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ARS Home » Southeast Area » Charleston, South Carolina » Vegetable Research » Research » Publications at this Location » Publication #422565
Research Project: Basic and Applied Approaches for Pest Management in Vegetable Crops

Location: Vegetable Research

Title: Identification of genetic loci associated with resistance to root-knot nematodes and insect pests of sweetpotato

Author
item Wadl, Phillip
item Baker, Hannah
item Wram, Catherine
item TANIGUTI, CRIS - Cornell University
item BASNET, BHOJA - Cornell University
item Coffey, John
item ZHAO, DONGYAN - Cornell University
item SLONECKI, TYLER - Cornell University
item SAPKOTA, MANOJ - Cornell University
item Rutter, William

Submitted to: National Sweetpotato Collaborators Group Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 1/28/2025
Publication Date: 4/16/2025
Citation: Wadl, P.A., Baker, H.E., Wram, C.L., Taniguti, C., Basnet, B., Coffey, J., Zhao, D., Slonecki, T.J., Sapkota, M., Rutter, W.B. 2025. Identification of genetic loci associated with resistance to root-knot nematodes and insect pests of sweetpotato. National Sweetpotato Collaborators Group Annual Meeting . https://doi.org/10.21273/HORTSCI.60.2S.S1.
DOI: https://doi.org/10.21273/HORTSCI.60.2S.S1

Interpretive Summary: N/A

Technical Abstract: Sweetpotato (Ipomoea batatas) is an important food crop and plays a pivotal role in preserving worldwide food security. Due to its polyploid genome, high heterogeneity, and phenotypic plasticity, sweetpotato genetic characterization and breeding can be difficult. Genome wide association studies (GWAS) can provide important resources for breeders to improve breeding efficiency and effectiveness. GWASpoly, was used to identify single nucleotide polymorphisms (SNPs) associated with resistance to root-knot nematodes and ground dwelling insect pests of sweetpotato. For resistance to Meloidogyne enterolobii, a SNP explaining 32% of the phenotypic variation was identified on chromosome 10, whereas a single SNP was identified on chromosome 1 for resistance to M. incognita that explained 25% of the variation. Two SNPs were identified on chromosomes 2 and 11 that are associated with resistance to flea beetles, with each explaining 10% of the phenotypic variation. For the wireworm-Diabrotica-Systena complex, a SNP explaining 10% of the variation was identified on chromosome 12. Lastly, on chromosome 2 a SNP accounting for 15% of the variation was identified. This information will be used to develop and validate Kompetitive Allele Specific PCR (KASP) markers for use in marker assisted selection in sweetpotato.