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首页> 外文期刊>Herpetologica >LOW GENETIC DIVERSITY IN SEVERAL GOPHER TORTOISE (GOPHERUS POLYPHEMUS) POPULATIONS IN THE DESOTO NATIONAL FOREST, MISSISSIPPI
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LOW GENETIC DIVERSITY IN SEVERAL GOPHER TORTOISE (GOPHERUS POLYPHEMUS) POPULATIONS IN THE DESOTO NATIONAL FOREST, MISSISSIPPI

机译：密西西比州底索托国家森林中几个高地乌龟（GOPHERUS POLYPHEMUS）种群的遗传多样性低

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Gopherus polyphemus has experienced severe population declines, especially in the western portion of its range. As a consequence, G. polyphemus may have experienced population bottlenecks that resulted in a decrease in genetic diversity and all accumulation of deleterious alleles. The importance of genetic diversity has been well-documented for several fitness parameters (e.g., survival, disease resistance, growth and developmental rates, and developmental instability). Western populations of G. polyphemus in south Mississippi (USA) have lower hatching success (16.7-48%) than that found in eastern populations (67-97%). Even under laboratory conditions, approximately 40% of the eggs still failed to hatch, suggesting that intrinsic (egg quality) factors may be affecting development. Using nine microsatellite loci, we genotyped individuals from four populations in south Mississippi and one eastern population (Fort Benning, GA) and compared several genetic diversity indices (e.g., allelic richness, expected heterozygosity, and percent polymorphic loci) with published data from populations in the eastern portion of the range, such as populations east of the Mobile and Tombigbee rivers. We found significantly lower genetic diversity in the four Mississippi populations than in the eastern populations. However, these findings only demonstrate that these populations have low genetic diversity, and establishing any causal relationship between low genetic diversity (or other intrinsic factors; e.g., female condition) and reduced reproductive success should be further investigated.
机译：鼠疫多语种经历了严重的种群减少，特别是在其范围的西部。结果，G。polyphemus可能经历了种群瓶颈，导致遗传多样性下降和有害等位基因的所有积累。对于多种适应性参数（例如存活率，抗病性，生长和发育速率以及发育不稳定性），遗传多样性的重要性已得到充分证明。南部密西西比州（美国）的西部聚苯丙胺菌种群的孵化成功率（16.7-48％）低于东部种群（67-97％）。即使在实验室条件下，大约40％的卵仍不能孵化，这表明内在的（蛋的质量）因素可能会影响发育。我们使用9个微卫星基因座，对来自密西西比州南部四个种群和一个东部种群（佐治亚州本宁堡）的个体进行了基因分型，并将几个遗传多样性指数（例如，等位基因丰富性，预期的杂合性和多态性百分比）与来自该种群的已发表数据进行了比较。山脉的东部，例如莫比尔河和汤比比河以东的人口。我们发现密西西比州的四个种群的遗传多样性明显低于东部种群。但是，这些发现仅表明这些人群的遗传多样性较低，应进一步研究在低遗传多样性（或其他内在因素;例如女性状况）与生殖成功率降低之间建立任何因果关系。

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