野燕麦等位酶频率的微观地理变异
Microgeographical Variation in Allozyme Frequencies in Avena barbata.
作者信息
Hamrick J L, Allard R W
机构信息
Department of Genetics, University of California, Davis, Calif. 95616.
出版信息
Proc Natl Acad Sci U S A. 1972 Aug;69(8):2100-4. doi: 10.1073/pnas.69.8.2100.
Abstract
Microgeographical distribution of alleles of five enzyme loci and one morphological variant has been determined within populations of A. barbata occupying sites that are transitional between different vegetational zones. The results show that the spatial distribution of alleles is nonrandom and highly correlated with habitat in patterns that parallel the distribution of the same alleles in major climatic zones in California. It is concluded that the observed patterns of variation are best explained by Neo-Darwinian evolutionary models, in which selection plays a predominant role.
摘要
已确定了巴巴多斯羊茅（A. barbata）种群中五个酶位点的等位基因和一个形态变异体的微观地理分布，这些种群占据着不同植被带之间的过渡地带。结果表明，等位基因的空间分布是非随机的，并且与栖息地高度相关，其模式与加利福尼亚主要气候带中相同等位基因的分布平行。得出的结论是，观察到的变异模式最好用新达尔文进化模型来解释，在这些模型中选择起着主导作用。
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