Genetics of a contact zone between three chromosomal forms of the grasshopper mouse (Genus Onychomys): a reassessment
Genetics of a contact zone between three chromosomal forms of the grasshopper mouse (Genus Onychomys): a reassessment
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蚱蜢小鼠（甲鼠属）三种染色体形式之间接触区的遗传学：重新评估
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
T. Yates
中科院分区：
文献类型：
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作者：
R. M. Sullivan;D. Hafner;T. Yates
利用染色体、基因和形态学数据重新评估沙鼠相对于O。torridus和O.在以前研究过的同域分布区发现了一个白腹龙（Hinesley，1979）。染色体分析显示，所有三个类群的28个个体的样本中的一个核型变异。这个人表现出一个介于O之间的基本数。torridus和O. arenicola的非差异染色核型的基础上，这表明它可能是后两个类群之间的F1杂种。然而，基于标准核型方法的这两个分类群之间的杂交估计是不可靠的，并且O。仅使用标准核型技术不能确定arenicola的染色体类型（Hinesley，1979）。电泳分析表明，所有三个物种的同域区之间缺乏基因渗入的三个类群。一个染色体变异体在遗传学上与O. torridus。基因、杆状和颅骨分析支持O。arenicola的亲缘关系较近，表明O. leucogaster和O. arenicola之间，O. arenicola及其姐妹分类群O. torridus。
Chromosomal, genic, and morphologic data were used to reassess the specific status of Onychomys arenicola relative to O. torridus and O. leucogaster at a previously investigated zone of sympatry (Hinesley, 1979). Chromosomal analysis revealed one karyotypic variant in a sample of 28 individuals of all three taxa. This individual exhibited a fundamental number intermediate between O. torridus and O. arenicola based on non-differentially stained karyotypes, suggesting that it might be an F1 hybrid between the latter two taxa. However, estimates of hybridization between these two taxa based on standard karyotypic methods are unreliable, and the systematic status of O. arenicola cannot be determined using standard karyotypic techniques alone (Hinesley, 1979). Electrophoretic analysis of all three species from the zone of sympatry indicates a lack of genic introgression between the three taxa. The one chromosomal variant was genically indistinguishable from O. torridus . Genie, bacular, and cranial analyses support the specific status of O. arenicola , and indicate a closer phylogenetic relationship between O. leucogaster and O. arenicola , than between O. arenicola and its presumed sister taxon, O. torridus .