Open AccessGenetic potential analysis of six Tilapia populations by microsatellite DNA markers
Author(s) -
Hong Yang,
Dayu Li,
Xiang Cao,
Zhiying Zou,
Wei Xiao,
Jinglin Zhu
Publication year - 2011
Publication title -
yichuan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.125
H-Index - 16
ISSN - 0253-9772
DOI - 10.3724/sp.j.1005.2011.00768
Subject(s) - microsatellite , biology , nile tilapia , loss of heterozygosity , locus (genetics) , allele , population , tilapia , strain (injury) , genetic diversity , genetics , genetic distance , veterinary medicine , genetic variation , fish <actinopterygii> , gene , fishery , oreochromis , anatomy , medicine , demography , sociology
Twenty five microsatellite loci were used to analyze two blue tilapia populations ["Xia'ao 1" (ZA), Guangxi population] and four nile tilapia populations [Egypt strain (ZN), 88 strain (XN), Guangxi population (GN), American strain (MN)]. A total of 7775 fragments ranging from 100 bp to 400 bp in length were obtained. Three to eight alleles were amplified in 25 loci and 143 alleles in all the six populations. The average number of alleles in each locus was 5.72. The average values of observed heterozygosity (Ho) ranged from 0.7253 to 0.8160, the average expected heterozygosity (He) ranged from 0.5146 to 0.6834, the average polymorphic information content (PIC) ranged from 0.4212 to 0.6105, and the number of average effective alleles (Ae) ranged from 2.20 to 3.23. The highest genetic similarity index was 0.9130 (between ZA and GA); and the lowest was 0.4352 (between ZA and ZN). The results showed that the four nile tilapia populations contained a high level of genetic potential, and the two blue tilapia populations were moderate.