Silva Barbara T F, Sampaio Maria I C, Schneider Horacio, Schneider Maria P C, Montoya Enrique, Encarnación Filomeno, Callegari-Jacques Sidia M, Salzano Francisco M
Departamento de Genética, Centro de Ciěncias Biológicas, Universidade Federal do Pará, Campus Universitário do Guamá, Belém, PA, Brazil.
Proyecto Peruano de Primatologia, Instituto Veterinário de Investigaciones Tropicales y de Altura, Iquitos, Peru.
Am J Primatol. 1993;29(3):183-193. doi: 10.1002/ajp.1350290304.
An electrophoretic survey of 15 protein systems (22 loci) was employed to determine the genetic relationships among 9 populations (441 individuals) of South American squirrel monkeys (Saimiri sciureus sciureus, S. sciureus boliviensis, and S. sciureus ustus). Genetic markers capable of differentiating the second from the two other taxa were observed mainly in the ADA and GPI systems. Heterogeneity for ADA and CA2 between populations from opposite banks of the Jamari river was verified in S. sciureus ustus. The average heterozygosities ranged from 3% to 5%, the lowest being in S. sciureus sciureus and the highest in S. sciureus boliviensis. Low genetic distances (D = 0.001-0.057) were observed between populations within taxa or between S. sciureus sciureus and S. sciureus ustus. But both differed to a larger extent from S. sciureus boliviensis (D = 0.11 in both comparisons). There is a positive correlation between the genetic and geographic distance matrices. The three taxa are more clearly separated (D = 0.76-0.77) from the outgroup used for comparison (Cebus apella). Our data suggest that there is only one large, polytypic species of squirrel monkeys in South America, S. sciureus, forming a contiguous ring of geographical races or subspecies. Two of the most differentiated forms meet at the Peruvian Amazonia where natural hybrids and secondary intergradation have been reported. © 1993 Wiley-Liss, Inc.
采用对15种蛋白质系统（22个基因座）的电泳分析来确定南美松鼠猴9个种群（441只个体）（松鼠猴指名亚种、松鼠猴玻利维亚亚种和松鼠猴乌斯图亚种）之间的遗传关系。能够区分松鼠猴玻利维亚亚种与其他两个分类单元的遗传标记主要出现在ADA和GPI系统中。在松鼠猴乌斯图亚种中，验证了雅马里河两岸种群之间ADA和CA2的异质性。平均杂合度在3%至5%之间，最低的是松鼠猴指名亚种，最高的是松鼠猴玻利维亚亚种。在分类单元内的种群之间或松鼠猴指名亚种与松鼠猴乌斯图亚种之间观察到较低的遗传距离（D = 0.001 - 0.057）。但两者与松鼠猴玻利维亚亚种的差异都更大（两次比较中D均为0.11）。遗传距离矩阵与地理距离矩阵之间存在正相关。这三个分类单元与用于比较的外群（白喉卷尾猴）的差异更明显（D = 0.76 - 0.77）。我们的数据表明，南美洲只有一种大型的多型松鼠猴物种，即松鼠猴，形成了一个连续的地理种族或亚种环。其中两个分化最大的形态在秘鲁亚马逊地区相遇，在那里已报道存在自然杂交和次生渐渗现象。© 1993威利 - 利斯公司。
