秘鲁夜猴（Aotus）种群中的XX/“XO”性别决定系统

XX/"XO" sex determination system in a population of Peruvian owl monkey, Aotus.

作者信息

Ma N S, Renquist D M, Hall R, Sehgal P K, Simeone T, Jones T C

出版信息

J Hered. 1980 Sep-Oct;71(5):336-42. doi: 10.1093/oxfordjournals.jhered.a109382.

DOI:10.1093/oxfordjournals.jhered.a109382

Abstract

The chromosome complement of a group of owl monkeys with typical pelagic features characteristic of Aotus inhabiting the upper Amazonian region in South America was analyzed by various band techniques. A diploid chromosome number of 2n = 52 is reconfirmed in the females. A Y-autosome translocation resulting in a complement of 2n = 51 in the males constitutes a unique XX/"XO" sex chromosome system in this population. Karotypic comparison of this Peruvian Aotus (2n - 52 female/51 male) with the Bolivian Aotus (2n = 50 female/49 male) shows the existence of a large degree of analogy of chromosome banding. However, complicated inter- and intra-karyotypic differences between the two chromosome races can be depicted, and substantiates our postulation that the owl monkey is an evolutionary actively diverging species.

摘要

通过各种显带技术分析了一组具有典型远洋特征的夜猴的染色体组型，这些夜猴是栖息在南美洲亚马逊河上游地区的普通夜猴。再次确认雌性的二倍体染色体数为2n = 52。雄性中发生Y染色体与常染色体易位，导致染色体组成为2n = 51，这在该种群中构成了独特的XX/"XO"性染色体系统。将这种秘鲁夜猴（雌性2n - 52/雄性51）与玻利维亚夜猴（雌性2n = 50/雄性49）的核型进行比较，结果表明染色体带型存在很大程度的相似性。然而，两个染色体族之间复杂的核型间和核型内差异也能被描绘出来，这证实了我们的假设，即夜猴是一个在进化上正在积极分化的物种。