天目山银杏群体遗传变异的同工酶分析

Isozyme analysis of the genetic variation of Ginkgo biloba L.population in Tian-Mu Mountain

本文利用同工酶电泳方法,研究了天目山银杏群体的遗传变异性,计算了4种同工酶(GDH,G-6PDH,PRX,SDH)8个位点上的等位基因频率和每个位点的平均杂合率。结果表明:天目山银杏群体的遗传变异性较小,各位点的平均杂合率仅为0.150±0.004,呈现较大程度的遗传同一性,因此认为天目山银杏很可能是僧人在寺庙旁栽植的银杏留下的后代。

The genetic variation of Ginkgo biloba L. population in Tian-Mu Mountain was studied by means of isozyme analysis. Forty trees were sampled from the population as representatives. Allele frequency at eight loci of four isozymes (GDH,G-6PDH,PRX,SDH) and average heterozygosity per locus were calculated. The average heterozygosity of 0. 150±0. 004 per locus indicated that there were less genetic variation and greater genetic identity in Ginkgo biloba L. population of Tian-Mu Mountain. It is considered that the trees are very likely the offspring of plants that were cultivated in the vicinity of the old temple by resident monks.