2001•Yunnan Daxue xuebao. Shehui kexue banRequires access

Study on the Genetic Structure and Genetic Diversity of Pinus kesiya var.langbianensis Seed Orchard

Shaoyu Chen

Abstract

The genetic structure and genetic diversity of seed orchard of Pinus kesiya var.langbianensis has been studieded via alle-isozyme analysis of the four populations in the orchard.The analysis on 16 loci coding for 9 isozymes shows the percentage of polymorphic loci of the orchard is 73.5%,the average number of alleles per locus is 2.42,the effective number of allele per locus is 1.54,and the average expected and observed heterozygosity is 0.295 and 0.181 respectively.The results implied a quite wide genetic basis and rich genetic diversity in the seed orchard,and the establishment of the seed orchard is an effective way of genetic improvement for Pinus kesiya var.langbianensis.

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Key concepts: Seed orchard, Genetic diversity, Locus (genetics), Biology, Loss of heterozygosity, Orchard, Allele, Genetic distance