水产学报2013，Vol.37Issue(5)：672-678,7.DOI:10.3724/SP.J.1231.2013.38332
凡纳滨对虾生长性状遗传参数的估计
Genetic parameter estimation for growth traits of Pacific white shrimp(Litopenaeus vannamei)
摘要
Abstract
Eighteen half-sib families and fifty-four full-sib families were constructed using methods of nest design and artificial insemination,in which each male mated three females.Sixty 5-month-old shrimp were measured for nine growth traits including the body weight (BW),the total length (TL),the body length (BL),the carapace length (CL),the carapace width (CW),the carapace depth (CD),the first abdominal segment depth(FASD),the third abdominal segment depth (TASD),and first abdominal segment width (FASW).According to quantitative genetics theory,the heritability of each growth trait,and the genetic and phenotypic correlation among the traits were statistically studied utilizing the method of variance and covariance analysis.The results showed that the heritability estimates in the narrow sense from intra-group correlation of paternal half-sib were precise and unbiased,and the heritability values for the above nine traits were0.460,0.392,0.303,0.234,0.251,0.330,0.282,0.321 and 0.356,respectively.All of them belonged to moderate and high heritability,thus showed a high potential for selective breeding.The estimates of genetic correlation coefficients were 0.750-0.976,where the highest(0.976)was that between the BW and the TL,while the lowest(0.750)was seen between the TL and the TASD.The estimates of phenotypic correlation coefficients were 0.507-0.947,where the highest (0.947) was seen between the BW and the TL,while the lowest(0.507)was that between the FASD and the CD.Very significant difference was detected by t-test (P ＜ 0.01) among the nine growth traits for both genetic and phenotypic correlation coefficients,which indicate all the nine traits may respond favorably to direct and indirect selection for growth.关键词
凡纳滨对虾/生长性状/遗传力/遗传相关/表型相关Key words
Litopenaeus vannamei/ growth trait/ heritability/ genetic correlation/ phenotypic correlation分类
生物科学引用本文复制引用
徐如卫,钱昭英,刘小林,路正,任晋东,杨福生..凡纳滨对虾生长性状遗传参数的估计[J].水产学报,2013,37(5):672-678,7.基金项目
科技部农业科技成果转化基金项目(2012GB2E200361) （2012GB2E200361）
国家"八六三"高技术研究发展计划(2006AA10A406) （2006AA10A406）
中国科学院实验海洋生物学开放课题 （）
杭州市钱江特聘专家项目 （）
