尼罗罗非鱼生长激素促分泌素受体基因(GHSR)生长相关单核苷酸多态性(SNPs)位点的筛选

本研究用直接测序法,以尼罗罗非鱼(Oreochromis niloticus)基础群体和快长群体父母本为材料进行生长激素促分泌素受体基因(growth hormone secretagogue receptor,GHSR)单核苷酸多态性(single nucleotide polymophisms,SNPs)位点的筛选;再以两群体的子代为材料,采用snapshot法对筛选到的SNPs进行基因分型,并利用一般线性模型(general linear model,GLM)对基因型与生长性状进行相关性分析。结果表明,从两个尼罗罗非鱼群体的GHSR基因中共获得S1(A-409G)、S2(G-424T)、...

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Published in农业生物技术学报 Vol. 23; no. 6; pp. 762 - 771
Main Author 王春晓 卢迈新 高风英 刘志刚 曹建萌 朱华平 可小丽 王淼 叶星 叶卫
Format Journal Article
LanguageChinese
Published 2015
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ISSN1674-7968

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Summary:本研究用直接测序法,以尼罗罗非鱼(Oreochromis niloticus)基础群体和快长群体父母本为材料进行生长激素促分泌素受体基因(growth hormone secretagogue receptor,GHSR)单核苷酸多态性(single nucleotide polymophisms,SNPs)位点的筛选;再以两群体的子代为材料,采用snapshot法对筛选到的SNPs进行基因分型,并利用一般线性模型(general linear model,GLM)对基因型与生长性状进行相关性分析。结果表明,从两个尼罗罗非鱼群体的GHSR基因中共获得S1(A-409G)、S2(G-424T)、S3(T-553A)、S4(T-1114A)和S5(A-1168C)等5个SNPs位点,且均分布于该基因5′侧翼区。SNPs基因型与尼罗罗非鱼子代生长指标关联性分析结果表明,当S4位点为AA或AT基因型时,尼罗罗非鱼个体的体重、体长、体高、头长、尾柄长和尾柄高等生长指标均显著大于S4位点基因型为TT的个体(P〈0.05),快长群体子代中S4位点AT基因型频率最高(55%),而在基础群体子代中TT基因型频率最高(75.94%)。5个SNPs位点不同基因型组成了7种双倍型(D1~7),其中D3和D5双倍型个体的体重、体长、体高、头长、尾柄高等生长指标显著高于D4和D7双倍型个体(P〈0.05);而D1(体宽除外)、D2(体宽和尾柄长除外)和D6(体高除外)双倍型个体与其他双倍型个体之间在生长指标上均无显著差异(P〉0.05)。快长群体子代和基础群体子代中的优势双倍型分别为D3双倍型(46.25%)和D4双倍型(35.44%)。因此,尼罗罗非鱼GHSR基因中S4位点处AA、AT基因型及双倍型D3、D5与快长性状密切相关,可作为尼罗罗非鱼分子标记辅助育种的候选标记。
Bibliography:WANG Chun-Xiao LU Mai-Xin GAO Feng-Ying LIU Zhi-Gang CAO Jian-Meng ZHU Hua- Ping KE Xiao-Li WANG Miao YE Xing YE Wei( 1 Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; 2 College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; 3 Famous Freshwater Fish Seeding Breeding Center of Guangdong Province, Guangzhou 511453, China)
11-3342/S
Nile tilapia (Oreochromis niloticus), Growth hormone secretagogue receptor gene (GHSR), Singlenucleotide polymorphisms (SNPs), Growth traits
PCR amplification and direct sequencing were used for single nucleotide polymophisms (SNPs) searching from growth hormone secretagogue receptor gene (GHSR) of the 2 populations of Nile tilapia (Oreochromis niloticus) (i.e., Fast-growing population and Base population). Snapshot method was used for genotyping of SNPs, and the correlation between genotyp
ISSN:1674-7968