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

Lu, Xia, Wang, Hongxia, Li, Yan, and Liu, Baozhong (2016) The impact of selection on population genetic structure in the clam Meretrix petechialis revealed by microsatellite markers. Genetica, 144 (1). pp. 1-8.

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Abstract

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.

Item ID: 43242
Item Type: Article (Research - C1)
ISSN: 1573-6857
Keywords: mass selection, Meretrix petechialis, microsatellite, population genetic structure, temporal genetic variation
Funders: Chinese National High-Tech R & D Program (CNHT), Zhejiang Science and Technology (ZST)
Projects and Grants: CNHT 2012AA10A410, ZST 2012C12907-4
Date Deposited: 09 Mar 2016 07:30
FoR Codes: 06 BIOLOGICAL SCIENCES > 0604 Genetics > 060407 Genome Structure and Regulation @ 50%
06 BIOLOGICAL SCIENCES > 0604 Genetics > 060408 Genomics @ 50%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830103 Aquaculture Molluscs (excl. Oysters) @ 100%
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