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Inbreeding evaluation using microsatellite and its effect on growth traits in turbot, Scophthalmus maximus
Author(s) -
Lyu Ding,
Wu Huanhuan,
Hu Yulong,
Wang Weiji
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13569
Subject(s) - inbreeding , inbreeding depression , biology , turbot , scophthalmus , genetic diversity , population , genetics , zoology , veterinary medicine , fish <actinopterygii> , demography , fishery , medicine , sociology
Turbot is an economically relevant fish, and simultaneously at the risk of inbreeding depression in China. Microsatellite DNA markers were used to evaluate inbreeding level of a random turbot breeding population and further investigate its effects on growth traits. DNA based inbreeding coefficients ( F DNA ) were ranged from 0 to 0.4124. Average inbreeding coefficient was 0.0621 with a standard deviation of 0.0658. Regression analysis results showed inbreeding had a very significant ( p < .01) effect on harvest body weight (BW) and significant ( p < .05) effect on harvest body long (BL). Inbreeding depression, expressed as the percent change in phenotype per 10% increase in F , was −4.00% for BW and −1.14% for BL. The inbreeding depression on high inbreeding coefficient (more than 10%) individuals was further analyzed. A set of significant ( p < .05) and larger inbreeding depression was obtained, −7.15% and −2.49% for BW and BL respectively. This study demonstrates that inbreeding has a negative effect on growth traits and highlights the need of DNA markers to control inbreeding and maximize the genetic diversity in selection breeding programs.