biostudies-literatureUnknown16Gebeyehu ANoug (<i>Guizotia abyssinica</i>) is a vital Ethiopian oilseed crop lacking comprehensive genomic resources. This study constructed the first high-density SNP-based linkage map for this diploid species (2n=30, genome size ~1.7 Gb). Using an F<sub>2</sub> mapping population of 286 individuals, we generated 13,888 high-quality SNPs from genotyping-by-sequencing (GBS), which were mapped onto 15 linkage groups (LGs) with a mean marker density of 2.1 cM, covering 90.6% of the genome. Phenotypic evaluation revealed significant variation for nine agronomic traits, including plant height (110-292 cm), days to flowering (49-115 days), and oil content (13.88-55.62%). Quantitative trait loci (QTL) mapping identified 27 QTL for six traits. Major findings include a flowering time QTL (qDTF-9-1) on LG9 Frontiers in plant science1662582https://www.ebi.ac.uk/biostudies/studies/S-EPMC12454408biostudies-literatureSNP-based linkage mapping reveals novel quantitative trait loci for yield traits in noug (<i>Guizotia abyssinica</i> (L. f.) Cass.).PMC12454408Hammenhag CGeleta MGebeyehu AOrtiz RVetukuri RRfalseSNP-based linkage mapping reveals novel quantitative trait loci for yield traits in noug (<i>Guizotia abyssinica</i> (L. f.) Cass.).Noug (<i>Guizotia abyssinica</i>) is a vital Ethiopian oilseed crop lacking comprehensive genomic resources. This study constructed the first high-density SNP-based linkage map for this diploid species (2n=30, genome size ~1.7 Gb). Using an F<sub>2</sub> mapping population of 286 individuals, we generated 13,888 high-quality SNPs from genotyping-by-sequencing (GBS), which were mapped onto 15 linkage groups (LGs) with a mean marker density of 2.1 cM, covering 90.6% of the genome. Phenotypic evaluation revealed significant variation for nine agronomic traits, including plant height (110-292 cm), days to flowering (49-115 days), and oil content (13.88-55.62%). Quantitative trait loci (QTL) mapping identified 27 QTL for six traits. Major findings include a flowering time QTL (qDTF-9-1) on LG9 2025-01-01T00:00:00Z20252026-05-01T03:23:25.476Z2026-05-01T03:11:08.089ZS-EPMC124544084099501110.3389/fpls.2025.1662582