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Acta Agron Sin ›› 2014, Vol. 40 ›› Issue (02): 205-213.

• CROP GENETICS & BREEDING · GERMPLASM RESOURCES · MOLECULAR GENETICS • Previous Articles     Next Articles

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 Online:2014-02-12 Published:2013-11-14
  • Contact: 张京, E-mail: zhangjing03@caas.cn, Tel: 010-62189624

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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