The world's first heterotetraploid crucian carp was born in Hunan (12.1)

OA_show('918'); Liu Jun, a famous expert in animal and aquatic products and academician of Chinese Academy of engineering, disclosed in Honghu, Hubei Province on November 27 that the school of life sciences of Hunan Normal University and its cooperative unit, East Lake fishery in Xiangyin, Hunan Province, have successfully cultivated the world's first tetraploid fish population with stable genetic characteristics and natural reproduction by using the integrated technology of cell engineering and sexual hybridization The male sterile triploid crucian carp (Xiangyun crucian carp) and triploid carp (Xiangyun carp) were successfully bred by crossing the body fish with diploid fish In October this year, the appraisal committee headed by academician Zhu Zuoyan, a famous expert in genetics and breeding, academician Lin Haoran, an expert in aquatic biology, and academician Zhai Zhonghe, an expert in cell biology, held that "this achievement marks that Chinese scientists have made creative breakthroughs in the theory and application of polyploid breeding of fish, ranking the international leading level." Polyploid breeding is an important topic in the field of fish breeding After more than ten years of research, the school of life sciences of Hunan Normal University and Xiangyin East Lake fishing ground have made remarkable achievements in basic theory and application technology They used genetics, cell biology, developmental biology and other methods to study and find out the third generation, the eighth generation of allotetraploid fish produced by the mating of female red crucian carp and male Xiangjiang wild carp, and finally got the sterile triploid Xiangyun crucian carp and Xiangyun carp by the hybridization of allotetraploid crucian carp and diploid fish This kind of fish will not reproduce offspring Therefore, triploid fish is also called environmental protection fish 。 It has the characteristics of fast growth, good meat quality, high edible rate, strong disease resistance and sterility At present, it has been widely used in more than 20 provinces and cities in China, forming a large industrial scale and achieving significant economic benefits Experts believe that heterotetraploid fish can be passed on from generation to generation, forming a stable new breeding population of tetraploid fish Through novelty search, it is the first heterotetraploid fish that can be bred by both sexes in the world It provides a very important theoretical basis for exploring the formation mechanism of polyploid fish in nature and a new way for polyploid breeding of fish JMR (author:)