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Journal articles on the topic 'Seedling seed orchard'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 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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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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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

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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5

Wennström, Ulfstand, Urban Bergsten, and Jan-Erik Nilsson. "Early seedling growth of Pinus sylvestris after sowing with a mixture of stand and orchard seed in dense spacings." Canadian Journal of Forest Research 31, no. 7 (2001): 1184–94. http://dx.doi.org/10.1139/x01-050.

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Effects on early seedling growth of seeding stand and orchard seed of Pinus sylvestris L. in different mixtures (100, 75, 50, 25, and 0% of orchard seed) at 4-cm target spacing were quantified in one nursery and one field experiment during a 2- and 5-year period, respectively. In the field experiment, 50% mixtures at 8- and 12-cm target spacing were also studied. Seedlings from orchard seeds (OS) had in general higher growth rate than seedlings from stand seed (SS). In the nursery experiment, OS were 25% taller, had 41% larger above-soil biomass, and 18% larger root biomass than SS after 2 yea

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6

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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7

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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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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8

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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9

Sunarti, S., A. Nirsatmanto, A. I. Putri, et al. "Development of morphological marker on natural interspecific hybrid seedling of Acacia (Acacia mangium × Acacia auriculiformis) verified by molecular marker." IOP Conference Series: Earth and Environmental Science 1116, no. 1 (2022): 012043. http://dx.doi.org/10.1088/1755-1315/1116/1/012043.

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Abstract Development of the hybridization between two different species of Acacia mangium and Acacia auriculiformis in Indonesia started in 2009 by establishing an open-pollinated orchard to produce the natural Acacia hybrid seed in Wonogiri District, Central Java Province. The design of the orchard was an alternate row between A. mangium and A. auriculiformis with a spacing of 5 × 5 meters. The orchard produced putative Acacia hybrid seeds firstly in 2013. Based on flowering synchronization between the two species, seeds from 38 sample trees of A. mangium were taken to identify their characte

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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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11

Yuskianti, Vivi, and Keiya Isoda. "DETECTION OF POLLEN FLOW IN THE SEEDLING SEED ORCHARD OF Acacia mangium USING DNA MARKER." OURNAL OF FORESTRY RESEARCH 10, no. 1 (2013): 31–41. https://doi.org/10.20886/ijfr.2013.10.1.31-41.

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Pollen pattern dispersal in seedling seed orchard (SSO) is an essential part of a tree-improvement program. Two SSOs of <em>Acacia mangium</em> in South Kalimantan and South Sumatra that represent similar resources in different environments were used in this study.  Genotypes of all trees and seeds from a subset of 10 mother trees in each orchard were determined for 12 microsatellite loci, and parentage analysis was carried out. The results shows that the pollen dispersal pattern in both SSOs decrease with distance from mother tree. Patterns of pollen dispersal, dispersal distance and cum

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12

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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13

Doran, J. C., G. R. Baker, E. R. Williams, and I. A. Southwell. "Genetic gains in oil yields after nine years of breeding Melaleuca alternifolia (Myrtaceae)." Australian Journal of Experimental Agriculture 46, no. 11 (2006): 1521. http://dx.doi.org/10.1071/ea05205.

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A breeding program to enhance the economics of producing essential oil (Australian tea tree oil) from Melaleuca alternifolia plantations in eastern Australia by improving oil yields and oil quality commenced in 1993. This paper reports the results of the first (2003) and second harvests (2004) of a yield trial established by the program in 2002. The trial compares the performance of three grades of seed (clonal seed orchard, first generation seedling seed orchard and selected provenance) released to the industry by the breeding program against an unimproved seedlot (industry standard). Industr

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14

Widyatmoko, A. Y.P.B.C., S. Shiraishi, A. Nirsatmanto, and H. Kawazaki. "THE EFFECT OF INDIVIDUAL SELECTION FOR GENETIC DIVERSITY OF Acacia mangium SEEDLING SEED ORCHARD USING AFLP MARKERS." JOURNAL OF FORESTRY RESEARCH 3, no. 2 (2006): 75–81. https://doi.org/10.20886/ijfr.2006.3.2.75-81.

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Establishment of seed orchard is aimed at producing good quality seeds which is an important activity for breeding program. Seed orchard is also a base population, thus its genetic diversity is depending on its design and composition (provenance, family and individual tree). Selection of an individual tree in seed orchard is needed for the enhancement of  retaining good-character trees. However, selection of individual tree can change the genetic diversity of seed orchard, and the degrees to which the genetic diversity will change depend on the used selection methods. In order to investig

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15

Yue, Guo Zhong, Min Hua Zhao, Guo Jun Zhang, Wan Qi Wang, and Jun Ming Yang. "Seed Germination and Seedling Growth Characteristics of Different Larix principis-rupprechtii Families." Advanced Materials Research 1073-1076 (December 2014): 1112–16. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.1112.

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Phenotypic traits (thousand seed weight and plumpness, etc.), germination characteristics (germination rate and nursery germination rate, etc.), growth traits (seedling height, basal diameter, root length, etc.) and photosynthetic parameters of 8 superior families and 3 controls (seed orchard, seed production stand and planted forest) were measured and analyzed to determine the difference of seed germination and seedling growth among Larix principis-rupprechtii families. Results showed that families 7-46, 8-74 and 1-30 performed excellent in aspects of germination index, nursery germination ra

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16

K., Kartikawati Noor. "FERTILITY VARIATION OF Melaleuca cajuputi subsp. cajuputi AND ITS IMPLICATION IN SEED ORCHARD MANAGEMENT." JOURNAL OF FORESTRY RESEARCH 3, no. 2 (2016): 83–94. https://doi.org/10.20886/ijfr.2016.3.2.83-94.

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Information about fertility variation of flowering trees in seed orchard including determining the quality of seed production and estimating the genetic diversity are still lacking. This paper evaluates fertility variation, effective population size and genetic diversity among cajuput trees in seedling seed orchard at Paliyan, Gunungkidul for optimizing seed orchard management. A total of 160 trees were observed in three flowering periods of 2011-2013. The fertility based on the number of flowers and fruits were registered for each tree at the age of 12, 13 and 14 years. Results show that ther

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17

Kartikawati, Noor K. "FERTILITY VARIATION OF Melaleuca cajuputi subsp. cajuputi AND ITS IMPLICATION IN SEED ORCHARD MANAGEMENT." Indonesian Journal of Forestry Research 3, no. 2 (2016): 83–94. https://doi.org/10.59465/ijfr.2016.3.2.83-94.

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Information about fertility variation of flowering trees in seed orchard including determining the quality of seed production and estimating the genetic diversity are still lacking. This paper evaluates fertility variation, effective population size and genetic diversity among cajuput trees in seedling seed orchard at Paliyan, Gunungkidul for optimizing seed orchard management. A total of 160 trees were observed in three flowering periods of 2011-2013. The fertility based on the number of flowers and fruits were registered for each tree at the age of 12, 13 and 14 years. Results show that ther

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18

Shepard, Emily, Diane Doud Miller, and Gregory Miller. "Effect of Seed Weight on Emergence and Seedling Vigor of Chinese Chestnut." HortScience 24, no. 3 (1989): 516. http://dx.doi.org/10.21273/hortsci.24.3.516.

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Abstract Chinese chestnut (Castanea mollissima Bl.) has much potential as a nut-producing orchard or landscape tree, being resistant to chestnut blight [Endothia parasitica (Murr.) P.J. & H.W. Anderson] and high-yielding. Chestnut is monoecious and largely self-sterile, requiring cross-pollination to produce nuts (Sanders, 1974). There is considerable variation in nut traits, such as size and sugar content, even among nuts from the same tree (Miller, 1987), due to, in part, xenia effects. The nut is composed mostly of cotyledonary tissue with a small embryo and no endosperm (Sanders, 1974)

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19

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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20

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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Dalgleish, Harmony J., John T. Shukle, and Robert K. Swihart. "Weevil seed damage reduces germination and seedling growth of hybrid American chestnut." Canadian Journal of Forest Research 42, no. 6 (2012): 1107–14. http://dx.doi.org/10.1139/x2012-067.

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Seed predation by weevils (Coleoptera: Curculionidae) has been implicated as a limiting factor in oak recruitment throughout eastern US forests. We examined the effects of weevil seed predation on American chestnut (Castanea dentata (Marsh.) Borkh.). Although an introduced pathogen eradicated sexually reproducing populations of American chestnut in the early 1900s, the recent development of a blight-resistant hybrid makes reintroduction feasible. We nondestructively assessed the amount of weevil damage to seeds using X-ray imagery and traditional float test methods in American and blight-resis

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Kartikawati, Noor Khomsah, and Sumardi Sumardi. "Crossing potential of open pollination in Cajuputi seedling seed orchard at Paliyan, Gunungkidul." Jurnal Penelitian Kehutanan Wallacea 6, no. 1 (2017): 41. http://dx.doi.org/10.18330/jwallacea.2017.vol6iss1pp41-51.

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There are two possibilities on open pollination: cross pollination and self pollination. This research was aimed to identify cross pollination potential within and among provenance, and to determine the flowering behavior of each provenance in seedling seed orchard of cajuputi at Paliyan, Gunungkidul. The research was conducted based on flowering phenology (start of flowering, end of flowering and duration of flowering in one period) for all flowering trees during two flowering periods. The result showed that there was high crossing potential in seedling seed orchard of cajuputi based on flowe

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23

Cherry, Marilyn L., and Yousry A. El-Kassaby. "Growth, morphology, and cold hardiness of Chamaecyparis nootkatensis seedlings originating from an abbreviated reproductive cycle." Canadian Journal of Forest Research 32, no. 1 (2002): 52–58. http://dx.doi.org/10.1139/x01-167.

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A common garden study investigated growth, morphology, and cold hardiness of yellow-cedar (Chamaecyparis nootkatensis (D. Don) Spach) seedlings originating from seed that had matured at an accelerated rate. This early maturing seed, produced at a low-elevation southern Vancouver Island seed orchard, was known to have similar germinability and seedling morphology as high-elevation normally maturing seeds. Population differences in 3-year-old seedlings were evident only in shoot harvest index (ratio of stem/shoot dry weight). The amount of stem elongation that occurred prior to the formation of

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24

Roth, Brian E., and Michael Newton. "Survival and Growth of Douglas-Fir Relating to Weeding, Fertilization, and Seed Source." Western Journal of Applied Forestry 11, no. 2 (1996): 62–69. http://dx.doi.org/10.1093/wjaf/11.2.62.

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Abstract The goal of this study was to quantitatively evaluate the individual and interactive effects of weed control, nitrogen fertilization, and seed source on Douglas-fir (Pseudotsuga menziesii) survival and growth in a range of sites and growing conditions in western Oregon. Weed control was the dominant factor influencing seedling survival and growth and accounted for 49% of the explained variation in seedling volume after 2 yr. Nitrogen fertilization had no effect when used in conjunction with weed control and a negative effect when used without weed control. Seedlings from a seed orchar

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25

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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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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Yuniarti, Naning, Megawati Megawati, and Budi Leksono. "The effect of method and germination paper substrate on viability of Eucalyptus pellita F. Mull seed." Jurnal Penelitian Kehutanan Wallacea 6, no. 1 (2017): 13. http://dx.doi.org/10.18330/jwallacea.2017.vol6iss1pp13-19.

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Improper seed handling of Eucalyptus pellita will reduce seed quality, so as to improve the viability of the seed proper handling techniques are needed. To investigate the seed germination potency as a result of seed handling germination seed tests are needed. The purpose of this study was to examine the effect of germination method and paper substrate on the viability of E. pellita seeds. Seeds used in this study were from seedling seed orchard in South Sumatra, South Kalimantan, and Riau. Seed germination methods used in the laboratory tests were method of top paper and between paper tests,

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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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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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Bhagta, Shikha, H. Sankhyan, Sanjeev Thakur, Rohit Bishist, and R. Gupta. "Evaluation of Seedling Seed Orchard of Grewia optiva Drummond for Morphometric and Fodder Quality Parameters." Journal of Non Timber Forest Products 26, no. 4 (2019): 179–84. http://dx.doi.org/10.54207/bsmps2000-2019-uta0o3.

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Forty half sib progenies in open pollinated seedling seed orchard of Grewia optiva Drummond were evaluated for morphometric and fodder quality traits. The analysis of variance indicated highly significant differences among the various half sib families for all the traits. The experimental results revealed that out of 40 families, ten families viz., SI-15, SO-3, HA-2, HA-3,HA-4,SO-7,SH-7,SO-4,SI-6 and SI-14 were found superior on the basis of overall mean performance for all quantitative and qualitative traits under study. Hence, these ten half sib families in the seedling seed orchard can be u

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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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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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El-Kassaby, Y. A., and A. J. Thomson. "Parental Rank Changes Associated with Seed Biology and Nursery Practices in Douglas-Fir." Forest Science 42, no. 2 (1996): 228–35. http://dx.doi.org/10.1093/forestscience/42.2.228.

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Abstract The impact of container-nursery management practices on the genetic composition of seedling crops was evaluated in an experimental study designed to determine the cumulative effects of: (1) differences in parental reproductive output in bulk seedlots, (2) parental variation in germination parameters (percent and speed), and (3)the interaction of these parameters with container-nursery practices of thinning and culling, and their effect on the genetic representation of parents in the resultant seedling crops. Results from the experimental study were compared to predictions of a stochas

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Annapurna, D., T. S. Rathore, and P. V. Somashekhar. "Impact of Clones in a Clonal Seed Orchard on the Variation of Seed Traits, Germination and Seedling Growth in Santalum album L." Silvae Genetica 54, no. 1-6 (2005): 153–60. http://dx.doi.org/10.1515/sg-2005-0023.

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Summary Clonal Seed Orchard (CSO) of Santalum album L. at Nallal, India consisting of 25 clones originated from different agro-climatic conditions of four southern states (Karnataka, Tamil Nadu, Kerala and Andhra Pradesh) was source of seeds for variability studies. There was vast variation in seed size, weight, germination, vigour and seedling growth of different clones over the years. Seed length, width and weight were positively correlated to each other but seed size had no effect on germination, Germination Value (GV), days taken for germination and early seedling growth. Effects of Clones

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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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Nirsatmanto, Arif. "GENETIC VARIATION OBSERVED IN COMPOSITE SEEDLING SEED ORCHARD OF Acacia mangium Willd. AT CENTRAL JAVA, INDONESIA : IMPLICATIONS FOR INCREASING GENETIC GAIN AND SEED PRODUCTION." JOURNAL OF FORESTRY RESEARCH 9, no. 2 (2012): 91–99. https://doi.org/10.20886/ijfr.2012.9.2.91-99.

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As part of multiple-population breeding scheme using sub-lining system, a composite seedling seed orchard of was established at Central Java, Indonesia. The orchard comprises a combination of the best 40 plus tree families selected from four sub-lines in the first-generation of Acacia mangium progeny trial. The design of orchard is randomized complete block laid-out as four line tree-plot of six replications with a spacing of 2 x 4 meter. Variation among sub-lines and families within sub-line, and genetic parameters for height, dbh and volume were investigated at age of 24 months. The aim of t

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Sijacic-Nikolic, Mirjana, and Vasilije Isajev. "Model of experimental clonal seed orchard for the production of Serbian spruce sPicea omorika /Panc./Purkyne) intraspecific hybrids." Genetika 34, no. 1 (2002): 11–19. http://dx.doi.org/10.2298/gensr0201011s.

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The presented model for the establishment of an experimental clonal seed orchard of Serbian spruce was designed based on the results of the analysis and assessment of the genetic potential of Serbian spruce seedling seed orchard at Godovik. Based on the results of the analyses, eight superior half-sib lines of Serbian spruce were selected, of which 24 genotypes were selected. Their hybridisation, by the model of incomplete diallel cross resulted in 21 combinations at the level of half-sib lines, i.e. 48 combinations at the level of parent genotypes. The applied study methods identified the pot

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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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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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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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Kriebel, Howard B. "Genetic improvement of sugar maple for high sap sugar content. I. Clone selection and seed orchard development." Canadian Journal of Forest Research 19, no. 7 (1989): 917–23. http://dx.doi.org/10.1139/x89-139.

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A grafted seed orchard of Acersaccharum Marsh, was established in Ohio in 1957 as part of a program of genetic improvement of sugar yield. During the 3rd decade, the orchard trees averaged 4.2% sap sugar. Although environmental sources of variance in sugar concentration were large, clonal differences were evident and generally consistent over the years; the clone × year interaction was negligible. Sap sugar concentration varied from year to year, but after an increase coinciding with early crown development in the 1st decade, there was no upward or downward trend with age. Inclusion of one see

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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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Hawkins, C. DB, and K. B. Shewan. "Frost hardiness, height, and dormancy of 15 short-day, nursery-treated interior spruce seed lots." Canadian Journal of Forest Research 30, no. 7 (2000): 1096–105. http://dx.doi.org/10.1139/x00-055.

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Fifteen seed lots, five each from natural-stand, seed-orchard, and full-sib collections, of interior spruce (Picea glauca (Moench) Voss, Picea engelmannii Parry ex Engelm., and their naturally occurring hybrids) were sown in February 1993. One half of each seed lot received an ambient photoperiod (control) treatment, while the other half got a blackout (short-day) treatment. All seedlings were grown under ambient photoperiod except during the 17 days of blackout. Frost hardiness assessments were done between July and May. Blackout treatment was effective in regulating height and promoting fros

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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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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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Sijacic-Nikolic, Mirjana, and Vasilije Isajev. "Assessment of heterotic effect in serbian spruce hybrid combinations." Genetika 36, no. 3 (2004): 257–63. http://dx.doi.org/10.2298/gensr0403257s.

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The occurrence and magnitude of heterotic effect was determined among hybrid combinations and parent individuals obtained by open pollination in Serbian spruce seedling seed orchard at Godovik. The heterotic effect was analysed for cone length and width and the average number of seeds per cone. The study results show the different heterotic effect, both for the same trait in different hybrid combinations and for different traits of the same hybrid.

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Roth, Brian E., and Michael Newton. "Role of lammas growth in recovery of Douglas-fir seedlings from deer browsing, as influenced by weed control, fertilization, and seed source." Canadian Journal of Forest Research 26, no. 6 (1996): 936–44. http://dx.doi.org/10.1139/x26-103.

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This study examined the effects of weed control, nitrogen fertilization, and seed source on lammas growth (second flushing) in Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) seedlings. It also assessed the occurrence of deer browsing as related to these silvicultural treatments and examined the role of lammas growth in seedling recovery and escapement from deer browsing. Weed control significantly increased the occurrence of lammas growth, presumably because of greater soil moisture and nutrient availability. Nitrogen fertilization decreased lammas growth significantly, at least in part by

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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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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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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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Kraus, John F. "Breeding Shortleaf × Loblolly Pine Hybrids for the Development of Fusiform Rust-Resistant Loblolly Pine." Southern Journal of Applied Forestry 10, no. 4 (1986): 195–97. http://dx.doi.org/10.1093/sjaf/10.4.195.

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Abstract A fusiform rust-resistant strain of loblolly pine (Pinus taeda L.) is being developed by interspecific hybridization with shortleaf pine (P. echinata Mill.). Backcrosses of the hybrid to loblolly pine have early height growth equal to loblolly pine and retain a high level of fusiform rust resistance. Previous breeding results are reviewed and updated, and new data from a developing hybrid seedling seed orchard are presented. Breeders are encouraged to develop their own hybrid programs for production of rust-resistant seedlings. South. J. Appl. For. 10:195-197, Nov. 1986.

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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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., Supriyanto, and Taufik Iskandar. "PENILAIAN KESEHATAN KEBUN BENIH SEMAI Pinus merkusii DENGAN METODE FHM (FOREST HEALTH MONITORING) DI KPH SUMEDANG Health Assessment for Seedling Seed Orchard of Pinus merkusii Using FHM (Forest Health Monitoring) Method in KPH Sumedang." Journal of Tropical Silviculture 9, no. 2 (2019): 99–108. http://dx.doi.org/10.29244/j-siltrop.9.2.99-108.

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Pine (Pinus merkusii) is tree species that provides timber and gum rosin. To meet the needs of wood and non wood (gum rosin) products, planting by using superior or high quality seeds are needed. Seed procurements for planting are obtained from seedling seed orchard (SSO). However, Cijambu’s SSO was attacked by pine woolly aphid (Pineus boerneri). Therefore, assessment of Cijambu’s SSO needs to be done to evaluate the severity pest attacks that could affect to the quality and the quantity of seed production. Forest Health Monitoring (FHM) method is one of the methods to assess the health level

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