| 内蒙古白绒山羊褪黑激素受体基因SNP与产绒性状的关联 |
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| 引用本文： | 刘斌,赵存发,李玉荣,高凤芹,高娃,成立新,孟克巴雅尔,马跃军,刘少卿,李金泉.内蒙古白绒山羊褪黑激素受体基因SNP与产绒性状的关联[J].中国农业科学,2012,45(19):4092-4101. |
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| 作者姓名： | 刘斌 赵存发 李玉荣 高凤芹 高娃 成立新 孟克巴雅尔 马跃军 刘少卿 李金泉 |
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| 作者单位： | 1.内蒙古农业大学动物科学学院，呼和浩特 010018
2.内蒙古自治区农牧业科学院，呼和浩特010031
3.中国农业科学院草原研究所， 呼和浩特 010010
4.鄂托克前旗农牧业局，内蒙古鄂尔多斯 016200；5内蒙古白绒山羊种羊场，内蒙古鄂尔多斯 016100 |
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| 基金项目： | 国家绒毛用羊产业技术体系放牧营养调控岗位(CARS-40-12);内蒙古自治区科技计划项目(20110718);内蒙古农牧业科学院青年创新基金项目(2009QNJJM04) |
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| 摘 要： | 【目的】研究绒山羊褪黑激素受体（melatonin receptor，MTNR）基因的SNP与绒山羊产绒性状的关系，寻找可用于辅助选择的分子标记。【方法】以内蒙古阿尔巴斯型白绒山羊为研究对象，选择绒山羊褪黑激素受体（MTNR1a和MTNR1b）基因部分序列作为候选基因，采用PCR-SSCP分子标记技术和DNA测序技术研究其多态性，然后运用最小二乘方差分析方法，对各基因型间生产性状指标进行差异显著性检验。【结果】① 在绒山羊MTNR1a基因外显子1和2，以及MTNR1b基因外显子1没有检测到SSCP多态，而在绒山羊MTR1b基因外显子2中存在SSCP多态，首次检测到了3个SNP；② P4引物位点存在NM_001206907:g.648 bp处C-G突变，该突变没有导致氨基酸的改变；以及NM_001206907:g.665 bp处的G-A突变，该突变导致第223个密码子CGC变成CAC，从而使精氨酸变成组氨酸（Arg-His）；方差分析表明，该位点多态对绒山羊产绒量有显著影响（P＜0.05）；③AA基因型具有较高的产绒量，比AB、BB基因型产绒量分别高98.78和148.23 g，同时该多态位点基因型与年龄互作效应对绒山羊绒厚度有显著影响（P＜0.05）；④ P5引物位点存在NM_001206907:g.1 015 bp处的G-A突变，该突变导致第339个密码子GGC变成AGC，从而使甘氨酸变成丝氨酸（Gly-Ser），分析表明该多态位点基因型与年龄互作效应对绒山羊绒细度存在边际显著影响（P＜0.1）；⑤ 这两个位点多态对绒山羊产羔数量、羔羊初生体重等繁殖性状均无显著影响（P＞0.05）。【结论】P4-AA基因型可以作为内蒙古阿尔巴斯型白绒山羊产绒量性状辅助选择的标记基因型。
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| 关 键 词： | 绒山羊 褪黑激素受体基因 单核苷酸多态性 产绒性状 |
| 收稿时间： | 2012-02-27 |
Correlations Between SNP of MTNR Gene and Cashmere-Producing Traits of Inner Mongolia White Cashmere Goat |
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| LIU Bin,ZHAO Cun-fa,LI Yu-rong,GAO Feng-qin,GAO Wa,CHENG Li-xin,Mengkebayaer,MA Yue-jun,LIU Shao-qing,LI Jin-quan.Correlations Between SNP of MTNR Gene and Cashmere-Producing Traits of Inner Mongolia White Cashmere Goat[J].Scientia Agricultura Sinica,2012,45(19):4092-4101. |
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| Authors: | LIU Bin ZHAO Cun-fa LI Yu-rong GAO Feng-qin GAO Wa CHENG Li-xin Mengkebayaer MA Yue-jun LIU Shao-qing LI Jin-quan |
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| Institution: | 1(1College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018;2Academy of Agriculture and Stockbreeding Sciences,Inner Mongolia Autonomous Region,Hohhot 010031;3Grassland Research Institute,Chinese Academy of Agricultural Sciences,Hohhot 010010;4Etuokeqianqi Bureau of Agriculture and Animal Husbandry,Erdos 016200,Inner Mongolia;5Inner Mongolia White Cashmere Goat Breeding Farm,Erdos 016100,Inner Mongolia) |
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| Abstract: | 【Objective】Correlations between SNP of cashmere goat melatonin receptor (MTNR) gene and cashmere-producing traits were studied to find molecular marker of MAS for molecular breeding.【Method】 Arbas white cashmere goats and partial sequences of MTNR1a and 1b genes were used as experimental samples and candidate genes, respectively. PCR-SSCP and DNA sequencing technologies were conducted to detect their single nucleotide polymorphism. Results were analyzed by least square mean (LSM) among production traits of genotypes.【Result】 There was no SSCP in the exons 1 and 2 of MTNR1a gene and the exon 1 of MTNR1b gene, while there was the SSCP in the exon 2 of MTNR1b gene and three of SNP were detected. P4 primer loci existed in C-G mutation of NM_001206907:g.648 bp which didn’t result in change of amino acid, and G-A mutation of NM_001206907:g.665 bp which led to CGC-CAC of the 223rd codon from Arg into His. The results showed that polymorphism loci had an significant effect on cashmere yield (P＜0.05), and cashmere yield of AA genotype increased by 98.78 g and 148.23 g, as compared to AB and BB, respectively. Meanwhile, there was a significant correlation (P＜0.05) in interaction effect between the polymorphism loci genotype and age cashmere thickness. P5 primer loci existed in G-A mutation of NM_001206 907:g.1015 bp which led to GGC-AGC of the 339th codon from Gly into Ser. The analyses indicated that interaction effect of the polymorphism loci genotype and age was the marginal significant correlation (P＜0.1) with cashmere fineness. P4 and P5 primes locus were not significantly (P＞0.05) with kidding number and birth weight.【Conclusion】P4-AA genotype can be used as molecular marker of MAS for cashmere-producing traits of Inner Mongolian Arbas white cashmere goats. |
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| Keywords: | cashmere goat MTNR gene SNP cashmere-producing traits |
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