1.华中农业大学水产学院/华中农业大学鳜鱼研究中心,武汉430070
2.广东海大集团股份有限公司,广州 511400
缪云亮,E-mail:yunliangmiao@163.com
何珊,E-mail:heshan@mail.hzau.edu.cn
收稿:2024-05-25,
纸质出版:2025-09-15
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MIAO Yunliang,FAN Wangyuan,CHEN Boxiang,et al.Identification of SNPs in mstn and mtor gene of Siniperca chuatsi and their association with growth traits[J].Journal of Huazhong Agricultural University,2025,44(05):126-133.
缪云亮,范旺远,陈柏湘,等.翘嘴鳜mstn和mtor基因SNP位点鉴定及其与生长性状的关联分析[J].华中农业大学学报,2025,44(5):126‐133. DOI: 10.13300/j.cnki.hnlkxb.2025.05.013.
MIAO Yunliang,FAN Wangyuan,CHEN Boxiang,et al.Identification of SNPs in mstn and mtor gene of Siniperca chuatsi and their association with growth traits[J].Journal of Huazhong Agricultural University,2025,44(05):126-133. DOI: 10.13300/j.cnki.hnlkxb.2025.05.013.
为获得与翘嘴鳜(
Siniperca chuatsi
)生长性状相关的分子标记,辅助选育鳜优良品种,基于翘嘴鳜生长基因
mstn
和
mtor
的基因组DNA序列开展单核苷酸多态性(SNP)位点鉴定,并对这些位点进行生长性状的相关性分析。结果显示,2个基因筛查到mstn-in2、mtor-in26和mtor-E11共3个SNP位点,3个SNP位点多态信息含量(PIC)为0.280 8~0.372 9,在贵州和广东群体中均表现为中度多态性水平;标记-性状关联性分析显示:翘嘴鳜贵州群体中,mstn-in2位点为GG基因型的个体,其全长、体长和体质量的平均值均显著高于该位点为CC基因型的个体(
P
<
0.05)。翘嘴鳜广东群体中,mstn-in2位点为GG基因型的个体,其全长、体长、体高和体质量的平均值均显著高于该位点为CC基因型的个体(
P
<
0.05);mtor-in26位点为TT基因型的个体,其全长、体质量和肥满度平均值均显著高于该位点为TC基因型和CC基因型的个体(
P
<
0.05)。以上结果表明,mstn-in2位点GG基因型和mtor-in26位点TT基因型为生长优势基因型,可将
mstn
基因和
mtor
基因作为翘嘴鳜分子标记辅助育种的重要候选基因。
To identify molecular markers associated with growth traits in mandarin fish (
Siniperca chuatsi
) and to facilitate the selective breeding of superior varieties, single nucleotide polymorphism (SNP) loci were screened based on the genomic DNA sequences of the growth-related genes
mstn
and
mtor
.A subsequent correlation analysis between these loci and growth traits revealed the identification of three SNPs: mstn-in2, mtor-in26, and mtor-E11.The polymorphism information content (PIC) for these three SNPs ranged from 0.280 8 to 0.372 9, indicating moderate levels of polymorphism in both the Guizhou and Guangdong populations.Marker-trait association analysis revealed the following findings: In the Guizhou population, individuals with the GG genotype at the mstn-in2 locus exhibited significantly higher mean values for total length, body length, and body mass compared to those with the CC genotype (
P
<
0.05).Similarly, in the Guangdong population, individuals with the GG genotype at the mstn-in2 locus showed significantly higher mean values for total length, body length, body height, and body mass than those with the CC genotype (
P
<
0.05).Furthermore, in the Guangdong population, individuals with the TT genotype at the mtor-in26 locus exhitied significantly higher mean values for total length, body mass, and Fulton’s condition factor compared to those with the TC or CC genotypes (
P
<
0.05).These findings indicate that the GG genotype at the mstn-in2 locus and the TT genotype at the mtor-in26 locus are advantageous for growth.Therefore, the
mstn
and
mtor
genes are proposed as important candidate genes for molecular marker-assisted breeding programs in mandarin fish.
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