上海海洋大学 农业部水产种质资源与利用重点开放实验室, 上海 201306
严骏骢(1983), 男, 硕士研究生, 研究方向为动物遗传育种. E-mail: yanjuncong@qq.com
国家自然科学基金重点项目(30630051); 上海市重点学科建设项目资助(Y1101).
在世界范围的群体遗传状况技术分析了鳙中国土著群体与国内、外移居群体, 黑龙江、多瑙河、密西西比河移居群体分别为0.012 2±0.061 9这与移居群体的来源以及在异地适应、定居、建群过程中发生了明显的遗传瓶颈效应有关。群体间差异对群体总遗传变异的贡献率为F), ), 反映了移居新形成的自然群体在遗传背景、遗传漂变、经历的生态环境压力与自然选择等方面与土著群体间存在明显差异。本研究通过了解鳙自然群体的遗传现状, 为鳙遗传资源保护、引种移植管理提供依据。
in eastern China plains, and has also formed some new populations in alien rivers due to extensive introduction for aquacultural or ecological purposes. To understand the genetic resource of wild bighead carp around the world, genetic variation of Chinese native populations from Yangtze River (YZ) and Pearl River (PR), national introduced populations from Amur River (AMUR), and two alien introduced populations from Danube River (DAU), Europe, and Mississippi River (MIS) and North America were analyzed by AFLP. The results showed Nei's genetic diversity () of the native populations YZ and PR were 0.0394±0.1221 and 0.0529±0.1236, respectively, while 0.0233±0.0883, 0.0122±0.0619 and 0.0134±0.0614 for the introduced AMUR, DAU and MIS populations. Genetic diversity of the introduced populations was lower than the native populations because continuous genetic bottle-neck effects happened for the introduced populations during the progresses of introduction, adaption and establishment of new populations in alien areas. AMOVA showed the variance within populations was 68.52% while interpopulations variance was 31.48% for all bighead carp populations. The <0.01), while of native populations and introduced populations was 0.155 0 (<0.01). There was significant difference among native populations and introduced populations, which may reflect different genetic background and genetic drift, ecological pressure and natural selection exerted on them. The above results may be helpful to monitor genetic variation trends for both native populations and introduced populations in alien rivers in the future.
严骏骢,赵金良,李思发,郑德锋,曹阳.鳙中国土著群体与移居群体遗传变异的AFLP分析[J].中国水产科学,2011,18(2):283-289
.[J]. Journal of Fishery Sciences of China,2011,18(2):283-289
