柞蚕耐饥饿能力的遗传效应与杂种优势分析  

Analysis on Genetic Effect and Heterosis of Starvation Tolerance in Chinese Oak Silkworm

作　　者：姜晓旭 焦阳[1] 戚俐[1] 左佳翊 徐亮[1] Jiang Xiaoxu;Jiao Yang;Qi Li;Zuo Jiayi;Xu Liang*(Sericultural Research Institute of Liaoning Province,Fengcheng Liaoning 118100,China)

机构地区：[1]辽宁省蚕业科学研究所,辽宁凤城118100

出　　处：《蚕业科学》2024年第5期476-480,共5页ACTA SERICOLOGICA SINICA

基　　金：柞蚕品种选育学科建设项目(2022DD175629);国家蚕桑产业技术体系项目(CARS-18)。

摘　　要：为探究柞蚕耐饥饿能力的遗传效应与群体杂种优势表现,以5个柞蚕品种(品系)为亲本,采用Griffing双列杂交方法Ⅱ进行完全双列杂交试验设计,利用加性-显性遗传模型和MINQUE(1)法分析柞蚕耐饥饿能力的遗传参数及杂种优势。结果表明,柞蚕耐饥饿能力只受显性基因控制,广义遗传率(h_(B)^(2))为95.98%,达到极显著水平。柞蚕耐饥饿能力表现为正向的群体平均优势,且F_(2)代的优势减半;同时该性状表现为负向的群体超亲优势。9个供试柞蚕杂交组合中,辽蚕527×白茧的耐饥饿能力具有较高的基因显性效应值,适合作为耐饥饿品种选育的杂交组合及用于后续杂交种选育研究。In order to explore the genetic effect of starvation tolerance and the performance of heterosis in populations of Chinese oak silkworm(Antheraea pernyi),a complete double-row hybridization experiment of 5 varieties(lines)was designed by Griffing diallel hybridization method II,and the genetic performance and heterosis of starvation tolerance was analyzed by additive dominant genetic model and MINQUE(1)method.The results showed that the starvation tolerance of Chinese oak silkworm was only controlled by dominant genes,and the broad heritability(h_(B)^(2))was 95.98%,which reached a very significant level.The starvation tolerance of Chinese oak silkworm showed positive average group advantage,and the advantage of F_(2) generation was halved.At the same time,this trait exhibited a negative better-parent value.Among the 9 experimental cross combinations,Liaocan 527×Baijian had a higher gene dominant effect value of starvation tolerance,thus it is suitable to be used as a hybrid combination for the breeding of starvation-tolerant varieties and for the subsequent hybrid breeding research.

关 键 词：柞蚕 耐饥饿能力 遗传率 杂种优势 

分 类 号：S885.1[农业科学—特种经济动物饲养]