Widening the peanut seed chemical composition: The case of a recombinant inbreed lines introgressed with genes from three different wild species

DE BLAS, F. J; SEIJO, J. GUILLERMO; COSTERO, B. P.; BRESSANO, M.; MARCHESINO, M.; GROSSO, N. R

Plant Genetic Resources Characterization and Utilization

Cambridge University Press

Lugar: Cambridge; Año: 2024

1479-2621

AbstractBackground: peanut (Arachis hypogaea L.) is an important row crop rich in oil, protein, vitamins and other micro-nutrients, consumed worldwide. The intensive selection of the cultigen resulted in favorable changes in yield, biochemical composition, and other agronomic traits, nevertheless, it has generated a narrow genetic basis for the development of new varieties with resistance to pests, diseases and environmental stresses. In this study we characterized for proximate and fatty acids composition a multi-resistant interspecific RIL population derived from three wild Arachis species and a cultivated elite peanut line that is being used to widen the genetic basis of the crop. The population was also genotyped with the 48K SNP array and used to detect QTL for oil, protein content, oleic and linoleic fatty acids percentage. Results: wide proximate composition was detected for the RIL population; interestingly we found the presence of 18 and 11 individuals with high values of oil and protein content, respectively and no undesirable traits for oil quality were introgressed from wild species in the whole population. Two major QTL were detected controlling oleic and linoleic fatty acid composition. Conclusion: wild species can, aside of introgressing resistance alleles to pest and diseases, successfully broaden the main proximate chemical of peanut seeds. The identification of candidate markers within for major effect QTL for the most important chemical traits open new opportunities for the development of highly nutritious and resistant peanut varieties.