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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。
Cunninghamia lanceolata is the main afforestation species in south China. It is widely distributed, fast growing, good in material and high in output, occupying an important position in wood production. However, few studies have been done on the genetic variation of Chinese fir sources. Chen Yuewu et al. (1980) reported the genetic variation of 11 Chinese fir sources. Isoenzyme is one of the effective measures of genetic variation in natural populations of trees, and can also be used as an index to study the genetic relationship and origin of trees. J-ch. Yang et al. (1977) studied the variations of esterase, leucine aminopeptidase and aspartate aminotransferase isozymes in nine locations of Douglas-fir from Vancouver Island to California. Japanese forestry pilot site Kyushu branch (1980) tested in different regions of Japanese cypress peroxidase, esterase isoenzyme. Peroxidase isozymes were used to compare genetic variations between origins. In this paper, the results of the analysis of the esterase isozymes of 63 Chinese fir sources in 14 provinces (districts) across the country were compared to give our opinion on the genetic diversity centers and geographic origins of Chinese fir.