【摘要】 <正>杉木是我国南方的主要造林树种,分布广,生长快,材质好,产量高,在木材生产中占有重要地位。但是对杉木种源遗传变异的研究很少。陈岳武等(1980)报道了杉木11个产地的遗传变异。同工酶是衡量林木天然群体中遗传变异有效的方法之一,亦可作为研究树木亲缘关系及起源的一个指标。J-ch·Yang等(1977)研究了从温哥华岛至加利福尼亚一线的花旗松9个产地的酯酶、亮氨酸氨肽酶和谷草转氨酶同工酶的变异。日本林业试验场九州支场(1980)检验了不同产地的日本扁柏的过氧化物酶、酯酶等同工酶。利用过氧化物酶同工酶比较了产地间的遗传变异。 本文对全国14个省(区)63个杉木种源酯酶同工酶的分析结果进行比较,从而对杉木的遗传多样性中心及地理起源,提出了我们的看法。更多还原

【Abstract】 Samples of 63 seed sources from all the distributed areas of Chinese fir were collected at random and examined. The methods for esterase pattern segregation and development were modified in accordance with Mayberry’s. The results observed were as follows:1. The esterase patterns of 63 seed sources of Chinese fir examined can be divided into seven types of variations. It seems that the variations in ester ase patterns reflect and represent the genetic variations of the trees.2. There is a certain dominant specific type of isozyme in each main centre of culture and the variation of isozymes types tends to be simplified. On the other hand there are more variations of patterns of esterase isozymes in the scattered culture areas. The west and southwest part of Sichuan province, the southeast part of Yunnan province are centres of genetic polymorphism of Chinese fir which might be among the places where Chinese fir originated.更多还原