文献类型： 外文期刊
作者： Wang, Junmei 1 ; Wu, Xiaojian 1 ; Yue, Wenhao 1 ; Zhao, Chenchen 2 ; Yang, Jianming 1 ; Zhou, Meixue 2 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou, Peoples R China
2.Univ Tasmania, Tasmanian Inst Agr, Prospect, Tas, Australia
关键词： Barley (Hordeum vulgare L.); Grain size; Quantitative trait loci; Molecular marker
期刊名称：PEERJ （ 影响因子：2.379； 五年影响因子：2.81 ）
ISSN： 2167-8359
年卷期： 2021 年 9 卷
页码：
收录情况： SCI
摘要： Background. Barley grain size is one of the key factors determining storage capacity during grain filling. Large, well-filled grains also have a high malt extract potential. Grain size is a complex quantitative trait and can be easily affected by environmental factors thus the identification of genes controlling the trait and the use of molecular markers linked to the genes in breeding program is the most effective way of improving grain size. Methods. Grain sizes of 188 doubled-haploid (DH) lines derived from the cross of a Japanese malting barley variety (Naso Nijo) and a Chinese feed barley variety (TX9425) were obtained from three different sites in two consecutive years. The average data were used for identifying QTL for grain size. Results. A total of four significant QTL were identified for grain length (GL) and three for grain width (GW). The two major GL QTL are located at similar positions to the QTL for malt extract on 2H and uzu gene on 3H, respectively. However, the GL QTL on 2H is more likely a different one from the malt extract QTL as most of the candidate genes are located outside the fine mapped QTL region for malt extract. The GL QTL on 3H is closely linked with uzu gene but not due to a pleiotropic effect of uzu. The three QTL for grain width on 1H, 2H and 5H, respectively, were located at same position to those for GL.
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