Perini Marcos Vinícius, Weimer Tania A, Callegari-Jacques Sidia M, Mattevi Margarete S
Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
Biochem Genet. 2004 Oct;42(9-10):317-29. doi: 10.1023/b:bigi.0000039807.50393.30.
An electrophoretic analysis of 12 allozyme systems (14 loci, 40 alleles) was performed in the rodent genera Oryzomys and Oligoryzomys, in order to determine the levels of genetic variability within and among populations and species. One hundred and fifty-five individuals from 16 populations of Oryzomys russatus, Or. angouya, Oligoryzomys flavescens, and O1. nigripes species were trapped in nine Brazilian localities. Genetic divergence among populations, as well as the interpopulational gene diversity, was higher in Oryzomys than in Oligoryzomys. The dendrogram of the phenetic relationships among the 16 populations of these four species displays three clusters: the first one joins the O1. flavescens populations with those of O1. nigripes; the second groups the populations of Or. russatus, and the last assembles the populations of Or. angouya. The genetic parameters analyzed reveal that the species belonging to the genus Oryzomys are genetically more structured than those of Oligoryzomys, the latter presenting lower levels of intrademe genetic differentiation (G(ST)')
为了确定种群和物种内部及之间的遗传变异水平，对稻鼠属（Oryzomys）和小稻鼠属（Oligoryzomys）的啮齿动物进行了12个等位酶系统（14个基因座，40个等位基因）的电泳分析。从巴西9个地区捕获了来自16个种群的155只个体，这些种群包括褐稻鼠（Oryzomys russatus）、安古亚稻鼠（Or. angouya）、黄腹小稻鼠（Oligoryzomys flavescens）和黑足小稻鼠（O1. nigripes）。稻鼠属种群间的遗传分化以及种群间基因多样性高于小稻鼠属。这四个物种16个种群的表型关系聚类图显示出三个聚类：第一个聚类将黄腹小稻鼠种群与黑足小稻鼠种群合并；第二个聚类将褐稻鼠种群归为一组；最后一个聚类将安古亚稻鼠种群聚集在一起。分析的遗传参数表明，稻鼠属物种的遗传结构比小稻鼠属更复杂，后者的种群内遗传分化水平较低（G(ST)'）
