Candidate genes for common scab (Streptomyces scabies) and drought resistance in potato as revealed by genome-wide association studies (GWAS)

Citation

Candidate genes for common scab (Streptomyces scabies) and drought resistance in potato as revealed by genome-wide association studies (GWAS)
Bourlaye Fofana, Mohsin Zaidi,, and David MAIN
Charlottetown Research and Development Centre, Agriculture and Agri-Food Canada, 440 University Avenue, Charlottetown, Prince Edward Island, C1A 4N6, Canada

*bourlaye.fofana@agr.gc.ca
Potato scab (Streptomyces scabies) is widespread in all potato growing regions, and it significantly reduces potato quality and marketability. Drought, as an abiotic stress, is a major threat to crop productivity. Currently, the genome-wide architecture of the genetic control of these two traits are limited in potato. Here, we used a genome-wide association studies on a 384 diploid potato germplasm panel to determine the potato genomic regions and the genes potentially associated with resistance to scab and drought. Here, we show that three candidate genes located in a 0.5- 5 kb genomic region of chromosome 7 are associated with scab resistance. Furthermore, two major QTNs located on chromosome 5, explained by 16 and 32% of phenotypic variations were found associated with 25 candidate genes. The data will be presented and discussed in a context of global changing climate.

Résumé

Candidate genes for common scab (Streptomyces scabies) and drought resistance in potato as revealed by genome-wide association studies (GWAS)
Bourlaye Fofana, Mohsin Zaidi,, and David MAIN
Charlottetown Research and Development Centre, Agriculture and Agri-Food Canada, 440 University Avenue, Charlottetown, Prince Edward Island, C1A 4N6, Canada

*bourlaye.fofana@agr.gc.ca
Potato scab (Streptomyces scabies) is widespread in all potato growing regions, and it significantly reduces potato quality and marketability. Drought, as an abiotic stress, is a major threat to crop productivity. Currently, the genome-wide architecture of the genetic control of these two traits are limited in potato. Here, we used a genome-wide association studies on a 384 diploid potato germplasm panel to determine the potato genomic regions and the genes potentially associated with resistance to scab and drought. Here, we show that three candidate genes located in a 0.5- 5 kb genomic region of chromosome 7 are associated with scab resistance. Furthermore, two major QTNs located on chromosome 5, explained by 16 and 32% of phenotypic variations were found associated with 25 candidate genes. The data will be presented and discussed in a context of global changing climate.

Date de publication

2023-01-14

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