“吉富”系列罗非鱼生长性状的配合力、杂种优势与遗传相关分析  

Analysis of combining ability,heterosis and genetic correlation on growth traits of GIFT tilapia

作　　者：林明雪[1] 杨洁[1] 岳武成 康伟[1] 雷双永 杜金星[1] 王成辉[1] 

机构地区：[1]上海海洋大学,农业部淡水水产种质资源重点实验室,上海201306

出　　处：《南方水产科学》2016年第2期1-6,共6页South China Fisheries Science

基　　金：广西科技厅重大项目(桂科重14121004-1-2);现代农业(罗非鱼)产业技术体系建设专项资金(CARS-49-04B)

摘　　要："吉富"系列罗非鱼是中国当前养殖的主要罗非鱼种类。该研究以3个品系"吉富"尼罗罗非鱼(Oreochromis niloticus)(新吉富、吉富、吉诺玛)为研究材料,应用3×3完全双列杂交设计构建了9个组合,采用数量遗传学方法对各组合子一代的体质量、全长、体长、体高和体宽5个生长性状的配合力、杂种优势与遗传相关进行了分析。结果表明:5个生长性状均未检测到一般配合力,而特殊配合力效应达62%以上,表明这些性状主要受到特殊配合力的影响;进一步的杂种优势分析发现吉诺玛♀×新吉富♂、新吉富♀×吉诺玛♂、吉富♀×新吉富♂这3个组合的杂种效果明显,其中以吉诺玛♀×新吉富♂为最佳组合;5个生长性状之间均存在显著的遗传相关与表型相关(P<0.05),可进行多性状的聚合利用。该研究结果为"吉富"系列罗非鱼的配套利用提供了有益的资料和数据,同时为开展罗非鱼配套系育种提供了依据。Gift strains of Nile tilapia （Oreochromis niloticus） have become the main aquaculture fish in China＇s tilapia industry. Weconstructed nine complete set combinations through 3 x 3 complete diallel cross among three strains of Gift Nile tilapia （New GIFT,GIFT and Genomar） to analyze the combining ability, heterosis and genetic correlation in Fl progenies among these nine combinationsfor five growth traits （body weight, total length, body length, body height and body width）. No general combining ability was detec-ted for the five growth traits, while the special combining ability was over 62%, which indicates that the growth traits were mainly af-fected by special combining ability. Significant heterosis was observed in the three combinations of Genomar ♀x New GIFT ♂ , NewGIFT ♀x Genomar♀xand GIFT♂ New GIFT ♀x, among which Genomar ♀xNew GIFT♂ was the best complete set combination.Besides, significant genetic and phenotypic correlations were detected among the five growth traits （ P 〈 0. 05 ）, indicating polymeriza-tion utilization could be conducted in multiple traits in the future. Thus, the results provide references for complete set utilization andbreeding of GIFT tilapia.

关 键 词：“吉富”罗非鱼 生长性状 双列杂交 数量遗传 

分 类 号：S965.125[农业科学—水产养殖]