Inheritance and segregation of microsatellite loci in the hybrid of Oreochromis niloticus♀× Sarotherodon melanotheron♂
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1. Laboratory of Freshwater Fishery Germplasm Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China;2. Guangdong Freshwater Famous Fish Seed Breeding Center, Panyu511453, China

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S917

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    Abstract:

    (♂) using microsatellite markers. We selected 21 loci with different-sized alleles in from 86 pairs of microsatellites. These loci contained 59 alleles, including 22 specific alleles in . The observed heterozygosity was higher in the F1 (=0.739) generation. Conversely, the effective number of alleles(2 were similar to those in F1(=2.45, PIC=0.489). Heterozygous alleles were observed at all loci in the F1, whereas we found evidence of allelic separation at F2 loci. Eighteen loci followed strict Mendelian segregation (chi-squared: 1>) exhibited segregation distortion () exhibited non-segregation. Among the 18 Mendelian loci, the F2 possessed the similar allelic frequencies for specific alleles (47.7%). The genotype frequencies of F1 type, type observed iwere 58.2%, 19.9%, and 21.9%, respectively. Our results suggest that the F2 grossly inherited the heterozygosity from F1, but that there is also a certain degree of separation.

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郭金涛,赵金良,颜标,唐首杰,李思发,叶卫,符云,陈辉崇. 尼罗罗非鱼♀×萨罗罗非鱼♂杂交后代的遗传分离分析[J]. Jounal of Fishery Sciences of China, 2013,[volume_no](3):528-535

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  • Online: May 29,2013
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