文献类型： 外文期刊

作者： Song, Jian-Min ¹ ; Arif, Muhammad ¹ ; Zhang, Meiping ¹ ; Sze, Sing-Hoi ⁴ ; Zhang, Hong-Bin ¹ ;

作者机构： 1.Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843 USA

2.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Shandong, Peoples R China

3.NIBGE, Agr Biotechnol Div, Jhang Rd,POB 577, Faisalabad, Pakistan

4.Texas A&M Univ, Dept Comp Sci & Engn, College Stn, TX 77843 USA

5.Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA

关键词： Oryza sativa L.; Amylose content (AC); Grain protein content (GPC); Alkali spreading value (ASV); Genetic diversity; Single nucleotide polymorphism (SNP); Genome-wide association study (GWAS)

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2019 年 284 卷

页码：

收录情况： SCI

摘要： Grain quality is a major breeding objective and paramount to food production. This study was aimed to phenotypically and molecularly dissect the rice grain quality, especially amylose content (AC), grain protein content (GPC) and alkali spreading value (ASV), using the USDA rice mini-core collection representing the world-wide rice germplasm lines. Grain chemical analysis combined with genome-wide association study (GWAS) was used for the study. A wide genetic variation was observed for these grain quality traits in the mini-core collection. Germplasm lines unique in AC, GPC and ASV and desirable for grain quality improvement were identified. The genetic diversity of the collection was re-analyzed using new SNPs, thus providing a more precise genotypic information about the collection. Furthermore, ten loci significantly associated with these grain quality traits were identified through GWAS using 22947 high-quality SNPs. These results, therefore, provide knowledge, resources and molecular tools for efficient rice grain quality improvement.