Genic homozygosity in an ancient reptile (Alligator mississippiensis)
Genic homozygosity in an ancient reptile (Alligator mississippiensis)
复制标题
古代爬行动物（密西西比鳄）的基因纯合性
作者：
D. Gartside;H. Dessauer;T. Joanen
对来自路易斯安那州西南部的鳄鱼进行的蛋白质电泳分析显示，在49个推测的遗传基因座中，只有3个发生了变异。个体平均杂合度为0.021±0.012，多态座位比例为0.06。关于这种扬子鳄种群的历史、结构和生态的数据与自然选择是解释这种低遗传变异性的主要因素是一致的。然而，无论是历史上的种群瓶颈还是限制变异性的某些遗传机制都不能被认为是一个可能的因素。
Proteins assayed electrophoretically showed variation at only three of 49 presumed genetic loci in alligators from southwestern Louisiana. Average heterozygosity per individual was 0.021±0.012; proportion of polymorphic loci was 0.06. Data on the history, structure, and ecology of this alligator population are consistent with natural selection as the primary factor accounting for this low genetic variability. However, neither a historic population bottleneck nor some genetic mechanism limiting variability can be dismissed as a possible factor.