Genetic parameters of survival for six generations in the giant freshwater prawn Macrobrachium rosenbergii

文献类型： 外文期刊

第一作者： Luan, Sheng

作者： Luan, Sheng;Luo, Kun;Kong, Jie;Wang, Junyi;Yang, Guoliang;Chen, Xuefeng;Gao, Qiang;Wang, Junyi;Yang, Guoliang;Chen, Xuefeng;Gao, Qiang;Hu, Honglang

作者机构：

关键词： Macrobrachium rosenbergii;survival;heritability;genetic correlation;selective breeding

期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Genetic parameters were estimated for survival of Macrobrachium rosenbergii using a fully pedigreed synthetic population formed by three introduced strains. The data included 107398 progeny from 394 sires and 654 dams in six generations with a nested mating structure. The variance components and genetic parameters were estimated using a generalized linear mixed model with the probit link function. Available heritabilities in survival from the generation G(3) to G(5) ranged from 0.007 +/- 0.020 to 0.066 +/- 0.044 (P>0.05) using a model that included the common environmental effect (c). Across generations, low heritability (0.016 +/- 0.012, P>0.05) was estimated using the model with inclusion of the c effect. There were statistically significant differences in the heritability estimates between different ponds for most generations. Moreover, the genetic correlation of survival between ponds over six generations varied from low to high (-0.0007 +/- 0.17 to 0.80 +/- 0.069) and was significantly different from unity. There were low correlation coefficients (-0.039 +/- 0.096 to 0.342 +/- 0.081) between body weight estimated breeding value (EBV) and survival EBV of families in different generations. The low heritabilities for survival are most likely caused by low genetic variation in the founder populations and reduced genetic variation because of consecutive selection.

分类号： S9

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