دورية أكاديمية
Genome-wide association study reveals that different pathways contribute to grain quality variation in sorghum (Sorghum bicolor)
| العنوان: | Genome-wide association study reveals that different pathways contribute to grain quality variation in sorghum (Sorghum bicolor) |
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| المؤلفون: | Kimani, Wilson, Zhang, Li-Min, Wu, Xiao-Yuan, Hao, Huai-Qing, Jing, Hai-Chun |
| بيانات النشر: | BMC |
| سنة النشر: | 2020 |
| المجموعة: | Institute of Botany: IBCAS OpenIR (Chinese Academy Of Sciences) / 中国科学院植物研究所机构知识库 |
| مصطلحات موضوعية: | Sorghum, Grain quality, Genome-wide association study, Amino acids, Starch, Tannins, Biotechnology & Applied Microbiology, Genetics & Heredity, MAIZE KERNEL COMPOSITION, SEED COAT DEVELOPMENT, ARABIDOPSIS, ENCODES, PROTEIN, GENE, IDENTIFICATION, DIGESTIBILITY, INTEGRATION, EXPRESSION |
| الوصف: | Background In sorghum (Sorghum bicolor), one paramount breeding objective is to increase grain quality. The nutritional quality and end use value of sorghum grains are primarily influenced by the proportions of tannins, starch and proteins, but the genetic basis of these grain quality traits remains largely unknown. This study aimed to dissect the natural variation of sorghum grain quality traits and identify the underpinning genetic loci by genome-wide association study. Results Levels of starch, tannins and 17 amino acids were quantified in 196 diverse sorghum inbred lines, and 44 traits based on known metabolic pathways and biochemical interactions amongst the 17 amino acids calculated. A Genome-wide association study (GWAS) with 3,512,517 SNPs from re-sequencing data identified 14, 15 and 711 significant SNPs which represented 14, 14, 492 genetic loci associated with levels of tannins, starch and amino acids in sorghum grains, respectively. Amongst these significant SNPs, two SNPs were associated with tannin content on chromosome 4 and colocalized with three previously identified loci for Tannin1, and orthologs of Zm1 and TT16 genes. One SNP associated with starch content colocalized with sucrose phosphate synthase gene. Furthermore, homologues of opaque1 and opaque2 genes associated with amino acid content were identified. Using the KEGG pathway database, six and three candidate genes of tannins and starch were mapped into 12 and 3 metabolism pathways, respectively. Thirty-four candidate genes were mapped into 16 biosynthetic and catabolic pathways of amino acids. We finally reconstructed the biosynthetic pathways for aspartate and branched-chain amino acids based on 15 candidate genes identified in this study. Conclusion Promising candidate genes associated with grain quality traits have been identified in the present study. Some of them colocalized with previously identified genetic regions, but novel candidate genes involved in various metabolic pathways which influence grain quality traits have been ... |
| نوع الوثيقة: | article in journal/newspaper report |
| اللغة: | English |
| العلاقة: | BMC GENOMICS; http://ir.ibcas.ac.cn/handle/2S10CLM1/21910Test |
| DOI: | 10.1186/s12864-020-6538-8 |
| الإتاحة: | https://doi.org/10.1186/s12864-020-6538-8Test http://ir.ibcas.ac.cn/handle/2S10CLM1/21910Test |
| حقوق: | cn.org.cspace.api.content.CopyrightPolicy@23604648 |
| رقم الانضمام: | edsbas.A0807319 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1186/s12864-020-6538-8 |
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