| 摘要: |
| 利用7个凡纳滨对虾(Litopenaeus vannamei)引进群体, 通过双列杂交和巢式交配设计构建家系, 建立育种基础群体, 估计体重、存活性状的遗传参数和基因型与环境互作效应(genotype by environment interactions, G×E)。结果表明, 凡纳滨对虾基础群体体重和存活性状的遗传力估计值范围分别在(0.19±0.09)—(0.43±0.09), (0.27±0.04)—(0.45±0.06), 均属于中高遗传力水平, 并且统计检验显著(P<0.05)。Z-score检验表明, 体重和存活性状遗传力估计值在河北黄骅(HBHH)和青岛鳌山(QBAS)两个测试场间差异均不显著。体重和存活性状的表型和遗传相关系数分别为?0.007和?0.008, 表现为低度线性负相关。对于体重和存活性状, HBHH 和QBAS场间的遗传相关分别为0.83±0.04和0.40±0.11。体重性状的G×E效应不显著(K<0.5), 但存活性状存在显著的G×E效应(K>0.5)。上述结果显示, 凡纳滨对虾基础群体体重和存活性状的遗传变异丰富, 多代选择可获得较大的遗传进展。 |
| 关键词: 凡纳滨对虾 体重 存活 遗传力 遗传相关 基因型与环境互作 |
| DOI：10.11693/hyhz201302029029 |
| 分类号: |
| 基金项目:国家高技术研究发展计划项目(2012AA10A404); 农业部“引进国际先进农业科学技术”项目(2013-Z13); 公益性行业(农业)科研专项(200903045)。 |
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| GENETIC PARAMETERS AND GENOTYPE BY ENVIRONMENT INTERACTION FOR BODY WEIGHT AND SURVIVAL OF PACIFIC WHITE SHRIMP LITOPENAEUS VANNAMEI |
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LUAN Sheng1,2, LUO Kun1,2, RUAN Xiao-Hong1,2, CAO Bao-Xiang1,2, WANG Hao1,2,3, DU Xue-Fang1,2,4, ZHANG Kai1,2,5, KONG Jie1,2
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1.Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;2.Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture;3.College of Fisheries and Life Science, Dalian Ocean University;4.College of Fisheries and Life Science, Shanghai Ocean University;5.College of Marine Life Science, Ocean University of China
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| Abstract: |
| Genetic parameters and genotype by environment interaction (G×E) were obtained for body weight and survival of Pacific white shrimp Litopenaeus vannamei using full-sib and half-sib families from cultured brood females collected from seven introduced populations. The heritability estimates for body weight and survival in the base population all ranged from moderate to high [(0.19±0.09) to (0.43±0.09), (0.27±0.04) to (0.45±0.06)] and were significantly different from zero (P<0.05). The heritabilities estimated between two farm units (HBHH and QDAS) at different locations (Huanghua city and Qingdao city) were not significantly different from each other (P>0.05) for body weight and survival using Z-score test. There was a low phenotypic and genetic correlation between body weight and survival (?0.007 and ?0.008).The genetic correlations between HBHH and QDAS farms were 0.83±0.04 for body weight, and 0.40±0.11 for survival. These correlations suggest that a low G×E effect for body weight (K<0.5), but a high G×E effect for survival (K>0.5). The results show that there is quite substantial additive genetic variance for body weight and survival in Pacific white shrimp that can be exploited through selective breeding. |
| Key words: Litopenaeus vannamei body weight survival heritability genetic correlations genotype by environment interaction |
