黑眶蟾蜍、黑斑蛙、中国雨蛙不同地理居群的染色体多样性

本文研究温州地区的黑眶蟾蜍、黑斑蛙、中国雨蛙的核型，分析了三个地理居群的黑星期五蟾蜍、四个地理居群的黑斑蛙、三个地理居群的中国雨蛙核型。结果表明不同地理居群的同种蛙有相同的染色体数和核型模式。黑星期五蟾蜍为2n＝22，NF＝44，核模式6＋5；黑斑蛙为2n=26,NF=52，核模式5＋8；中国雨蛙为2n＝24，NF＝48，核模式6＋6。但同一种蛙的不同地理居群之间在SM数目和顺序、次缢痕或随体的位置等有所不同。说明不同地理居群的同种蛙的染色体具有丰富的多样性。

CHROMOSOME DIVERSITY OF DIFFERENT GEOGRAPHICAL POPULATION OF BUFO MELANOSTICTUS, RANA NIGROMACULATA AND HYLA CHINENSIS

The karyotypes of Bufo melanostictus, Rana nigromaculata and Hyla chinensis from Wenzhou have been studied. The karyotypes of three populations of Bufo melanostictus Schneider, four populations of Rana nigromaculata and three populations of Hyla chinensis from different geographical regions are compared. The results demonstrate that the same species of different geographical populations have the same amount of chromosome and karyotypic formulae. Bufo melanostictus Schneider has 2n=22, NF=44 and 5 6 karyotypic formulae. Rana nigromaculata has 2n=26, NF=52 and 5 8 karyotypic formulae. Hyla chinensis has 2n=24, NF=48 and 6 6 karyotypic formulae. But some dissimilarities are found among them. First, the number and sequence of submetacentric chromosome are different among them, and the secondary contriction(SC) or satellite(Sat) are also different. It shows that the chromosomes of same species of different geographical population have diversities.