SNP-based linkage mapping reveals novel quantitative trait loci for yield traits in noug (<i>Guizotia abyssinica</i> (L. f.) Cass.).

ABSTRACT: Noug (Guizotia abyssinica) 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 F₂ 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

SUBMITTER: Gebeyehu A 

PROVIDER: S-EPMC12454408 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature