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Effect of inbreeding on survival, WSSV tolerance and growth at the postlarval stage of experimental full-sibling inbred populations of the Chinese shrimp Fenneropenaeus chinensis

文献类型： 外文期刊

作者： Luo, Kun 1 ; Kong, Jie 2 ; Luan, Sheng 2 ; Meng, Xian-Hong 2 ; Zhang, Tian-Shi 2 ; Wang, Qing-Yin 2 ;

作者机构： 1.Ocean Univ China, Fac Life Sci & Technol, Qingdao 266003, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

关键词： Inbreeding;Inbreeding depression;Survival;Growth;Fenneropenaeus chinensis

期刊名称：AQUACULTURE （ 影响因子：4.242； 五年影响因子：4.723 ）

ISSN： 0044-8486

年卷期： 2014 年 420 卷

页码：

收录情况： SCI

摘要： Inbreeding effects on growth, survival and anti-WSSV (White Spot Syndrome Virus) traits were studied in experimental full-sibling inbred populations of Chinese shrimp Fenneropenaeus chinensis at three levels of inbreeding coefficient (F = 0.25, F = 0.375, F = 0.50) from a Chinese shrimp selection program. The body weight of the control group (F approximate to 0.00) was significantly different from those of the three levels of inbreeding groups at three postlarval stages (PL80, PL100 and PL140). At PL140, an increasing inbreeding depression of growth was observed with increasing inbreeding coefficient. The inbreeding depression was found to be -10.4% at F = 0.25, -16.61% at F = 0.375 and -23.68% at F = 0.50. There was also a tendency for inbreeding depression for body weight to increase with age. The estimated coefficient of body weight of PL140 were -4.16%, -4.43% and -4.74% per 10% increase of inbreeding coefficient of F = 0.25, F = 0.375, F = 0.50, respectively. During growout, inbreeding depression of survival ranged from -0.98% to -12.44%, although the effects were not significant. Over all levels of inbreeding the average inbreeding depression was found to be -5.95% for survival of PL80, -5.51% for PL100 and -6.71% for PL140. The estimated average inbreeding depression coefficient of survival ranged from -1.27% to -1.77% per 10% increase of inbreeding coefficient of F, lower than the estimate obtained for growth. The effects of inbreeding on survival time after challenge with White Spot Syndrome Virus (WSSV) were not significant, as there was no significant difference in survivorship among the control and the three levels of inbreeding coefficient groups. The inbreeding depression of the three levels ranged from -0.68% to -2.22%, and the estimated inbreeding depression coefficient of survival time ranged from -0.27% to -0.44% per 10% increase of inbreeding coefficient of F. This study demonstrates that inbreeding has a negative effect on the economic traits, especially on growth, thus highlighting the need to maximize the genetic diversity in selective breeding programs. (C) 2013 Elsevier B. V. All rights reserved.

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