Research Objective
Phenotyping of the GWAS-2 pea panel for Aphanomyces root rot resistance; association mapping for identification of SNP markers associated with Aphanomyces root rot resistance; in silico comparison of identified loci with known QTLs of Aphanomyces resistance; field evaluation of selected GWAS-2 accessions for resistance to root rot complex.
Ten new sources of moderate resistance to ARR were identified among both the GWAS-2 and P. fulvum accessions. ARR severity in P. sativum accessions AAC Ardill, Melrose, PI 169608, CDC Blazer, PI 155109, PI 269802, AAC Aberdeen, Enigma – NIAB, W6 12739 and PI 344538 was rated as 36-45% compared to 86% in susceptible check CDC Meadow. ARR severity in P. fulvum accessions PI 560064 and PI 560065 was rated as 45% and 48.6% compared to 77.5% in CDC Meadow. The phenotypic and genotypic information of the GWAS-2 panel were used to identify two new molecular markers associated with ARR resistance.