中国水产科学2018，Vol.25Issue(2)：263-268,6.DOI:10.3724/SP.J.1118.2018.16371
长牡蛎'海大1号'生长及育种性能分析
Analysis of growth performance and breeding value of the Pacific oyster 'Haida No.1'
摘要
Abstract
The Pacific oyster,Crassostrea gigas,is an aquatic species which is widely cultivated globally and cul-tured mainly in Liaoning, Shandong, and Jiangsu Provinces in China. In recent years, various problems such as disease and natural-resource depletion have brought enormous economic losses to the culture industry of C.gigas owing to its rapid expansion. Therefore, studies on selective breeding for more stress-resistant strains are neces-sary.In the present study,we estimated the growth performance,heritability,and breeding value of C.gigas'Hai-da No.1' to analyze the growth and breeding performance using full-sib family mating experiments. In 2015, 21 full-sib and seven half-sib families were bred. We measured the shell height, shell length, shell width, and total weight of 30 individuals in each family at 200 days after hatching. The results showed that the shell height, shell length, shell width, and total weight were 17%, 27%, 29%, and 85% higher on day 200 compared with the natural population respectively. The heritability on day 200 ranged from 0.128 to 0.145, which is medium-low heritability. Phenotypic correlation and genetic correlation were positive and ranged from 0.730 to 0.962 and from 0.503 to 0.768 respectively. Comparisons between the selection based on breeding value and phenotypic value, were ap-proximately 70% consistent at the individual level and 70%?90% consistent at the family level. Selection effi-ciency for growth traits was 3%?34% higher at the family level and 17%?28% higher at the individual level based on breeding value than that based on the phenotypic value. The study can provide basic data for management of C. gigas and expanding'Haida No.1'.关键词
长牡蛎/生长/遗传力/育种值/海大1号Key words
Crassostrea gigas/growth/heritability/breeding value/'Haida No.1'分类
农业科技引用本文复制引用
孟乾,李琪,王许波,张景晓,于瑞海..长牡蛎'海大1号'生长及育种性能分析[J].中国水产科学,2018,25(2):263-268,6.基金项目
泰山学者种业计划专家项目 （）
山东省重点研发计划(2016ZDJS06A06) （2016ZDJS06A06）
鳌山科技创新计划课题(2015ASKJ02). （2015ASKJ02）
