渔业科学进展2018，Vol.39Issue(3)：96-102,7.DOI:10.19663/j.issn2095-9869.20170328004
低温胁迫条件下中国明对虾生长性状和耐低温性状的遗传参数评估
Evaluation of Genetic Parameters for Growth and Cold Tolerance Traits in Fenneropenaeus chinensis Under Low-Temperature Stress
摘要
Abstract
In the present study, a preliminary evaluation was conducted on the cold tolerance and growth traits of 69 Fenneropenaeus chinensis by indoor artificial cooling. A linear mixed model with average information restricted maximum likelihood was used to evaluate the genetic parameters. Two animal models were used to evaluate the heritability of body weight (BW) and body length (BL) under low-temperature stress in F. chinensis. The heritability of BW and BL observed in model 1 were (0.206±0.177) and (0.187±0.179), respectively, and for model 2, these were (0.317±0.065) and (0.298±0.063), respectively, which ranged between medium to low. The differences between the two models were tested by likelihood ratio test, and the likelihood ratio values for Model 1 and Model 2 were 1.640 and 1.764, respectively, which were not significantly different (P>0.05). The results showed that the two models were not significantly different, and that model 2 was the optimal model. The heritability of the survival status at half lethal time (SS50) among cold tolerant traits was (0.169±0.078). The phenotypic and genetic correlation coefficients between BW and BL under low-temperature stress were (0.823±0.010) and (0.969±0.018), respectively, which were relatively high. The phenotypic correlation coefficients between BW and SS50; and BL and SS50 were comparatively low with values (0.187±0.030) and (0.218±0.030), respectively. The genetic correlation coefficient between BW and SS50; and BL and SS50 were comparatively high with values (0.517±0.205) and (0.538±0.203), respectively. The results showed that during breeding of F. chinensis, the cold tolerant variety can be selected together with growth traits.关键词
中国明对虾/生长性状/耐低温性状/半致死时的存活状态Key words
Fenneropenaeus chinensis/Growth traits/Cold tolerance traits/Survival status at half lethal time分类
农业科技引用本文复制引用
王明珠,孟宪红,孔杰,曹家旺,王军,冯亚萍,强光峰..低温胁迫条件下中国明对虾生长性状和耐低温性状的遗传参数评估[J].渔业科学进展,2018,39(3):96-102,7.基金项目
中国水产科学研究院黄海水产研究所基本科研业务费(20603022017001)、国家自然科学基金(41676148)、泰山学者良种工程项目和现代农业产业技术体系专项资金(CARS-48)共同资助[This work was supported by Central Public-Interest Scientific Institution Basal Research Fund, Yellow Sea Fisheries Research Institute, CAFS(20603022017001), National Natural Science Foundation of China (41676148), Taishan Scholar Program for Seed Industry, and China Agriculture Research System(CARS-48)]. （20603022017001）
