tailieunhanh - Ước tính các thông số di truyền một số tính trạng quan trọng trên quần thể chọn giống rô phi đỏ thế hệ thứ 5 tại Việt Nam

Bài viết này thực hiện ước tính các thông số di truyền bao gồm hệ số di truyền, tương quan di truyền và tương tác giữa kiểu gen và môi trường (GxE) các tính trạng tăng trưởng, tỷ lệ sống và màu sắc rô phi đỏ chọn giống thế hệ thứ năm sau khi nuôi ở ao nước ngọt và lợ mặn. Mời các bạn cùng tham khảo! | Trường Đại học Nông Lâm TP. Hồ Chí Minh 49 Genetic parameter estimates for important traits on the fifth generation in red tilapia in Vietnam Sang V. Nguyen Phuc H. Tran Truong V. Dang amp Khoa D. Pham Research Institute for Aquaculture No. 2 Ho Chi Minh City Vietnam ARTICLE INFO ABSTRACT Research Paper Genetic parameters comprising heritability genetic correlation and geno- type by environment interaction GxE for growth survival rate and body Received January 21 2021 colour at harvest were estimated on the 5th selective generation of red Revised February 18 2021 tilapia grown in two environments freshwater and brackishwater ponds. Accepted February 26 2021 A total of 116 full- half-sib families was produced as well as 4 432 and 3 811 tagged individuals were tested in freshwater and brackishwater ponds respectively. Genetic parameters were estimated by ASReml Keywords software. The heritability for body weight and survival rate was high while medium heritability for body colour in freshwater was observed. The heritability for those traits of red tilapia in brackishwater. Together Body colour with the figures in earlier publication on previous generations G1 to Genetic parameters G4 in the same selective population the expected medium to high re- Growth sponse acquires if selection is done for each trait. Genetic correlations Red tilapia among harvest body weight survival rate and body colour are insignifi- Survival cantly different and ranging from to P gt . These results implied that selection on one trait do not influence on responses of the Corresponding author other traits. GxE interaction for body weight and body colour between two tested environments is mostly negligible with genetic correlations Nguyen Van Sang ranging from - while it is important for survival trait rg Email nvsangumb@ . Cited as Nguyen S. V. Tran P. H. Dang T. V. amp Pham K. D. 2021 . Genetic parameter estimates for important traits on the