaphrodites. Typically only hermaphrodite fruit are marketed in Hawaii. The agronomic practice of growing multiple seedlings that are later thinned to a single hermaphrodite tree is wasteful of seed, labor, and resources, especially when seed is costly. We compared growth of plants propagated by the clonal methods of micropropagation or rooting vegetative cuttings versus plants initiated as seedlings and transplanted. The seedlings were either single-planted hermaphrodites as identified by the polymerase chain reaction (PCR) or mul

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22

Beineke, Walter F. "Twenty Years of Black Walnut Genetic Improvement at Purdue University." Northern Journal of Applied Forestry 6, no. 2 (1989): 68–71. http://dx.doi.org/10.1093/njaf/6.2.68.

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Abstract In 1967 a black walnut tree improvement program was initiated by Purdue University for the state of Indiana. Techniques of superior tree selection, grafting, controlled pollination, close-spaced progeny testing, and early second-generation selection were developed. The success of this program has been demonstrated by the establishment of 40 acres of clonal and seedling black walnut seed orchards and the production of 30,000 improved seedlings in 1986 and 1987. Nine patented clones, the first patents granted for timber purposes, were released to private industry for production and sale

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23

Edwards, D. G. W., and Y. A. El-Kassaby. "The biology and management of coniferous forest seeds: Genetic perspectives." Forestry Chronicle 72, no. 5 (1996): 481–84. http://dx.doi.org/10.5558/tfc72481-5.

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The biological impact of forest tree reproductive processes and the extent of management practices of seed orchards and nurseries on the genetic representation of new forests, are discussed in a holistic fashion. All the steps in tree reproduction, their timing and duration, and how seeds are used to produce new plants for artificial regeneration, especially in containerized nurseries, are intimately related, cumulative, and bear directly on the genetic composition of the seedling crop. These processes and their interactions need to be more fully understood to maximize genetic gain, and for th

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24

Leksono, Budi, Susumu Kurinobu, and Yuji Ide. "An Optimum Design For Seedling Seed Orchards To Maximize Genetic Gain: An Investigation On Seedling Seed Orchards Of Eucalyptus pellita F. Muell." Indonesian Journal of Forestry Research 6, no. 2 (2009): 85–95. http://dx.doi.org/10.20886/ijfr.2009.6.2.85-95.

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25

Isaac, Wendy-Ann P., Richard A. I. Brathwaite, and Ayub Khan. "Commelina diffusaPopulation Dynamics in Banana and Ruderal Habitats under Mechanical and Herbicide Management Regimes." International Journal of Agronomy 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/605745.

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Commelina diffusais a colonising species of banana orchard habitats in St. Vincent in the Windward Islands of the Caribbean. In the present study, the population dynamics ofC. diffusawere investigated in response to mechanical weed management with either a rotary string trimmer or glufosinate in ruderal and banana habitats. The study focused on density and size distribution of the weed over time and their response to two weed management strategies. The population dynamics ofC. diffusadiffered between the two habitats. Seedling establishment appeared to be an important factor influencing the dy

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26

Himanen, Katri, Pekka Helenius, Tiina Ylioja, and Markku Nygren. "Intracone variation explains most of the variance in Picea abies seed weight: implications for seed sorting." Canadian Journal of Forest Research 46, no. 4 (2016): 470–77. http://dx.doi.org/10.1139/cjfr-2015-0379.

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Norway spruce (Picea abies (L.) Karst.) seed is collected from both forest stands after final felling and from seed orchards. To produce high-germinability seed lots that are easy to use in nursery sowing machines, empty, insect-damaged, and other poor-quality seeds are culled. Sorting is done typically by weight or size. Previous studies of conifer seed have indicated wide variation in seed weight between individual trees or clones. However, the intratree or intraclone variations have rarely been taken into account, and intracone variation in seed weight has not been examined. We collected co

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27

Muir, K., M. Byrne, E. Barbour, M. C. Cox, and J. E. D. Fox. "High Levels of Outcrossing in a Family Trial of Western Australian Sandalwood (Santalum spicatum)." Silvae Genetica 56, no. 1-6 (2007): 222–30. http://dx.doi.org/10.1515/sg-2007-0033.

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Анотація:

Abstract The mating system of Western Australian sandalwood (Santalum spicatum) was investigated in seed collections from a family trial. The mean outcrossing rate was high (95.2%) although there was variation among families and one family showed particularly low outcrossing, high bi-parental inbreeding and high correlated paternity. Variation in flowering time between this family and others in the trial was the most likely cause of the high inbreeding and low number of fathers contributing to the seed crop in trees from this family. The high level of outcrossing in the rest of the families in

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28

El-Kassaby, Y. A. "Domestication and genetic diversity — should we be concerned?" Forestry Chronicle 68, no. 6 (1992): 687–700. http://dx.doi.org/10.5558/tfc68687-6.

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Анотація:

Despite the fact that forest trees are in their early stages of domestication, there has been little direct evaluation of the genetic diversity throughout this process. The dynamic changes in the genetic structure of wild conifers were monitored through several bottlenecks, namely: phenotypic selection, seed orchards, seed processing and storage methods, and seedling production. The genetic structure of phenotypically vs. randomly selected individuals of two conifers with known contrasting diversity levels is compared. The biology and management methods practiced in seed orchards are evaluated

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29

Rockwood, Donald L., Dudley A. Huber, Mark A. Crawford, et al. "Eucalyptus Amplifolia and Corymbia Torelliana in the Southeastern USA: Genetic Improvement and Potential Uses." Forests 13, no. 1 (2022): 75. http://dx.doi.org/10.3390/f13010075.

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Анотація:

Eucalyptus amplifolia and Corymbia torelliana genetic improvement has been conducted in the lower southeastern USA by UF and collaborators since 1980. The collective accomplishments in genetic resources and potential commercial uses are summarized. For example, fast-growing, freeze-resilient E. amplifolia seeds are provided by 1st and 2nd generation seedling seed orchards (SSO) and a 2nd generation clonal seed orchard (CSO), while C. torelliana seed are available from 1st and 2nd generation SSOs. Breeding values (BV) have been developed for guiding the deployment of improved genotypes. Collabo

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30

Kamalakannan, R., M. Varghese, and D. Lindgren. "Fertility Variation and its Implications on Relatedness in Seed Crops in Seedling Seed Orchards of Eucalyptus camaldulensis and E. tereticornis." Silvae Genetica 56, no. 1-6 (2007): 253–59. http://dx.doi.org/10.1515/sg-2007-0036.

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Анотація:

Abstract Seedling seed orchards of Eucalyptus tereticornis (N =192 & 505) and E. camaldulensis (N =182 & 525) were established at two sites (one moist and one dry) in southern India. The fertility (based on the number of flowers and fruits) was registered for each tree at age eight and nine years. E. camaldulensis on the moist location had 73% fertile trees and low fertility difference (sibling coefficient, Ψ, was 2.27) at eight years. whereas Only 23% trees were fertile in the E. tereticornis orchard at the same site and the fertility variation was high (Ψ =11.71). In the dry location

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Fogal, W. H., G. R. Larocque, S. M. Lopushanski, et al. "Nutritional and Sexual Responses of Jack Pine to Ammonium Nitrate and Gibberellins." Forest Science 45, no. 1 (1999): 136–53. http://dx.doi.org/10.1093/forestscience/45.1.136.

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Abstract The nutritional and sexual responses of jack pine (Pinus banksiana Lamb.) seed orchard trees to NH4NO3 fertilization and GA4/7 foliar sprays were examined in seedling and grafted orchards at an Ontario location where soils were low N acidic sandy loams and in a Saskatchewan grafted orchard on high N calcareous sandy clay loams. High seed strobilus abortion and low pollen strobilus production and seed yields characterized the Saskatchewan trees. NH4NO3 fertilizer increased soil NH4+ and NO3- at both locations, current-year needle N and Mg in Ontario, Fe in Saskatchewan, and Ca at both

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32

Viera, William, Takashi Shinohara, Atsushi Sanada, Naoki Terada, Lenin Ron, and Kaihei Koshio. "Seed Germination and Seedling Growth of Yellow and Purple Passion Fruit Genotypes Cultivated in Ecuador." Horticulturae 8, no. 8 (2022): 754. http://dx.doi.org/10.3390/horticulturae8080754.

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Анотація:

Seed is a fundamental tool to carry out breeding processes and for the propagation of the crops; however, seed propagation generally has low and irregular germination. Passion fruit (Passiflora) species are economically important for Ecuador, which is the main exporter of passion fruit concentrate in Latin America. Ecuadorian farmers propagate new plants by seeds to establish new passion fruit orchards or to extend their cultivated area. The objective of this research was to determine the differences in germination and seedling development with the application of priming methods in five genoty

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Nielsen, Ulrik Bräuner, and Ole Kim Hansen. "Response to Selfing in Seed Set, Seedling Establishment and Nursery Growth Based on Controlled Crosses of Abies nordmanniana Clones." Silvae Genetica 59, no. 1-6 (2010): 90–98. http://dx.doi.org/10.1515/sg-2010-0011.

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Анотація:

Abstract Nordmann fir (Abies nordmanniana) is used for production of high value Christmas trees in short rotation. Potentially all trees are intended to be sold - no thinnings are normally applied. A high proportion of saleable trees per ha is the main key to secure economic return to the growers. Consumers demand a symmetric and rather uniform tree and, dependent on local traditions, it should be more or less dense and narrow. In Denmark, breeding of Nordmann fir and establishment of seed orchards focus on seed supply and improved Christmas tree quality - aiming at adaption and a rather unifo

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34

Smith, Ronald F. "Effects of stem injections of gibberellin A4/7 and paclobutrazol on sex expression and the within-crown distribution of seed and pollen cones in black spruce (Picea mariana)." Canadian Journal of Forest Research 28, no. 5 (1998): 641–51. http://dx.doi.org/10.1139/x98-034.

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Анотація:

Two experiments in black spruce (Picea mariana (Mill.) BSP) seedling seed orchards were established to determine if a stem injection of paclobutrazol (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl) could be used as an adjunct treatment to increase the efficacy of stem injections of gibberellins A4 and A7 (GA4/7). Trees received a single injection of GA4/7 and (or) paclobutrazol shortly after vegetative bud burst. There was a dose-dependent but nonlinear increase in the production of cones of both sexes in response to stem injections of either GA4/7 or paclobutrazol. The opt

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35

Struve, Daniel K., Diane Doud Miller, and David C. Ferree. "Chemical Growth Retardants Increase Seed Yield in Apple Trees." Journal of Environmental Horticulture 7, no. 2 (1989): 75–79. http://dx.doi.org/10.24266/0738-2898-7.2.75.

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Анотація:

Abstract In two experiments the effects of trunk drenches with two gibberellin biosynthesis inhibitors on vegetative growth, seed yield and quality of ‘Delicious’ and ‘Golden Delicious’ apple trees were studied. In the first experiment trunk drenches of either paclobutrazol or uniconizole were applied to ‘Golden Delicious’ apple trees in spring 1984. Both chemicals significantly reduced shoot length in 1985 and 1986. In 1986, fruit number tended to be higher in treated trees, but was less than untreated trees in 1985 and 1984. The estimated number of sound seeds produced in 1986 on treated tre

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36

Władysław, Barzdajn, and Bruder Maciej. "Tree testing and estimation of heritability using the pedunculate oak Quercus robur L. seed orchard in the Krotoszyn Forest District." Lesne Prace Badawcze / Forest Research Papers 79, no. 4 (2018): 309–15. https://doi.org/10.2478/frp-2018-0031.

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In this paper, we present the results and analyse of tree height measurements, phenological observations (bud flushing), oak powdery mildew symptoms and multiple shoots of pedunculate oaks<em> Quercus robur</em> L. at the age of 12 years. The examined oaks belonged to 29 open pollination families. Family as well as individual heritability scored very highly for their respective indices. The calculated indices were 0.83 for tree height, 0.98 for flushing of buds, 0.53 for oak powdery mildew symptoms and 0.58 for the multi-stem index. Family seed orchards established using a completely randomize

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INTANON, Suphannika, Buntoon WIENGMOON, and Carol A. MALLORY-SMITH. "Seed morphology and allelopathy of invasive Praxelis clematidea." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 48, no. 1 (2020): 261–72. http://dx.doi.org/10.15835/nbha48111831.

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Анотація:

Praxelis [Praxelis clematidea (Griseb.) R.M.King & H.Rob.] is an invasive species that infests many agricultural systems globally, such as orchards, rubber plantations, and other economic crops. The purpose of this research was to study seed morphology, germination factors, and allelopathy of aboveground parts of P. clematidea. P. clematidea seeds are small, light, and possess pappi that allow them to be dispersed easily by wind or animals. Among four P. clematidea populations collected from different provinces in Thailand, the size of P. clematidea seeds ranged from 2.6 to 3.2 mm in lengt

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Nirsatmanto, Arif, Teguh Setyaji, and Wahyuningtyas Reny Setyo. "REALIZED GENETIC GAIN AND SEED SOURCE X SITE INTERACTION ON STAND VOLUME PRODUCTIVITY OF ACACIA MANGIUM." JOURNAL OF FORESTRY RESEARCH 1, no. 1 (2014): 21–32. https://doi.org/10.20886/ijfr.2014.1.1.21-32.

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Following the results of the comprehensive tree improvement programs for Acacia mangium, it is necessary to estimate the real amount of genetic improvement and to develop an improved seed deployment strategy.  This study was aimed to verify realized genetic gain on stand volume productivity attained by the first-generation Seedling Seed Orchards (SSO) of A. mangium and to identify the magnitude of seed sources x site interaction as a basis for improved seed deployment. Seeds from five SSOs were tested together with seeds from seed stand in genetic gain trials which were established in Sou

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39

Rawat, B., C. Sharma, and Sunil Ghildiyal. "Nature of variability in cone and seed characteristics and germination behaviour of different seed sources of silver fir (Abies pindrow Spach.)." Indian Journal of Forestry 31, no. 4 (2008): 651–58. http://dx.doi.org/10.54207/bsmps1000-2008-uo763j.

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Анотація:

Five seed sources of A. pindrow, collected from Garhwal Himalaya were studied for cone and seed characteristics and germination behaviour. Three different sizes of cones (large, medium and small) were observed in all the seed sources. The dimensions of large (14.25 x 4.76-16.04 x 4.56 cm), medium (11.45 x 4.17-12.28 x 4.43 cm) and small (9.01 x 4.05-9.68 x 4.08 cm) sized cones in 5 different seed sources of A. pindrow oscillated greatly. The maximum cone moisture content also varied significantly (45.22-55.37%) in the cones. The largest seed observed was 1.17 cm long x 0.87 cm wide and the sma

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40

Yang, Cheng, Ruihong Sun, Xingtao Lu, et al. "Seed-Germination Ecology of Vicia villosa Roth, a Cover Crop in Orchards." Agronomy 12, no. 10 (2022): 2488. http://dx.doi.org/10.3390/agronomy12102488.

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Анотація:

Vicia villosa Roth is an annual cover crop that is widely grown in orchards in China. Information on seed ecology is valuable as it helps famers to plant cover crops and manage other weed species in agricultural practice; however, information on V. villosa seed-germination ecology is limited. Thus, this study investigated the seed germination and seedling emergence of V. villosa under various temperatures, photoperiods, levels of salt stress, pH, levels of osmotic stress, and burial depths. The results showed that the germination values of the V. villosa seeds were greater than 93% at the cons

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41

Leksono, Budi, Susumu Kurinobu, and Yuji Ide. "Realized genetic gains observed in second generation seedling seed orchards ofEucalyptus pellitain Indonesia." Journal of Forest Research 13, no. 2 (2008): 110–16. http://dx.doi.org/10.1007/s10310-008-0061-0.

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42

De Groot, Peter, and Frank Schnekenburger. "Cone traits of jack pine and black spruce in young seedling seed orchards." New Forests 12, no. 3 (1996): 279–91. http://dx.doi.org/10.1007/bf00027936.

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43

Silva, Tanismare Tatiana de Almeida, Renato Mendes Guimarães, Édila Vilela de Resende Von Pinho, and Luciana Aparecida de Souza Abreu. "Storage of 'Swingle' citrumelo seeds in different maturation stages subjected to fungicide treatment." Revista Brasileira de Sementes 33, no. 4 (2011): 768–76. http://dx.doi.org/10.1590/s0101-31222011000400019.

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The establishment of citrus orchards with rootstocks from seed with a low physiological quality has been a recurring problem. Low quality seeds directly affect both the final stand and the time required for seedling production. The irregular maturation of fruits, seed recalcitrance, and the high incidence of fungi, make long term storage difficult, even at low temperatures. This study evaluated the storage potential and the use of fungicide treatments on 'Swingle' citrumelo seeds extracted from fruits collected at two maturation stages, green or ripe. The seeds were subjected to a thermal trea

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44

Gonzaga, J. M. S., R. O. Manoel, A. C. B. Sousa, et al. "Pollen contamination and nonrandom mating in a Eucalyptus camaldulensis Dehnh seedling seed orchard." Silvae Genetica 65, no. 1 (2016): 1–11. http://dx.doi.org/10.1515/sg-2016-0001.

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AbstractEucalyptus camaldulensishas potential for timber, energy, pulp and cellulose production in Brazil due to its ability to adapt to a variety of environmental conditions. The use of improved seeds, selected for economic growth traits, is necessary to increase productivity of commercial stands. Seed seedlings orchards (SSO) are one option for improved seed production. However, pollen contamination from unimproved populations, as well as non-random mating in the SSO, can decrease the predicted genetic gains in selected populations. Thus, we investigate the mating system, pollen flow and dis

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45

Dunlop, R. W., M. D. V. Resende, and S. L. Beck. "Early Assessment of First Year Height Data from Five Acacia mearnsii (black wattle) Sub-populations in South Africa using REML/BLUP." Silvae Genetica 54, no. 1-6 (2005): 166–74. http://dx.doi.org/10.1515/sg-2005-0025.

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Abstract Recent research has shown, Acacia mearnsii (black wattle) to be a source of high quality pulp. This led to a change in the emphasis in the breeding programme at the Institute for Commercial Forestry Research, from improving bark yield and quality, to improving timber yield and quality while maintaining an acceptable bark quality. A Multiple Population Breeding Strategy was implemented to cater for these changes. Five sub-populations were established across different sites in KwaZulu- Natal and were determined by origin of seed. Each sub-population was established as a progeny trial wi

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46

da Silveira Bueno, Rafael, Emilio Badalamenti, Ettore Barone, et al. "First Assessment of Natural Regeneration and Seed Dispersal of Persian Walnut (Juglans regia L.) in Mediterranean Agroecosystems." Arboriculture & Urban Forestry 46, no. 3 (2020): 174–84. http://dx.doi.org/10.48044/jauf.2020.013.

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Persian walnut (Juglans regia L.), which is native to Central Asia, has been widely cultivated throughout Europe over millennia as a multipurpose tree. However, only recently the naturalization process outside cultivation has been studied, mostly in temperate Europe, with no information regarding the Mediterranean region. Here we provide the first field investigations about the natural regeneration of walnut in two traditional Mediterranean agroecosystems: an irrigated mixed orchard in suburban areas and a non-irrigated prickly pear (Opuntia ficusindica [L.] Mill.) orchard. The natural regener

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47

Leksono, Budi. "BREEDING ZONES BASED ON GENOTYPE-ENVIRONMENT INTERACTION IN SEEDLING SEED ORCHARDS OF Eucalyptus pellita IN INDONESIA." JOURNAL OF FORESTRY RESEARCH 6, no. 1 (2009): 74–84. https://doi.org/10.20886/ijfr.2009.6.1.74-84.

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Анотація:

The magnitude  of the genotype-environment interaction (GEI) in seven six years  old seedling  seed orchards  of <em>Eucalyptus pellita </em>established  at three locations  in Indonesia  was examined  by analyzing height  and diameter.  The seed orchard  at each location  consists of 121 families  from three  provenances  of Papua  New  Guinea.  The pooled  sum of squares derived from analysis  of variance  of growth  of the three provenances  was used to estimate genetic  p

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48

Mejía-Jaramillo, Luz, Carlos Barrera-Sánchez, and Oscar Córdoba-Gaona. "Effect of the seed weight on the growth of young avocado rootstock seedlings." Bioagro 34, no. 2 (2022): 183–94. http://dx.doi.org/10.51372/bioagro342.8.

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The cultivation of avocado cv. Hass (Persea americana Miller) in Colombia has grown in recent years. Among the country's challenges is to increase the orchards' productivity by guaranteeing grafts plants the best agronomic, genetic, and phytosanitary parameters. This work aims to evaluate for 90 days (nursery phase) the growth and development of avocado rootstocks originated from seeds with different weight ranges. A completely randomized experimental design was carried out, with treatments consisting in four Creole avocado seed weights (40-60 g, 60-80 g, 80-100 g, and over 100 g). In general,

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49

Ross, S. D., J. E. Webber, R. P. Pharis, and J. N. Owens. "Interaction between gibberellin A4/7 and root-pruning on the reproductive and vegetative process in Douglas-fir. I. Effects on flowering." Canadian Journal of Forest Research 15, no. 2 (1985): 341–47. http://dx.doi.org/10.1139/x85-055.

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In two seed orchard trials, profuse female flowering was induced in young, but ontogenetieally mature grafts of inherently poor-flowering clones (1979) and in 9-year-old seedling-origin trees of both good- and poor-flowering families (1981) of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) by the cultural treatment of root-pruning in conjunction with stem injections of the gibberellin A4 and A7 (GA4/7) mixture. Promotion of male flowering, however, was confined to the more sexually mature grafts. As an individual treatment in the 1981 study, root-pruning was more effective than GA4/7, parti

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50

Nirsatmanto, Arif, Teguh Setyaji, and Reny Setyo Wahyuningtyas. "REALIZED GENETIC GAIN AND SEED SOURCE X SITE INTERACTION ON STAND VOLUME PRODUCTIVITY OF ACACIA MANGIUM." Indonesian Journal of Forestry Research 1, no. 1 (2014): 21–32. https://doi.org/10.59465/ijfr.2014.1.1.21-32.

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Анотація:

Following the results of the comprehensive tree improvement programs for Acacia mangium, it is necessary to estimate the real amount of genetic improvement and to develop an improved seed deployment strategy. This study was aimed to verify realized genetic gain on stand volume productivity attained by the first-generation Seedling Seed Orchards (SSO) of A. mangium and to identify the magnitude of seed sources x site interaction as a basis for improved seed deployment. Seeds from five SSOs were tested together with seeds from seed stand in genetic gain trials which were established in South Kal

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