Schat Henk, Vooijs Riet, Kuiper Eric
Department of Ecology and Ecotoxicology, Faculty of Biology, Vrije Universiteit, De Boelelaan 1087, 1081 HV, Amsterdam, The Netherlands.
Evolution. 1996 Oct;50(5):1888-1895. doi: 10.1111/j.1558-5646.1996.tb03576.x.
Heavy metal tolerant Silene vulgaris plants, originating from different metalliferous sites in Germany and one in Ireland, were crossed to each other and to nontolerant plants from a nonmetalliferous site in The Netherlands. Analysis of the crosses suggested that there were two distinct major gene loci for zinc tolerance among a total of five tolerant populations. The tolerance loci for zinc, copper, and cadmium in the Irish plants were shown to be identical with those in the German populations. It is argued that the occurrence of common major genes for tolerance among different geographically isolated populations must have resulted from independent parallel evolution in local nontolerant ancestral populations. Each of the tolerances studied seems to be controlled by only a few specific major genes.
源自德国不同金属矿区以及爱尔兰一个金属矿区的耐重金属蝇子草植物，相互之间进行了杂交，并与来自荷兰一个非金属矿区的非耐重金属植物进行了杂交。对杂交后代的分析表明，在总共五个耐重金属种群中，存在两个不同的主要锌耐受基因位点。爱尔兰植物中锌、铜和镉的耐受位点与德国种群中的相同。有人认为，不同地理隔离种群中存在共同的主要耐受基因，必定是由当地非耐受祖先种群的独立平行进化导致的。所研究的每种耐受性似乎都仅由少数几个特定的主要基因控制。
