Genetic variation among natural Abies sachalinensis population in relation to environmental gradients in Hokkaido, Japan
1997
Nagasaka, K. (Forestry and Forest Products Research Inst., Sapporo (Japan). Forest Genetics Laboratory) | Wang, Z.M. | Tanaka, K.
We studied genetic variation among 18 natural populations of Abies sachalinensis (Masters) in Hokkaido, Japan by polyacrylamide gel electrophoresis. Data from four polymorphic loci with 15 alleles in three enzyme systems were analyzed. Mean number (Ap) and mean effective number (Ne) of alleles per locus, percent polymorphic loci, and observed and expected heterozygosities were 3.04, 1.19, 77.78 % (0.99 criterion), 0.143 and 0.157, respectively. Diversity among the populations was small with a mean FST 0.015 and genetic distance 0.0017. However, x2-test showed that allele frequencies were different (p0.05) at two of the four polymorphic loci. He, Ne, cluster and canonical discriminant analyses detected an east-west variation pattern among the populations with the same exceptional populations to this cline. These exceptions were considered population-specific genetic variation. Multiple regression analyses revealed that frequencies of nine of the 15 alleles were significantly related with some of the geographic and climatic parameters studied. Such variations related to population origins and environmental gradients are in congruence with previous studies in ecophysiological and morphological traits for the same species in the same area
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