马尾松天然群体的遗传结构

本文运用同工酶电泳技术对马尾松天然群体的遗传结构进行了研究,分析了6个群体3个酶系统(GOT、MDH和GOH)的12个位点。结果表明:马尾松群体具有较高的变异水平;群体内杂合体不足,纯合体过量,处于非平衡状态;马尾松群体的分化程度较低,大部分变异存在于群体内,群体间仅占一小部分;群体的分化与地理距离的隔离没有明显的关系;广西种群与福建、广东和贵州种群闻的遗传分化明显。此外,文章中还对马尾松遗传改良的策略提出了建议。

GENETIC STRUCTURE OF NATURAL POPULATION IN MASSON PINE

We have studied genetic structure of natural population in masson pine (Pinus massoninan Lamb) using isozyme clcctronphorsis method. 12 loci of 3 enzyme systems (GOT, MDH and GDH) of seed endosperm samples coming from 6 populations were analysed. The results were as follows: the level of genetic varibility in the population of masson pine was relatively high. There were excesses of homozygotcs and deficiencies of hctcrozygotcs within population.Masson pine populatoin wasn't under Hardy-Wcinbcrg equilibrium. The differentiation level of masson pine was relatively low. About 9% gene diversity was attributed to the differentiation intcrpopulation while ninety-one percent of the total gene diversity resided within population. The relationship between geographic distance and genetic distance of population appeared to be weak. There was significant heterogeneity difference among three populations of Guangxi and populations Guangdong, Fujian and Guizhou. In this paper, the author also suggests the strategy of masson pine genetic improvement.