+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Genetic diversity, differentiation, and inbreeding in Pacific yew from British Columbia

Genetic diversity, differentiation, and inbreeding in Pacific yew from British Columbia

Journal of Heredity 85(2): 112-117

Variation at 21 allozyme loci in Pacific yew (Taxus brevifolia Nutt.) from nine disjunct regions, representing three geographic areas of British Columbia, was measured to estimate the amount and pattern of genetic variability. Pacific yew has moderate levels of genetic diversity compared to that present in associated temperate-zone species, with 1.7 average number of alleles per locus, 42.3% polymorphic loci, and 0.166 mean expected within-region heterozygosity. Among-region genetic differentiation accounted for a significant 8% of the total variation. High gene flow (N-m = 2.99) was observed, and it is argued that the primary cause is seed, rather than pollen, subsequently producing low among-region and high within-region genic differentiation. Wright's gene fixation index, F, averaged 0.472, indicating the presence of high levels of inbreeding. Nei's genetic distances (D) among regions from the same geographic area averaged 0.004, which was significantly lower than the average among regions from different geographic areas (0.021), producing close agreement between genetic relationships and geography. The high levels of inbreeding detected may be attributable to both the ecology and reproductive strategies of the species.

(PDF 0-2 workdays service: $29.90)

Accession: 002390789

Download citation: RISBibTeXText

Related references

Genetic diversity and gene conservation of Pacific silver fir (Abies amabilis) on Vancouver Island, British Columbia. Forest Genetics 4(2): 85-98, 1997

Genetic diversity, differentiation and mating system in mountain hemlock (Tsuga mertensiana) across British Columbia. Forest Genetics 7(2): 97-108, 2000

Genetic variation of Pacific yew in British Columbia and its conservation. Baradat, P, Adams, W T, Mueller-Starck, G Population genetics and genetic conservation of forest trees 227-235, 1995

Workshop on Possible Pathways of Cadmium into the Pacific Oyster as Cultured on the Coast of British Columbia, Sidney, British Columbia, Canada, March 6-7, 2001. Canadian Technical Report of Fisheries & Aquatic Sciences (2405): 21-56, 2002

Intact genetic structure and high levels of genetic diversity in bottlenecked sockeye salmon (Oncorhynchus nerka) populations of the Fraser River, British Columbia, Canada. Canadian Journal of Fisheries and Aquatic Sciences 57(10): 1985-1998, 2000

Genetic differentiation, diversity, and inbreeding in the mountain monkeyflower (Mimulus caespitosus) of the Washington Cascades. Canadian journal of botany = Journal canadien de botanique 67(7): 2017-2024, 1989

Genetic differentiation diversity and inbreeding in the mountain monkeyflower mimulus caespitosus of the washington cascades usa. Canadian Journal of Botany 67(7): 2017-2024, 1989

Levels of genetic diversity at different stages of the domestication cycle of interior spruce in British Columbia. Tag. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik 94(1): 83-90, 1997

Taxonomic synopsis of invasive and native Spartina (Poaceae, Chloridoideae) in the Pacific Northwest (British Columbia, Washington and Oregon), including the first report of Spartina Ă—townsendii for British Columbia, Canada. Phytokeys: 25-82, 2012

Genetic diversity and genotypic differentiation between the sexes in swarm aggregations decrease inbreeding in the Formosan subterranean termite. Insectes Sociaux ; 53(2): 212-219, 2006

Protocol for rating seed orchard seedlots in British Columbia: quantifying genetic gain and diversity. Forestry Oxford 77(4): 297-303, 2004

Genetic diversity of bluebunch wheatgrass (Pseudoroegneria spicata) in the Thompson River valley of British Columbia. Canadian Journal of Botany 84(7): 1122-1128, 2006

Genetic patterns of differentiation among five landbird species from the Queen Charlotte Islands, British Columbia. Auk 125.2, 2008

Genetic diversity and population structure of Valdensinia heterodoxa, a potential biocontrol agent for salal in coastal British Columbia. Canadian Journal of Plant Pathology 27(4): 559-571, 2005

Genetic differentiation of subpopulations of sockeye salmon within lakes of Alaska, British Columbia, and Kamchatka, Russia. Canadian Journal of Fisheries & Aquatic Sciences 51(SUPPL 1): 147-157, 1994