云南普通马矮型马蛋白多态性及其品种分化关系

本文运用蛋白电泳技术对来自云南省文山州马关县和麻栗坡县的２１匹普通马和１４匹矮型马进行了分析。共分析遗传座位４４个，其中有１０个座位检测到多态性。根据分子钟假说和相应的公式，推算两者的分歧时间约为１８．５万年。

PROTEIN POLYMORPHISM AND GENETIC DIFFERENTITION IN YUNNAN COMMON HORSE AND SHORT HORSE POPULATIONS

In this paper, using protein electrophorsis, we analyzed two different populations of Yunnan horses, the Yunnan common horses(21 individuals) and the short horses(14 individuals). Of all the 44 genetic loci surveyed, 10 of them were found to be polymorphic. Therefore, as for the common horse population, the percentage of polymorphic loci(P) is 0.227, the mean heterozygosity(H) is 0.089 and the mean number of allels(A) is 1.273. In short horse population, P=0.205, H=0.083, A=1.250. The above results indicated that both the common and short horse populations were wealthy of genetic diversity. There existed many variations of alleles in the two populations from limited areas of Yunnan Province. Futhermore, we calculated Nei's genetic distance (D) between the two populations and got a value of 0.0317, which imply a certain degree of genetic differentiation between them. According to the hypothesis of molecular clock, we speculated that the divergent event occurred about 18.5 million years ago.