Clegg S M, Hale P, Moritz C
Department of Zoology, University of Queensland, Australia.
Mol Ecol. 1998 Jun;7(6):679-86. doi: 10.1046/j.1365-294x.1998.00376.x.
The genetic population structure of a large, wide-ranging marsupial, the red kangaroo (Macropus rufus) was assessed using sequence and haplotype frequency data of mitochondrial DNA (mtDNA) from locations across the species range in Australia. Results from sequence data revealed extensive haplotype diversity within the red kangaroo (32/34 sequences were unique). Sequence diversity was distributed within rather than between geographical regions across the species range. Genetic connectivity across the range of the species has therefore been maintained over the long term. On a smaller within-region scale, significant genetic structuring was evident from heterogeneity of haplotype frequencies amongst sampling sites. The geographical scale of panmictic populations differed across the continent with more restricted genetic populations occurring in areas with greater topographic and habitat complexity. We propose that these differences in area of genetic populations are the result of population responses to limiting ecological factors during drought.
利用来自澳大利亚红袋鼠（大赤袋鼠，Macropus rufus）整个物种分布范围内各地点的线粒体DNA（mtDNA）序列和单倍型频率数据，评估了这种分布广泛的大型有袋动物的遗传种群结构。序列数据结果显示，红袋鼠内部存在广泛的单倍型多样性（34个序列中的32个是独特的）。序列多样性分布在整个物种分布范围内的各个地理区域内部，而非区域之间。因此，该物种分布范围内的遗传连通性在长期内得以维持。在较小的区域内尺度上，采样地点之间单倍型频率的异质性明显体现出显著的遗传结构。泛交群体的地理尺度在整个大陆上有所不同，在地形和栖息地复杂性较高的地区，遗传群体的限制更大。我们认为，遗传群体面积的这些差异是干旱期间种群对限制生态因素作出反应的结果。
