Single-Nucleotide Polymorphisms in Bmy1 Intron III Alleles Conferring the Genotypic Variations in beta-Amylase Activity under Drought Stress between Tibetan Wild and Cultivated Barley
文献类型： 外文期刊
作者： Wu, Xiaojian 1 ; Yue, Wenhao 1 ; Cai, Kangfeng 1 ; Wang, Huan 2 ; Zeng, Fanrong 2 ; Wang, Junmei 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Key Lab Digital Dry Upland Crops Zhejiang Prov, 198 Shiqiao Rd, Hangzhou 310021, Peoples R China
2.Zhejiang Univ, Dept Agron, Zijingang Campus, Hangzhou 310058, Zhejiang, Peoples R China
关键词： drought; Bmy1 intron III allele; beta-amylase activity; cultivated barley (Hordeum vulgare L.); wild barley (Hoedeum spontaneum)
期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN：
年卷期： 2022 年 12 卷 8 期
页码：
收录情况： SCI
摘要： beta-amylase activity is related to the polymorphisms of Bmy1 intron III; however, no attention has been given to such relationships under environmental stresses such as drought. In this study, 73 cultivated barley genotypes and 52 Tibetan wild barley accessions were used to test the association between Bmy1 gene intron III polymorphisms and beta-amylase activity under drought stress. Our results showed that three alleles, Bmy1.a, Bmy1.b, and Bmy1.c, existed in the examined barley genotypes. Tibetan wild barley had a higher proportion of Bmy1.b, whereas cultivated barley showed a higher proportion of Bmy1.a. Impressively, barley genotypes with Bmy1.b showed a significant increase in beta-amylase activity under drought stress, compared with those with Bmy1.a or Bmy1.c, indicating that the Bmy1.b allele might provide more chances for developing barley cultivars with higher beta-amylase activity under water stress than both the Bmy1.a and Bmy1.c alleles. Furthermore, the Tibetan wild barley XZ147, belonging to the Bmy1.b allele type, showed significantly higher beta-amylase activity than Triumph under drought stress. This might be the result of the unique amino acid substitution M527 or the amino acid composition of R115, D165, A233, S347, and M527 of XZ147.
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