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作物学报 ›› 2014, Vol. 40 ›› Issue (02): 205-213.

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

Amy6-4基因遗传多样性及其与α-淀粉酶活性的关联分析

姜晓东1,2,郭刚刚1,张京1,*   

  1. 1 中国农业科学院作物科学研究所, 北京 100081; 2山西农业大学农学院, 山西太谷 030801
  • 收稿日期:2013-06-22 修回日期:2013-09-16 出版日期:2014-02-12 网络出版日期:2013-11-14
  • 通讯作者: 张京, E-mail: zhangjing03@caas.cn, Tel: 010-62189624
  • 基金资助:

    本研究国家公益性行业(农业)科研专项(3-29)和国家现代农业产业技术体系建设专项(CARS-05)资助。

Association of Genetic Diversity for Amy6-4 Gene with α-Amylase Activity in Germplasm of Barley

JIANG Xiao-Dong1,2,GUO Gang-Gang1,ZHANG Jing1,*   

  1. 1 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 2 College of Agronomy, Shanxi Agricultural University, Taigu 030801, China
  • Received:2013-06-22 Revised:2013-09-16 Published:2014-02-12 Published online:2013-11-14
  • Contact: 张京, E-mail: zhangjing03@caas.cn, Tel: 010-62189624

摘要:

α-淀粉酶活性是影响大麦种子发芽和麦芽制作及啤酒酿造的重要性状, Amy6-4为编码高等电点的α-淀粉酶基因, 挖掘其高活性的等位变异对啤酒大麦的品种改良具有指导意义。通过对58份大麦品种中Amy6-4基因的重测序, 研究了该基因的核苷酸序列以及在品种间的遗传多样性, 并在群体结构分析的基础上, 进行了核苷酸多态性与α-淀粉酶活性的关联分析。结果表明, Amy6-4基因共存在7个单核苷酸变异位点(SNP), 构成5种单倍型。其中, H_3单倍型最普遍, 发生频率为51.7% (30/58); 其次为H_1单倍型, 发生频率为39.7% (23/58); 其他3种单倍型发生的频率约为10%。SNP位点及其构成的单倍型均与酶活性无关联性。

关键词: 大麦, 遗传多样性, 单倍型, 连锁不平衡, 关联分析

Abstract:

Amy6-4 is one of the genes codingα-amylase with high isoelectric point, which plays an important role in germination and malting process in barley (Hordeum vulgare L.). To detect the intervarietal polymorphism on Amy6-4 locus, we resequenced the Amy6-4 alleles in 58 barley varieties that are deposited in the germplasm bank of China, and analyzed the association of single nucleotide polymorphisms (SNPs) and haplotypes with α-amylase activity based on the population structure. A total of seven SNPs in five haplotypes were detected among the 58 barley entries. Haplotype H_3 was most popular with frequence of 51.7% (30/58) in the entries tested, and haplotype H_1 ranked the second with frequnce about 39.7% (23/58). However, the remaining three haplotypes only shared about 10% of the frequency. No SNP or haplotype was associated with α-amylase activity.

Key words: Barley, Genetic diversity, Haplotype, Linkage disequilibrium, Association analysis

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