Distant hybridization and gynogenesis between Nile tilapia Oreochromis niloticus and Jaguar cichlid Parachromis managuensis

文献类型： 外文期刊

第一作者： Cao, Jianmeng

作者： Cao, Jianmeng;Yang, Na;Liu, Zhigang;Lu, Maixin;Gao, Fengying;Ke, Xiaoli;Wang, Miao;Yi, Mengmeng;Yang, Na

作者机构：

关键词： Parachromis managuensis; Distant hybridization; Gynogenesis; Oreochromis niloticus

期刊名称：ANIMAL REPRODUCTION SCIENCE （ 影响因子：2.145； 五年影响因子：2.281 ）

ISSN： 0378-4320

年卷期： 2021 年 232 卷

页码：

收录情况： SCI

摘要： To investigate the distant hybridization and gynogenesis between Nile tilapia Oreochromis niloticus and Jaguar cichlid Parachromis managuensis, reciprocal crossing was first performed between the two species. No offspring, however, were viable when there were these hybridizations. Gynogenesis was induced in O. niloticus and P. managuensis using ultraviolet (UV)-irradiated spermatozoa from P. managuensis and O. niloticus, respectively. The morphology during embryonic development indicated gynogenetic offspring of both O. niloticus and the P. managuensis were normal and deformed, and the results from flow cytometric analysis indicated normal fry were diploid and deformed fry were haploid. Gynogenetic O. niloticus and P. managuensis had the same DNA content and chromosome number as their species of origin, indicating that gynogenetic individuals were produced in both species. The presence of only females for both gynogenetic P. managuensis and O. niloticus was indicative of an XX genotype in the female P. managuensis and O. niloticus. Results from studies on genetic diversity indicated the average heterozygosity of the gynogenetic diploid population of O. niloticus were less than that of the cultured population, but the genetic homozygosity of the gynogenetic diploid population of O. niloticus was greater than that of the cultured population after one generation of gynogenesis, which achieved the goal of rapidly establishing genetic homozygosity.

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