罗氏沼虾性成熟前后形态性状对体质量的通径分析  

Path analysis of phenotypic traits on body weight of Macrobrachium rosenbergii before and after sexual maturity

作　　者：邢钱钱 杨旻珉 陈国柱 唐琼英 夏正龙 蔡缪荧 杨杰 杜厚宽 高权新 易少奎 杨国梁[1,2] XING Qianqian;YANG Minmin;CHEN Guozhu;TANG Qiongying;XIA Zhenglong;CAI Miuying;YANG Jie;DU Houkuan;GAO Quanxin;YI Shaokui;YANG Guoliang(Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development,Key Laboratory of Aquatic Animal Genetic Breeding and Nutrition,Chinese Academy of Fishery Sciences,College of Life Science,Huzhou University,Huzhou 313000,China;Jiangsu Shufeng Prawn Breeding Co.,Ltd.,Gaoyou 225654,China)

机构地区：[1]湖州师范学院,浙江省水生生物资源养护与开发技术研究重点实验室,中国水产科学研究院水生动物繁育与营养重点实验室,浙江湖州313000 [2]江苏数丰水产种业有限公司,江苏高邮225654

出　　处：《水产学报》2022年第9期1632-1645,共14页Journal of Fisheries of China

基　　金：国家重点研发计划(2018YFD0901300);江苏省重点研发计划(BE2019352);农业农村部现代农业产业技术体系专项(CARS-48)。

摘　　要：为探明罗氏沼虾养殖群体在性成熟前后表型性状间的相互关系,实验随机选取人工养殖的罗氏沼虾1106尾,对其体质量、全长、体长等15个性状进行测量,并采用相关分析和通径分析阐明形态性状对体质量的影响。结果显示,在性成熟前后及同一阶段雌雄群体之间,影响体质量的关键指标以及所构建的关键表型性状多元回归方程截然不同。在性成熟后,雌雄个体呈现出明显的性二态现象,除第二步足长和第二步足重存在雄性极显著大于雌性外,雄性全长、体长、额剑长、头胸甲高、腹长、腹高和腹部重都极显著小于雌性,这可能与性成熟后雌性通过发达的头胸甲和腹部来提升其繁殖能力有关。统计结果显示,被保留的性状与体质量的复相关系数大于0.85,表明本研究已确定影响各群体体质量的关键性状。研究表明,将罗氏沼虾的性成熟状态和雌雄群体的优良表型作为选育依据,并有效利用影响体质量的关键性状指标,有利于其选育工作的开展。本研究可为罗氏沼虾的良种选育提供参考。Scientific researchers have done a lot of research about the influence of morphological traits of Macrobrachium rosenbergii on body weight of different ages,but the effect of phenotypic traits such as body length before and after sexual maturity on body weight of M.rosenbergii has not been studied.This study aimed to explore the relationship among the phenotypic traits of cultured population M.rosenbergii,before and after sexual maturity.A total of 1106 samples were collected from a hatchery(Gaoyou),and 15 traits including body weight,total length,and body length were measured,and correlation and path analyses were used to clarify the influence of morphological traits on body weight.The results showed that the key traits that affect body weight and the constructed key phenotypic traits multiple regression equations were extremely between before and after sexual maturity,and between male and female groups.According to the coefficient of determination of individual traits on body weight before sexual maturity of M.rosenbergii,total length,body length,carapace width,carapace depth,abdominal depth and length of second leg should be focused on during selective breeding.Carapace length,carapace depth,the weight of second leg and abdominal weight could be used as key parameters for selective breeding after sexual maturity.Before sexual maturity,body length,carapace width,carapace depth,abdominal length,abdominal depth and length of second leg should be considered during breeding in males while total length,body length,rostrum length,abdominal width,abdominal depth and length of second leg could be considered in females.After sexual maturity,carapace width,carapace depth,abdominal depth,weight of second leg and abdominal weight could be selected in females while considering carapace length,abdominal weight and weight of second leg in males.The present study also indicated that the traits affecting body weight were different between males and females even if in the same growth environment and age,and that males and female

关 键 词：罗氏沼虾 形态性状 性成熟前后 性二态 通径分析 

分 类 号：S917.4[农业科学—水产科学]