Study on the genetic structure in Pinus massoniana (Masson pine)populations

摘要

The result of isozyme analyses in the six natural populations of Masson pine (Pinus massoniana LAMB.) showed that the level of genetic variation in the population is relatively high. The proportion of polymorphic loci is 76.2%, the average number of alleles per locus is 2.39, the effective number of alleles per locus is 1.62, and average expected heterozygosity is 0.2730. On the other hand, the genetic differentiation between the populations is very low (G(ST) = 0.017, D = 0.011 +/- 0.005); about 98% of the total genetic variation comes from the individuals within the populations. The genetic variation between the different populations is about 2%, and mainly originates from one third of the gene loci. The population sampled is almost a single panmictic unit, with most loci are in Hardy-Weinberg equilibrium, some degrees of inbreeding in some loci.