Smithsonian Conservation Biology Institute, National Zoological Park Washington, District of Columbia, 20013-7012 ; Environmental Science & Policy Department, George Mason University Fairfax, Virginia, 22030-4444.
Ecol Evol. 2012 Jan;3(1):48-60. doi: 10.1002/ece3.432. Epub 2012 Nov 29.
We investigated the spatial genetic structure of the tiger meta-population in the Satpura-Maikal landscape of central India using population- and individual-based genetic clustering methods on multilocus genotypic data from 273 individuals. The Satpura-Maikal landscape is classified as a global-priority Tiger Conservation Landscape (TCL) due to its potential for providing sufficient habitat that will allow the long-term persistence of tigers. We found that the tiger meta-population in the Satpura-Maikal landscape has high genetic variation and very low genetic subdivision. Individual-based Bayesian clustering algorithms reveal two highly admixed genetic populations. We attribute this to forest connectivity and high gene flow in this landscape. However, deforestation, road widening, and mining may sever this connectivity, impede gene exchange, and further exacerbate the genetic division of tigers in central India.
我们使用多基因座基因型数据，通过基于群体和基于个体的遗传聚类方法，调查了印度中部 Satpura-Maikal 景观中老虎复合种群的空间遗传结构。由于其提供足够栖息地的潜力，使得老虎能够长期生存，Satpura-Maikal 景观被归类为全球优先老虎保护景观（TCL）。我们发现 Satpura-Maikal 景观中的老虎复合种群具有很高的遗传变异性和非常低的遗传细分。基于个体的贝叶斯聚类算法揭示了两个高度混合的遗传种群。我们将其归因于该景观中的森林连通性和高基因流。然而，森林砍伐、道路拓宽和采矿可能会破坏这种连通性，阻碍基因交换，并进一步加剧印度中部老虎的遗传分裂。
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