摘要
利用25对微卫星标记研究了江西4个家鹅资源群体(莲花白鹅、兴国灰鹅、广丰白翎鹅和丰城灰鹅)的遗传结构及遗传分化,通过计算F-统计量、基因分化系数和基因流等参数,评估了各群体间遗传结构与分化。结果表明:4个鹅群体间存在较大的遗传分化,20.7%的遗传变异来自于群体间的差异。就全群而言,基因分化系数(GST)为0.1667。莲花白鹅与兴国灰鹅之间的基因流(Nm=1.1802)最大,广丰白翎鹅与丰城灰鹅的基因流(Nm=0.8577)最小。莲花白鹅与兴国灰鹅DS遗传距离(0.2036)最近,广丰白翎鹅与兴国灰鹅的DS遗传距离(0.2935)最远。基于DS遗传距离采用NJ聚类法构建系统树,4个家鹅资源被划分为2大类。分析遗传分化与地理距离的相关关系发现,江西地方鹅种的遗传分化与地理距离不存在明显关联。
The genetic structure and differentiation of 4 indigenous goose populations in Jiangxi province were studied using 25 microsatellite markers. Using the information of F-statistics,GST,gene flow(Nm),DS genetic distances,the genetic structure and differentiation were evaluated. Considerable genetic differentiation was observed and 20.7% of the total genetic variation was from the population differences. So far as all populations were concerned,the GST was 0.1667. The gene flow (Nm) was the most(1.1802) between Lianhua White goose and Xingguo Grey goose,and the least(0.8577) between Guangfengbailing goose and Fengcheng Grey goose. The DS genetic distance was the farmost(0.2935) between Guangfengbailing goose and Xingguo Grey goose,and the nearest(0.2036) between Lianhua White and Xingguo Grey goose. Neighbour-joining dendrogram was constructed based on the DS genetic distance,then two main clusters were found. Analyzing the correlation between genetic differentiations and geographical distances,we presumed that genetic differentiations among the 4 indigenous goose breeds may not be related to geographical distances.
出处
《中国家禽》
北大核心
2007年第19期15-18,共4页
China Poultry
基金
"国家自然科技资源条件平台"资助(2005DKA21101)
关键词
鹅
遗传结构
遗传分化
微卫星标记
F-统计量
goose
genetic structure
genetic differentiation
microsatellite marker
F-statistics
