Genome-Wide Association Study Reveals Novel Quantitative Trait Loci for Acid Detergent Fiber and Neutral Detergent Fiber in a Diverse Collection of Turkish Oat (<i>Avena</i> spp.) Genotypes
NEW ZEALAND JOURNAL OF CROP AND HORTICULTURAL SCIENCE, cilt.54, sa.3, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 54 Sayı: 3
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/nzc2.70210
- Dergi Adı: NEW ZEALAND JOURNAL OF CROP AND HORTICULTURAL SCIENCE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Periodicals Index Online, BIOSIS, Geobase, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Engineering Source (EBSCO)
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
Enhancing grain quality is a primary objective in oat (Avena sativa L.) breeding to meet the diversifying demands of the milling and livestock feed industries. This study employed a Genome-Wide Association Study (GWAS) to identify genomic regions associated with key quality traits: beta-glucan (BG), groat percentage (GP), acid detergent fiber (ADF), and neutral detergent fiber (NDF). A diverse panel of 167 oat genotypes, primarily sourced from T & uuml;rkiye, was evaluated over three cropping years (2016, 2017, and 2019) and genotyped using a 6K SNP chip. Significant phenotypic variation (p < 0.01) was observed among genotypes for all traits except BG. Correlation analysis revealed significant positive relationships between NDF and protein content (PC) (r = 0.1491*), as well as between NDF and ADF (r = 0.1971**). Association mapping identified 21 significant SNP markers linked to the investigated traits. Notably, the QTLs identified for ADF and NDF represent some of the first reported genomic regions for these traits in oat literature. These findings provide novel genomic resources for marker-assisted selection (MAS) to improve fiber components and overall grain quality in oat breeding programs.