Analysis of growth performance and breeding value of the Pacific oyster ‘Haida No.1’

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 长牡蛎‘海大1号’生长及育种性能分析 DOI: 作者: 作者单位: 中国海洋大学 海水养殖教育部重点实验室, 山东 青岛 266003 作者简介: 孟乾(1992-),男,硕士研究生,主要从事贝类遗传育种研究.E-mail:1508574120@qq.com 通讯作者: 中图分类号: S968 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）；鳌山科技创新计划课题（2015ASKJ02）. Analysis of growth performance and breeding value of the Pacific oyster ‘Haida No.1’ Author: Affiliation: The Key Laboratory of Mariculture, Ministry of Education;Ocean University of China, Qingdao 266003, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为了研究长牡蛎（）新品种‘海大1号’的生长和育种性能，本研究采用巢式设计，构建了‘海大1号’21个全同胞家系和7个半同胞家系，分析其表型参数、表型相关、遗传力及遗传相关性。结果表明，200日龄时，‘海大1号’与对照组野生长牡蛎的3个家系相比，壳高、壳长、壳宽和总重平均分别提高17%、27%、29%、85%，‘海大1号’具有显著的生长优势；现实遗传力分别为0.128±0.148、0.145±0.190、0.131±0.219、0.135±0.135，属于中低等遗传力。表型相关和遗传相关均为正相关，相关系数的范围为0.730~0.962、0.503~0.768。育种值分析显示，通过个体间比较（30%选择强度），表型值和育种值选留个体相同率为71%~74%，育种值比表型值选择效率高17%~28%；通过家系间比较（50%选择强度），表型值和育种值选留家系相同率为70%~90%，育种值比表型值选择效率高3%~34%。研究结果为制定合理的长牡蛎育种规划、推广新品种长牡蛎‘海大1号’及长牡蛎的良种化提供基础资料。 Abstract:The Pacific oyster, , is an aquatic species which is widely cultivated globally and cultured 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 owing to its rapid expansion. Therefore, studies on selective breeding for more stress-resistant strains are necessary. In the present study, we estimated the growth performance, heritability, and breeding value of ‘Haida 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 approximately 70% consistent at the individual level and 70%−90% consistent at the family level. Selection efficiency 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 and expanding ‘Haida No.1’. 参考文献 相似文献 引证文献