上海海洋大学学报2017，Vol.26Issue(2)：189-196,8.DOI:10.12024/jsou.20160401733
罗氏沼虾生长性状的种内杂交优势及遗传力与遗传相关分析
Analysis of intraspecific heterosis, heritability and genetic correlation of growth traits of Macrobrachium rosenbergii
摘要
Abstract
The germplasm resources of M.rosenbergii are declining in China.To solve this problem,we used 5 strains (A,B,C,D,E) as parents to make complete diallel cross and built 25 mating combinations,whose intraspecific heterosis and genetic correlations of growth traits (body length,carapace width,the first abdominal segment width,the first abdominal segment height and body weight) were analyzed at 90 dph,respectively.The results indicated that the growth traits of all hybrid combinations were better than those of self-combination except D × C.The heterosis was observed in all hybrid combinations,the hybrid combinations of A × E has the greatest heterosis.It can increase the body length by 17.22％,and can increase the weight gain by 71.64％.The heritability was 0.549,0.548,0.527,0.516,0.580 for body length,carapace width,the first abdominal segment width,the first abdominal segment height and body weight,respectively.The genetic correlation and phenotypic correlation between body length and body weight was the highest (0.752 2 and 0.98),while the genetic correlation between carapace width and first abdomere segment height was the lowest (0.667 5),and the phenotypic correlation between body length and the first abdominal segment height was the lowest (0.924 0).The results would provide theoretic basis for further fast growth selective breeding and hybridization of M.rosenbergii.关键词
罗氏沼虾/生长性状/杂种优势/遗传力/遗传相关Key words
M.rosenbergii/growth traits/heterosis/heritability/genetic correlation分类
农业科技引用本文复制引用
江宗冰,戴习林,明磊,蒋飞,王海洋,袁新程,李玉锋,丁福江..罗氏沼虾生长性状的种内杂交优势及遗传力与遗传相关分析[J].上海海洋大学学报,2017,26(2):189-196,8.基金项目
上海市虾类产业技术体系建设项目(沪农科产字[2014]第5号) （沪农科产字[2014]第5号）
