试验对7个江西地方鸡134个个体进行D -loop第一高变区测序,获得360 bp序列进行分析,系统建树显示,7个鸡品种很明显地分成了5个支系A、B、C、E和G.对所有样本进行分子差异等级分析( AMOVA),品种内的方差组分占96.24％,表明7个鸡品种间在这个位点上没有出现显著的遗传分化,品种间表现弱的遗传结构.对134条序列进行网络关系分析表明,整个鸡群体曾经历了群体扩张事件.%D-loop was used to analyze the mitochondrial DNA (mtDNA) variation of 134 individuals of 7 native chicken( Gallus gallus)breeds from Jiangxi. The mitochondrial hypervariable region 1 ( HVR1) of 135 individuals was sequenced. The analysis of these sequences revealed that the chicken breeds were classified into five distinct lineages A,B,C ,E and G. The variation(96. 24% ) within breeds suggested that most of the total genetic variation was due to variation within populations and revealed a weak phylogeographical structure a-mong the breeds. Network analysis showed that population expansion happened among populations.
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