Abstract
Largemouth bass(Micropterus salmoides)isan economically important fish species in North America,Europe,and China.Various genetic improvement programs and domestication processes have modified its genome sequence through selective pressure,leaving nucleotide signals that can be detected at the genomic level.In this study,we sequenced 149 largemouth bass fish,including protospecies(imported from the US)and improved breeds(four domestic breeding populations from China).We detected genomic regions harboring certain genes associated with improved traits,which may be useful molecular markers for practical domestication,breeding,and selection.Subsequent analyses of genetic diversity and population structure revealed that the improved breeds have undergone more rigorous genetic changes.Through selective signal analysis,we identified hundreds of putative selective sweep regions in each largemouth bass line.Interestingly,we predicted 103 putative candidate genes potentially subjected to selection,including several associated with growth(psst1 and grb10),early development(klf9,sp4,and sp8),and immune traits(pkn2,sept2,bcl6,and ripk2).These candidate genes represent potential genomic landmarks that could be used to improve important traits of biological and commercial interest.In summary,this study provides a genome-wide map of genetic variations and selection footprints in largemouth bass,which may benefit genetic studies and accelerate genetic improvement of this economically important fish.
基金项目
Key-Area Research and Development Program of Guangdong Province(2021B0202020001)
China Agriculture Research System of MOF and MARA(CARS-46)
Central Publicinterest Scientific Institution Basal Research Fund of CAFS(2020TD23)
Central Publicinterest Scientific Institution Basal Research Fund of CAFS(2020ZJTD-02)
Project of Construction of Guangdong Aquatic Seed Industry Demonstration Base 2021()
Special Funds for Science Technology Innovation and Industrial Development of Shenzhen Dapeng New District(KJYF202101-02)
维普
万方数据