Genetic structure and mating system of white spruce (<i>Picea</i><i>glauca</i>) in a seed production area

King, John; Dancik, Bruce P.; Dhir, N. K.

doi:10.1139/x84-115

Cited by 39 publications

(20 citation statements)

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“…A heterozygote surplus both in embryos (F = -0.066) and maternal plants (F = -0.074) was reported for Picea glauca (Moench) Voss in Ontario, Canada (Cheliak et al 1985). In a population of this species in Alberta, Canada, heterozygote deficiency was observed in adults (F = 0.039) and in embryos from two different seed crop years (F = 0.029-0.031) (King et al 1984). Krzakowa and Korczyk (1995) studied a population of Norway spruce with individuals aged from 35 to 240 years old in the Białowie_ za Primeval Forest, and reported a slight excess of homozygotes (mean of 11 allozyme loci F = 0.062) and a higher mean observed heterozygosity value (H o = 0.237) than those determined in the present study (H o = 0.081-0.120).…”

Section: Discussionmentioning

confidence: 89%

Genetic aspects of age dynamics of a natural Picea abies (L.) Karst. population in the Białowieża Primeval Forest, Poland

et al. 2013

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We studied temporal changes in the genetic structure and diversity of a naturally regenerated Picea abies (L.) Karst. (Norway spruce) population in the Białowie_ za Primeval Forest, Poland. The analysis included five age classes of trees: newly germinating seedlings (in laboratory conditions), seedlings up to 3 years old, young trees 4-10 years old, middle-aged trees 11-100 years old, and trees older than 100 years. We conducted genetic analyses of 26 allozyme loci using dormant buds from 405 individuals and 100 embryos. The results showed that the naturally regenerating Norway spruce population is genetically heterogeneous across the studied age classes. As determined by Chi squared tests, there were statistically significant differences in frequencies of alleles and genotypes as well as Wright's index values (F) among the five age classes. The level of genetic differentiation (pairwise F ST = 0.5-2.3 %) among the age class groups was equal to levels previously determined for various populations of this species. The Ewens-Watterson test for neutrality showed that one or two loci across different age classes of Norway spruce were affected by the selection process. The distinctiveness of embryo and seedling classes was confirmed by the number of detected alleles, the number of private alleles, the level of observed heterozygosity, and Wright's index value. The results obtained in the present study indicate there are interesting dynamics of adaptation processes occurring in the natural age-diverse population of Norway spruce in the Białowie_ za Primeval Forest.

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Section: Discussionmentioning

confidence: 89%

Genetic aspects of age dynamics of a natural Picea abies (L.) Karst. population in the Białowieża Primeval Forest, Poland

et al. 2013

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“…Single- Table 5 Single-locus (1) and multilocus (t,,,) estimates with locus estimates showed significant departure from complete outcrossing (t = 1.0) only at the Pgm-1 locus. Differences among single-locus outcrossing estimates have been reported for several coniferous species (Moran etaL, 1980;El-Kassaby etaL, 1981; Mitton et a!., 1981; Shaw and Allard 1982a; Epperson and Allard 1984;King et a!., 1984;Ritland and El-Kassaby, 1985). This observed variation is an inherent problem of all single-locus estimates due to their sensitivity to any violation of the assumptions of the mixed-mating model (Fyfe and Bailey, 1951;Brown and Allard, 1970;Ennos and Clegg, 1982;Brown et a!., 1984).…”

Section: Enzyme Description and Inheritancementioning

confidence: 94%

“…To obtain reliable values of genetic parameters from such trials, the parents should be unrelated, should be good outcrossers and should have produced progeny equally derived from many pollen parents (Namkoong, 1966). However, relatedness and natural inbreeding have been reported for several conifers (El-Kassaby eta!., 1981; Park and Fowler, 1982;Shaw and Allard, 1982a;Roberds and Conkle, 1984), including temporal variation in the same stand (King et al, 1984;Cheliak et al, 1985). Hence, quantitative assessment of the outcrossing rates should be an integral part of any study of selection in plant populations (Ennos, 1981).…”

Section: Introductionmentioning

confidence: 99%

Allozyme inheritance, heterozygosity and outcrossing rate among Pinus monticola near Ladysmith, British Columbia

et al. 1987

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Analysis of megagametophytic and embryonic allozyme variants in nine enzymatic systems encoded by 14 loci was conducted on 30 western white pine (Pinus monticola Doug!.) trees from a natural stand on Vancouver Island, B.C. The segregation of allozymes in megagametophytes of heterozygous trees indicated distinct, simple, Mendelian inheritance. The stand heterozygosity parameters (proportion of polymorphic loci (0.64), average number of alleles per locus (1.79), and average expected heterozygosity (0.18)) were identical to those reported from a broadly-based survey of the species (Steinhoff et al., 1983). Comparison of progeny (viable embryo) and parental genotypic distributions indicated a major genetic shift between the two life-cycles phases. Among the progeny, heterozygotes occurred less frequently than expected under panmixia, while the reverse was observed for the parental population. Single-locus estimates of outcrossing rate varied between 0.751 and 1.043 and were significantly heterogeneous. Comparison between the single-locus estimates and the multilocus estimate (0.977) of outcrossing rates indicated that most of the inbreeding detected was due to consanguineous matings, rather than selfing. This form of inbreeding was consistent with the clustering of genotypes in the stand. Single-tree estimates of outcrossing rate varied considerably among trees and ranged between 0.682 and 1.207, indicating that some trees might possess high self compatibility and tolerate high selfing, or that violation of mixed-mating assumptions occurred. The implications of the apparent inbreeding on the derivation of genetic estimates from open-pollinated seeds and on seed crops for production plantations are discussed.

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“…It is difficult to draw an informed decision on white spruce since we tested only one seed lot. The genetic variability of these species, suggests that emphasis be placed on intra-population sampling for both white spruce (King et al, 1984;Cheliak et al, 1985;Innes and Ringius, 1990) and aspen (Cheliak and Dancik, 1982;Hyun et al, 1987). Thus, it is worth testing more seed lots and families within-seed lots of these species to find the best suitable ones for CT revegetation.…”

Section: Dry Matter Production and Survivalmentioning

confidence: 99%

Genetic variability in salt tolerance of selected boreal woody seedlings

Khasa

Hambling

Kernaghan

et al. 2002

Forest Ecology and Management

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In order to select woody plant candidates suitable for revegetation of saline-alkaline soils, we tested selected woody plant species and seed lots: Pinus contorta (lodgepole pine), Pinus banksiana (jack pine), Picea glauca (white spruce), Populus tremuloides (trembling aspen), and Alnus rubra, syn. Alnus oregona (red alder). Pre-germinated seedlings were grown for 4 weeks in a greenhouse in a semi-hydroponic system containing 1/2 strength Hoagland solution with additional sodium concentrations (0, 25, 50, 75 mM) and composite tailings release water. A significant interaction between salt treatments and seed lots within plant species as well as between salt treatments and plant species was observed for weight and necrosis, indicating that the plant genotype responded differently to salt treatments. Of all examined woody plant species, jack pine (Syncrude seed source) exhibited the highest percent survival followed by white spruce (Syncrude seed source), red alder (seed lot No. 40457), and lodgepole pine (seed lot No. 7960007). Proportionately ranked means for dry biomass production showed lodgepole pine (seed lot No. 7960007) with the greatest biomass followed by aspen (seed lot No. Syncrude), red alder (seed lot No. Port Renfrew), jack pine (seed lot No. 8960049) and white spruce (Syncrude seed source). The best performing seed lots based on aggregation index which combines both the percent survival and dry weight averages were: red alder (seed lot Nos. 40457 and 45958), aspen (Syncrude seed source), jack pine (Syncrude seed source), lodgepole pine (seed lot No. 7960007). Based on variance components, most of the variation was explained by the treatment and seed lot effects. This reveals the importance of intra-specific variability and that selection should be based not only on inter-specific variation but also on the intra-specific variation for the development of salt-tolerant lines to be used in reclamation of saline habitats. #

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Genetic structure and mating system of white spruce (Piceaglauca) in a seed production area

Cited by 39 publications

References 0 publications

Genetic aspects of age dynamics of a natural Picea abies (L.) Karst. population in the Białowieża Primeval Forest, Poland

Genetic aspects of age dynamics of a natural Picea abies (L.) Karst. population in the Białowieża Primeval Forest, Poland

Allozyme inheritance, heterozygosity and outcrossing rate among Pinus monticola near Ladysmith, British Columbia

Genetic variability in salt tolerance of selected boreal woody seedlings

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