{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T16:14:09Z","timestamp":1790266449212,"version":"4.1.0"},"reference-count":90,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T00:00:00Z","timestamp":1787702400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Plant Sci."],"abstract":"<jats:p>\n                    Winter wheat plays a viable role in agriculture, not only as a primary grain crop but also as a valuable forage source that bridges fall-spring forage gaps in many regions, including the southeastern (SE) U.S. Despite its nutritive potential, genetic basis of forage-quality traits remains insufficiently understood, limiting breeding efforts for dual-purpose cultivars. This study aimed to dissect the genetic architecture of forage quality in 182 soft red winter wheat (SRWW) genotypes adapted to the SE U.S. using genome-wide association study (GWAS). Field experiments were carried out in randomized complete block design across three Georgia locations over two growing seasons (2023-2025), with forage sampled at the end of tillering and evaluated using near-infrared reflectance spectroscopy. Significant phenotypic variation was observed for dry matter (DM), crude protein (CP), acid and neutral detergent fiber (ADF, NDF), acid detergent lignin (ADL), total digestible nutrients (TDN), sugars (SUG), and relative forage quality (RFQ). Heritability estimates ranged from low-to-moderate in combined environments and from low-to-high within individual locations. Correlation analysis revealed strong positive associations among fiber-related traits and negative associations with TDN, RFQ, and SUG, while CP declined with increasing fiber. Genome-wide association analysis identified 282 significant marker-trait associations (P\u2009&amp;lt;\u20091\u00d710\n                    <jats:sup>-4<\/jats:sup>\n                    ) across 19 chromosomes, which were consolidated into 121 QTLs, including 27 major-effect QTLs. Three QTLs\n                    <jats:italic>QRfq.uga-3B.1<\/jats:italic>\n                    ,\n                    <jats:italic>QRfq.uga-3B.2<\/jats:italic>\n                    (RFQ) and\n                    <jats:italic>QDm\/Sug.uga-7A<\/jats:italic>\n                    (DM, SUG) were stable across locations while\n                    <jats:italic>QAdf\/Adl.uga-2A<\/jats:italic>\n                    (ADF, ADL) and\n                    <jats:italic>QDm\/Sug.uga-7A<\/jats:italic>\n                    (DM, SUG) indicated multi-trait control. Notably, 25 of the 27 major QTLs were putatively novel, highlighting substantial untapped allelic diversity for forage-quality improvement in SE SRWW. Favorable allele accumulation resulted in an overall improvement in forage quality, increasing desirable nutritive traits (DM, RFQ, SUG, CP) while reducing undesirable traits (ADF, ADL). Candidate gene analysis linked six major QTLs with genes implicated in abiotic stress response, plant development, and metabolic regulation, supporting their functional relevance in forage-quality determination. Incorporating these loci into breeding programs provides a robust genetic framework for marker-assisted selection, enabling the development of dual-purpose wheat cultivars with enhanced forage quality, thereby strengthening wheat\u2019s utility as a reliable forage resource during periods of seasonal feed scarcity in SE production systems.\n                  <\/jats:p>","DOI":"10.3389\/fpls.2026.1893113","type":"journal-article","created":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T06:02:51Z","timestamp":1787724171000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Dissecting the genetics of forage quality traits in soft red winter wheat in the U.S. southeast region"],"prefix":"10.3389","volume":"17","author":[{"given":"Maria","family":"Ali","sequence":"first","affiliation":[{"name":"Department of Crop and Soil Sciences, University of Georgia","place":["Griffin, GA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali","family":"Missaoui","sequence":"additional","affiliation":[{"name":"Department of Crop and Soil Sciences, University of Georgia","place":["Griffin, GA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gina","family":"Brown-Guedira","sequence":"additional","affiliation":[{"name":"USDA-ARS Plant Science Research","place":["Raleigh, NC, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Uttam","family":"Saha","sequence":"additional","affiliation":[{"name":"Agricultural and Environmental Services Laboratories, University of Georgia Cooperative Extension","place":["Athens, GA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohamed","family":"Mergoum","sequence":"additional","affiliation":[{"name":"Department of Crop and Soil Sciences, University of Georgia","place":["Griffin, GA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,8,26]]},"reference":[{"key":"B1","first-page":"13","article-title":"Wheat data integration and FAIRification: IWGSC, GrainGenes, Ensembl and other data repositories","volume-title":"The Wheat Genome","author":"Alaux","year":"2023"},{"key":"B2","doi-asserted-by":"publisher","first-page":"111","DOI":"10.1186\/s13059-018-1491-4","article-title":"Linking the International Wheat Genome Sequencing Consortium bread wheat reference genome sequence to wheat genetic and phenomic data","volume":"19","author":"Alaux","year":"2018","journal-title":"Genome Biol."},{"key":"B3","doi-asserted-by":"publisher","first-page":"119","DOI":"10.1016\/j.jare.2019.10.013","article-title":"GWAS: Fast-forwarding gene identification and characterization in temperate cereals: lessons from barley, a review","volume":"22","author":"Alqudah","year":"2020","journal-title":"J. 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