Genome wide association analysis of acid detergent fiber content of 206 forage sorghum (Sorghum bicolor (L.) Moench) accessions

Forage sorghum (Sorghum bicolor (L.) Moench) is a C4 cereal crop with excellent quality, which widely cultivated in many countries and regions. Acid detergent fiber found the stem leaf tissues of plant, main substance affecting digestibility livestock. It has very important impact on milk yield quality cows, dairy sheep pigs. In order to further understand its genetic mechanism, we re-sequenced 206 forage germplasms from different regions world identified 14,570,430 SNPs 1,967,033 indels. Based SNP markers, analyzed population structure gene loci related acid content by genome-wide association analysis (GWAS). Genetic relationship between materials showed that Asian American varieties, breeding lines improved varieties were more diverse, while European relatively closely related. These findings provide new clues directions for study. GWAS revealed 8 QTLs harboring 91 genes be associated content. significantly enriched into 6 major involved cell membrane material transport or enzymes, showing regional distribution. The basis us origin spread haplotypes will accelerate study gain help breeders improve feed stress tolerance sorghum.