贵州白香猪群体遗传结构的微卫星分析

Analysis of Genetic Structure of Guizhou Baixiang Pig with Microsatellite Markers

采用27对微卫星标记对贵州大学香猪育种场F11、F12世代贵州白香猪的2个品系进行遗传结构分析。试验结果显示,F11世代贵州白香猪Ⅰ、Ⅱ系的平均有效等位基因、平均期望杂合度、平均多态信息含量和平均近交系数分别为1.9281、1.8189,0.4582、0.4221,0.3664、0.3348和0.5418、0.5779;F12世代贵州白香猪Ⅰ、Ⅱ系的有效等位基因、平均杂合度、平均多态信息含量和平均近交系数分别为1.8289、1.7100,0.4315、0.3868,0.3430、0.3063和0.5685、0.6132。结果表明,经过多个世代的近交繁育,贵州白香猪群体的基因多态性低,近交程度高,已成为一个稳定的遗传群体。

27 microsatellite markers were used to analyze the genetic structure of two Guizhou Baixiang pig strains of the the eleventh and twelfth generations which came from Xiang pig breeding station of Guizhou university.The results showed that the average number of effective allele,expected heterozygosity,polymorphism information content（PIC） and inbreeding coefficients of Guizhou Baixiang pig Ⅰ andⅡstrains of the eleventh generation were 1.9281,1.8189;0.4582,0.4221;0.3664,0.3348 and 0.5418,0.5779,respectively.These genetic parameters of Guizhou Baixiang pig Ⅰ and Ⅱ strains of the twelfth generation were 1.8289,1.7100;0.4315,0.3868;0.3430,0.3063 and 0.5685,0.6132,respectively.The results indicated that Guizhou Baixiang pig had low gene polymorphism and high inbreeding degree through the inbreeding breeding of multiple generations.Guizhou Baixiang pig had already become a stable genetic group.