Density-dependent genetic variation in dynamic populations of the greater long-tailed hamster (Tscherskia triton)
Density-dependent genetic variation in dynamic populations of the greater long-tailed hamster (Tscherskia triton)
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DOI：
10.1644/09-mamm-a-098r1.1
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发表时间：
2010-02-01
影响因子：
1.7
通讯作者：
Zhang, Zhibin
中科院分区：
文献类型：
--
作者：
Dong, Jingping;Li, Chuanhai;Zhang, Zhibin
种群波动会对小型哺乳动物的遗传多样性、行为适应性和种群生存能力产生显著影响。很少有人知道遗传多样性是如何与人口动态，以及是否发生在波动的小啮齿动物种群的遗传otttlensitivity或遗传弹性。使用DNA微卫星和6年的数据。摘要研究了华北棕壤2个地点大仓鼠（Tscherskiatriton）的遗传多样性变化。遗传多样性以每个基因座的平均等位基因数（N-A）、等位基因丰富度（A）、期望杂合性（H-E）和观察杂合性（H-o）来测量。遗传多样性随着种群密度的变化而迅速变化，且呈正相关关系，仅在某些低密度年份出现瓶颈效应。我们的研究结果表明，在这个物种的明显的遗传弹性和恢复能力。我们在大长尾仓鼠的扩散和其他行为的背景下讨论了这种模式，以及农业相关干扰如何影响其遗传多样性DOI：10.1644/09-MAMM-A-098R1.1
Population fluctuations can have a pronounced effect on genetic diversity, behavioral adaptations, and population viability in small mammals. Little is known as to how genetic diversity is associated with population dynamics, and whether genetic ottlenecks or genetic resilience occur in fluctuating populations of small rodents. using DNA microsatellites and 6 years of data. we investigated changes in genetic diversity of the greater long-tailed hamster (Tscherskia triton) at 2 sites in the North China Palm. Genetic diversity was measured as mean number of alleles per locus (N-A), allelic richness (A), expected heterozygosity (H-E), and observed heterozygosity (H-o). Genetic diversity changed rapidly with changes in population density, and the relationship was positive A bottleneck effect was detected only in some low-density years. Our results demonstrate an obvious genetic resilience and capacity for recovery in this species. We discuss this pattern in the context of dispersal and other behaviors of greater long-tailed hamster, and how agriculture-related disturbance affects their genetic diversity DOI: 10.1644/09-MAMM-A-098R1.1