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ARS Home » Pacific West Area » Pullman, Washington » Plant Germplasm Introduction and Testing Research » Research » Publications at this Location » Publication #347409

Research Project: Management of Plant Genetic Resources and Associated Information

Location: Plant Germplasm Introduction and Testing Research

Title: Harvesting the Pea Genome: Association Mapping of the Pisum Single Plant Plus Collection

Author
item Coyne, Clarice - Clare
item Smitchger, Jamin - Washington State University
item Ma, Yu - Washington State University
item Allen, Crystal - Washington State University
item Mcgee, Rebecca
item Main, Dorrie - Washington State University

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/12/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary: None.

Technical Abstract: Yield per se is a difficult trait to improve due to the quantitative nature and low heritability of this trait. Nevertheless, yield is the most important trait for crop improvement. Development of higher yielding pea cultivars will depend on harvesting allelic diversity harbored in ex situ germplasm collections. Exciting new approaches are emerging around association studies and genomic selection within large germplasm collections. Recently, a 66K SNP genotyping of the USDA pea core collection was published (Holdsworth et al 2017). We did an association analysis on yield component data collected on the USDA pea core in 2016 and 2017 (averaged across both site years). We report significant marker-trait associations for yield, plant height, pods per plant, seeds per pod, pods per peduncle, heading date, % germination, nodes to first flower, days to flowering, flowers per peduncle, and seed per pod. Significant SNPs will be converted to breeder-friendly KASP assays for application in pea breeding programs.