中国水产科学Issue(6)：1182-1187,6.DOI:10.3724/SP.J.1118.2013.01182
合浦珠母贝幼贝生长性状的遗传参数估计
Estimates of genetic parameters for growth traits in juvenile pearl oyster Pinctada fucata
摘要
Abstract
The pearl oyster Pinctada fucata is an economically important oyster that is used for pearl production. There is considerable focus on improving selective breeding procedures for certain traits. We used the specimens of P. fucata from two geographic populations in Xuwen, Guangdong and Sanya, Hainan as the parents to construct 33 full-sibs families by artificial fertilization. We estimated the genetic parameters of growth traits in juvenile P. fucata. Fifty 162-day-old individuals were randomly sampled from each family. Shell length, shell height, shell width, and body weight were measured, and used for genetic analysis using a maximum likelihood algorithm based on an animal model. The total phenotypic means of the four growth traits were (16.28 ± 4.46) mm, (14.85 ± 4.39) mm, (4.58 ± 1.52) mm, and (0.66 ± 0.67) g, respectively. There was a significant difference between differ-ent traits in different families, indicating that family has a significant (P<0.01) influence on growth traits in juve-nile P. fucata. The heritability of these four traits are 0.202 ± 0.020, 0.203 ± 0.020, 0.200 ± 0.021, and 0.204 ± 0.020, respectively, suggesting that there was some degree of selective potential by family selection. The pairwise phenotypic and genetic correlations between growth traits were 0.667−0.698 and 0.685−0.959, respectively. Based on our results, we predict that if one trait is improved genetically, the others will also be improved as the pheno-typic and genetic correlations between the four traits were highly positive. The genetic correlation between shell width and body weight was highest (0.959), suggesting that the best way to improve body weight is by selection for shell width.关键词
合浦珠母贝/全同胞家系/生长性状/遗传力/选择育种Key words
Pinctada fucata/full-sibs family/growth trait/heritability/selective breeding分类
农业科技引用本文复制引用
黎火金,刘宝锁,罗会,黄桂菊,陈明强,范嗣刚,李有宁,喻达辉..合浦珠母贝幼贝生长性状的遗传参数估计[J].中国水产科学,2013,(6):1182-1187,6.基金项目
现代农业产业技术体系建设专项项目(CARS-48) （CARS-48）
农业公益性行业科研专项项目(200903028) （200903028）
农业科技成果转化资金项目(2011GB23260016) （2011GB23260016）
广东省海洋渔业科技推广专项项目(A201101A01, A201101A03, A201201A03, A201201A01) （A201101A01, A201101A03, A201201A03, A201201A01）
中央级公益性科研院所基本科研业务费专项项目(2011TS04) （2011TS04）
