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The impact of selection on population genetic structure in the clam Meretrix petechialis revealed by microsatellite markers

文献类型： 外文期刊

作者： Lu, Xia 1 ; Wang, Hongxia 1 ; Li, Yan 3 ; Liu, Baozhong 1 ;

作者机构： 1.Chinese Acad Sci, Inst Oceanol, Lab Expt Marine Biol, Qingdao 266071, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Utilizat Marine Fisheries Res, Minist Agr, Qingdao 266071, Peoples R China

3.James Cook Univ, Sch Trop & Marine Biol, Townsville, Qld 4811, Australia

关键词： Mass selection;Meretrix petechialis;Microsatellite;Population genetic structure;Temporal genetic variation

期刊名称：GENETICA （ 影响因子：1.082； 五年影响因子：1.489 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The aim of our work is to evaluate the impact of mass selection on genetic structure in artificially closed populations of the clam Meretrix petechialis. In the present study, we performed mass selection over four generations (from 2004 to 2010) on two clam populations [shell features of purple lines (SP) and black dots (SB)] and analyzed their temporal genetic variation and structure using microsatellite makers. The two closed populations originated from the natural Shandong population (SD); thus, a natural SD population (10SD) was used to detect the current genetic structure after 6 years of natural selection. The results showed that the genetic diversity of the four generations of SB and SP was gradually reduced but remained at relatively high levels (SB, A = 18.9.4-16.8, Ho = 0.7389-0.6971, and He = 0.8897-0.8591; SP, A = 20.0-17.8, Ho = 0.7512-0.7043, and He = 0.8938-0.8625), which has not been reduced compared with that of the 10SD population (A = 17.8, Ho = 0.6803, and He = 0.8302). The Ne estimates for the two populations were almost at the same levels as the actual numbers of parental individuals. In addition, a low inbreeding coefficient was detected in the two populations (SB, 0.00201-0.00639; SP, 0.00176-0.00541). Based on the results, the present mass selection has not made a large impact on the population genetic structure of the closed populations. The present investigation provides important information for the development of management strategies for genetic breeding of the clam.

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