10.24272/j.issn.2095-8137.2018.071
Marker-assisted selection of YY supermales from a genetically improved farmed tilapia-derived strain
DEAR EDITOR,Genetically improved farmed tilapia (GIFT) and GIFT-derived strains account for the majority of farmed tilapia worldwide.As male tilapias grow much faster than females,they are often considered more desirable in the aquacultural industry.Sex reversal of females to males using the male sex hormone 17-α-methyltestosterone (MT) is generally used to induce phenotypic males during large-scale production of all male fingerlings.However,the widespread use of large quantities of sex reversal hormone in hatcheries may pose a health risk to workers and ecological threats to surrounding environments.Breeding procedures to produce genetically all-male tilapia with limited or no use of sex hormones are therefore urgently needed.In this study,by applying marker-assisted selection (MAS) for the selection of YY supermales from a GIFT-derived strain,we identified 24 XY pseudofemale and 431 YY supermale tilapias.Further performance evaluation on the progenies of the YY supermales resulted in male rates of 94.1％,99.5％ and 99.6％,respectively,in three populations,and a daily increase in body weight of 1.4 g at 3 months (n=997).Our study established a highly effective MAS procedure in the selection of YY supermales from a GIFT-derived strain.Furthermore,the development of MAS-selected YY supermales will help reduce the utilization of hormones for controlling sex in the tilapia aquaculture.
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the Special Fund for Marine Fisheries-Scientific Research of Guangdong ProvinceA201501A04;Science and Technology Program of Guangzhou,China201803020043;National Natural Science Foundation of China31572612;Science and Technology Planning Project of Guangdong Province,China2017A030303008
2019-05-09（万方平台首次上网日期，不代表论文的发表时间）
共5页
108-112
