Journal article
Genome-wide association mapping of starch granule size distribution in common wheat
Journal of cereal science, Vol.77, pp.211-218
09/2017
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Abstract
Starch is a crucial component in wheat endosperm and plays an important role in processing quality. Endosperm of matured wheat grains contains two distinct starch granules (SG), referred to as larger A- and smaller B-granules. In the present study, 166 Chinese bread wheat cultivars planted in four environments were characterized for variation in SG size. A genome-wide association study (GWAS) using the 90 K SNP assay identified 23 loci for percentage volumes of A- and B-granules, and 25 loci for the ratio of A-/B-granules volumes, distributing on 15 chromosomes. Fifteen MTAs were associated with both the percentage volumes of A-, B-granules and the ratio of A-/B-granules volumes. MTAs IWB34623 and IWA3693 on chromosome 7A and IWB22624 and IWA4574 on chromosome 7B associated with the percentage volumes of A- and B-granules consistently identified in multiple environments were considered to be stable. Linear regression analysis showed a significantly negative correlation of the number of favorable alleles with the percentage volumes of A-granules and a significantly positive correlation between the number of favorable alleles and the percentage volumes of B-granules, respectively. The loci identified in this study and associated markers could provide basis for manipulating SG size to obtain superior noodle quality in wheat.
Details
- Title
- Genome-wide association mapping of starch granule size distribution in common wheat
- Creators
- Jieyun Li - Chinese Academy of Agricultural SciencesAwais Rasheed - Chinese Academy of Agricultural SciencesQi Guo - Chinese Academy of Agricultural SciencesYan Dong - Chinese Academy of Agricultural SciencesJindong Liu - Chinese Academy of Agricultural SciencesXianchun Xia - Chinese Academy of Agricultural SciencesYan Zhang - Chinese Academy of Agricultural SciencesZhonghu He - Chinese Academy of Agricultural Sciences
- Publication Details
- Journal of cereal science, Vol.77, pp.211-218
- Publisher
- Elsevier
- Grant note
- This work was supported by National Basic Research Program (2014CB138105), the National Natural Science Foundation of China (31461143021), Gene Transformation Projects (2016ZX08009003-004), and National Key Technology R&D Program of China (2014BAD01B05).
- Identifiers
- 991013088712902368
- Copyright
- © 2017 Elsevier Ltd. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article