不同地理群体菲律宾蛤仔的选择反应及现实遗传力  

Responses to selection and realized heritability in three geographical populations of Manila clam (Ruditapes philippinarum)

作　　者：闫喜武[1] 张跃环[1] 霍忠明[1] 孙焕强[1] 潘发林 杨凤[1] 张国范[3] 

机构地区：[1]大连海洋大学生命科学与技术学院,辽宁大连116023 [2]长春水产研究院,吉林长春130033 [3]中国科学院海洋研究所,山东青岛266071

出　　处：《水产学报》2010年第5期704-710,共7页Journal of Fisheries of China

基　　金：国家"八六三"高技术研究发展计划(2006AA10A410);国家"十一五"科技支撑计划(2006BAD09A09);辽宁省重大科研项目(990387);辽宁省教育厅创新团队项目(2007T104)

摘　　要：对不同地理群体的3龄菲律宾蛤仔(Pp莆田群体、Dp大连群体、Tp东京群体)进行了混合选择。测量了各实验组的壳长,计算了不同地理群体菲律宾蛤仔的选择反应和现实遗传力。结果表明,3个地群体菲律宾蛤仔子代的上选组壳长显著大于对照组(P<0.05)。在不同生长发育阶段,菲律宾蛤仔的选择反应(R)和现实遗传力(hR2)随着日龄的增大而减小,即R幼虫培育期0.804±0.084>稚贝期0.705±0.039>养成期0.671±0.024;hR2幼虫期0.458±0.051>稚贝期0.402±0.025>养成期0.382±0.013。从总体水平上分析,菲律宾蛤仔R为0.726±0.1074,莆田群体、大连群体、东京群体的R分别为0.758±0.101、0.690±0.049、0.732±0.059;hR2为0.414±0.044,莆田群体、大连群体、东京群体的hR2分别为0.432±0.058、0.393±0.028、0.417±0.033。地理群体间的R和hR2次序为莆田群体>东京群体>大连群体,且彼此间无显著差异。Three geographical populations （ Pp： Putain population; Dp： Dalian population; Tp： Tokyo population） of Manila clam Ruditapes philippinarum of 3-years old were used to test mass selection on growth in July 2006. Shell length of individual was measured by microscope and vernier caliper,moreover,responses to selection and realized heritability were calculated by the methods of Zheng,et al. （2004,2006） among three geographical populations of Manila clam. The results showed that the shell length of selection groups were all significantly higher than that of the control group （P 0. 05）. R and hR2 of Manila clam decreased with increasing days of age during different development stages,that is SR： Larval rearing stage 0. 804 ± 0. 084 Juvenile nursing stage 0. 705 ± 0. 039 Youth culture stage 0. 671 ± 0. 024;hR2： Larval rearing stage 0. 458 ± 0. 051 Juvenile nursing stage 0. 402 ± 0. 025 Youth culture stage 0. 382 ± 0. 013. R of Manila clam was 0. 726 ± 0. 1074,and Pp,Dp,Tp of that was 0. 758 ± 0. 101,0. 690 ± 0. 049,0. 732 ± 0. 059, respectively. Accordingly,hR2 of Manila clam was 0. 414 ± 0. 044,and Pp,Dp,Tp of that was 0. 432 ± 0. 058,0. 393 ± 0. 028,0. 417 ± 0. 033,respectively. The order of R and hR2 of Manila clam among geographical populations was as follow： Pp Dp Tp. Differences in response to selection and realized heritability among the three geographical populations are presumably due to differences in genetic variability.

关 键 词：菲律宾蛤仔 地理群体 选择反应 现实遗传力 

分 类 号：Q348[生物学—遗传学] S917[农业科学—水产科学]