Ma Nancy Shui-Fong, Aquino Rolando, Collins William E
New England Regional Primate Research Center, Harvard Medical School, Southborough, Massachusetts.
Primate Breeding Center, Iquitos, Peru.
Am J Primatol. 1985;9(4):333-341. doi: 10.1002/ajp.1350090409.
The observation of remarkable karyotypic variation in owl monkeys (Aotus trivirgatus) stimulated us to study the chromosomal evolution of this New World genus. As an extension of this project, we examined the chromosome complement of a "phenotype-B" Aotus population from Peru. In addition to karyotype V(2n = 46), two new karyotypes with diploid numbers of 47 and 48 were identified. A G-band comparison of these karyotypes indicated that the chromosome number polymorphism in these Peruvian owl monkeys resulted from a single fusion or fission event involving a single metacentric and two acrocentric chromosome pairs. This mechanism is also known to be responsible for the chromosome number polymorphism in at least two other populations of phenotype B Aotus, one from Colombia and the other from Panama.
夜猴（Aotus trivirgatus）中显著的核型变异观察结果促使我们研究这个新大陆属的染色体进化。作为该项目的延伸，我们检查了来自秘鲁的一个“B型表型”夜猴种群的染色体组。除了核型V（2n = 46）外，还鉴定出了两种新的核型，其二倍体数分别为47和48。这些核型的G带比较表明，这些秘鲁夜猴的染色体数目多态性是由涉及一个中着丝粒和两个近端着丝粒染色体对的单一融合或裂变事件导致的。已知这种机制也是至少另外两个B型表型夜猴种群（一个来自哥伦比亚，另一个来自巴拿马）染色体数目多态性的原因。
