GENETIC-BASIS OF DIFFERENCES IN GENITAL MORPHOLOGY AMONG THREE SIBLING SPECIES OF DROSOPHILA
GENETIC-BASIS OF DIFFERENCES IN GENITAL MORPHOLOGY AMONG THREE SIBLING SPECIES OF DROSOPHILA
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DOI：
10.1111/j.1558-5646.1983.tb00225.x
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发表时间：
1983-01-01
期刊：
影响因子：
3.3
通讯作者：
COYNE, JA
中科院分区：
文献类型：
--
作者：
COYNE, JA
3个姊妹种D. melanogaster、黑腹杜父鱼D. simulans和D.本文研究了毛叶兰（Mauritiana）与毛叶兰（Mauritiana）在雄性生殖弓后突形状上的差异，并对这一差异的遗传基础进行了探讨。对D.黑腹果蝇D. simulans和D. simulans/拟谷盗D. maurifiana。前一对染色体至少有4个影响性状的基因替换，每个染色体对生殖突区域有显著影响。后一对物种的亲缘关系更近，至少有5个影响性状的替换，其中至少有1个占据X染色体和每个常染色体臂。在这两个比较中，发现了用所用技术可以检测到的最大数量的基因替换。由于物种之间的测量分歧是真实分歧的最小估计，显然，两个比较中的性状差异具有多基因基础。这些结果，以及其他研究的结果，并不支持目前的理论，即区分物种的基因和区分个体和种群的基因之间存在质的差异。
The 3 sibling species D. melanogaster, D. simulans and D. mauritiana differ in only 1 morphological character: the shape of the posterior process of the male genital arch. The genetic basis of this charactser difference (measured as the area of the genital process) was studied in the 2 spp. pairs D. melanogaster/D. simulans and D. simulans/D. maurifiana. The former pair differ by at least 4 gene substitutions affecting the character, with each of the chromosomes having a significant effect on genital process area. The latter pair of species, which are more closely related, differ by at least 5 substitutions affecting the character, with at least 1 occupying the X chromosome and each autosomal arm. In both comparisons, the maximum number of gene substitutions that could have been detected with the techniques used was found. Since the measured divergence between species is then a minimum estimate of the true divergence, it is obvious that the character differences in both comparisons have a polygenic basis. These results, and those of other studies, do not support current theories that there is a qualitative difference between genes differentiating species and genes diferentiating individuals and populations.