马尾松种子园及其附近人工林的亲子代群体遗传结构分析

Comparison of Genetic Structure between Parents and Progeny from a Masson Pine Seed Orchard and a Plantation Nearby

利用同工酶标记对广西覃塘林场马尾松无性系种子园及其附近一人工林的亲子代群体遗传结构进行研究。研究结果表明，不论是种子园还是附近人工林均表现为：亲代群体处于遗传平衡状态，杂合体相对过量，但子代已偏离遗传平衡，杂合体相对不足，亲子代的基因频率变化不大。种子园亲代群体的遗传多样性略高于子代，而附近人工林的亲代群体遗传多样性略低于子代。本文研究的种子园具有较宽的遗传基础，该种子园附近人工林的遗传多样性与种子园接近，但不论是人工林本身还是它的子代其多样性平均水平都较种子园的亲代和子代略低。

Genetic structure of parents and their progeny from a masson pine clonal seed orchard and a plantation near the orchard in Guigan,Guangxi Province was studied with isozyme markers.The results showed that for both the seed orchard and the plantation near the seed orchard,the parental populations did not deviate from the Hardy Weinberg Equilibrium significantly with excess of heterozygots,the progeny populations had the opposite case,i.e. diveating from the Equilibrium significantly with excess of homozygots. There was a small difference in gene frequencies between the parents and their progeny.Progeny of the seed orchard got a little lower gene diversity than that of its parental population,while the progeny of the plantation near the seed orchard got a little higher gene diversity than that of its parents. The genetic base of the seed orchard was fairly wide. Although both parents and offspring from the plantation near the seed orchard held relatively lower gene diversities than those from the seed orchard, the difference between them was very small.