厦门大学学报（自然科学版）2018，Vol.57Issue(1)：65-71,7.DOI:10.6043/j.issn.0438-0479.201704044
日本囊对虾G3选育群体生长性状的遗传参数评估
Estimation of Genetic Parameters for Growth Traits of the G3 Population of Marsupenaeus japonicus
摘要
Abstract
Sixteen full-sib families of Kuruma shrimp (Marsupenaeus japonicus)were constructed by group mating in an indoor scaffolding shrimp pond.Fifty individuals were randomly selected from each of these visible implant elastomer (VIE)tagged full-sib families after being cultured in a higher-place pond for two months.Body weight,body length,carapace length,carapace hight,cara-pace width,the first abdominal segment width and the first abdominal segment hight were measured to estimate the genetic parame-ters for growth traits of the G3 population.The heritability of growth traits and the genetic and phenotypic correlations among growth traits were evaluated using an animal model and the restricted maximum likelihood method.The coefficient of variation of growth traits ranged from 9.84％ to 27.36％,indicating high genetic variance in growth traits.The heritability for growth traits ranged from (0.2027±0.0871)to (0.4233±0.1385).Among them,the maximum heritability of the carapace length was 0.4233 ±0.1385,followed by the heritability of the first abdomen segment width which was 0.4073±0.1353,the lowest heritability of the first abdomen segment hight was 0.2027 ± 0.0871,and the heritability of body length and body weight were (0.3852 ± 0.1517)and (0.3903±0.1979),respectively,indicating medium to high level of genetic improvement for growth potential.The ge-netic correlations among growth traits were high,among which,the highest genetic correlation between body weight and body length was 0.989±0.014,and the lowest genetic correlation between carapace hight and the first abdominal segment hight was only 0.775 ±0.072.The phenotypic correlations among growth traits were siganificant,among which,the highest phenotypic correlation between body weight and body length was 0.947±0.016,and the lowest phenotypic correlation between carapace height and the first abdominal segment hight was 0.571±0.149.As a conclusion,family selection combined with within-family selection are suitable for long time breeding improvement for growth traits of the G3 population of Kuruma shrimp,and body weight and body length are sug-gested to be selected as the key traits for overall consideration,and the high genetic correlations among growth traits indicate that all the other growth traits can be improved through indirect selection.关键词
日本囊对虾/生长性状/遗传参数/遗传力/遗传相关Key words
Marsupenaeus japonicus/growth traits/genetic parameters/heritability/genetic correlation分类
生物科学引用本文复制引用
钟声平,毛勇,王军,苏永全..日本囊对虾G3选育群体生长性状的遗传参数评估[J].厦门大学学报（自然科学版）,2018,57(1):65-71,7.基金项目
国家虾产业技术体系项目(CARS-47) （CARS-47）
广西重点研发计划项目(桂科 AB16380105) （桂科 AB16380105）
厦门市南方海洋中心项目(14CZY033HJ07) （14CZY033HJ07）
