Skip to main content
ARS Home » Pacific West Area » Pullman, Washington » Plant Germplasm Introduction and Testing Research » Research » Research Project #432551

Research Project: Evaluation and Genotyping of New Pea Genetic Resources for Reaction to Powdery Mildew (Erysiphe pisi)

Location: Plant Germplasm Introduction and Testing Research

Project Number: 2090-21000-032-12-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Jul 1, 2018
End Date: Jun 30, 2019

Objective:
Identify USDA plant genetic resources of pea (Pisum sativum L.) accessions with resistance to powdery mildew.

Approach:
Evaluate 200 Chinese landrace core collection (Pisum sativum) accessions, 122 Core collection and all the P. abyssinicum and P. fulvum accessions (22 and 37, respectively) in the USDA collection plus 48 new P. fulvum from Israel (accessioning in progress) at two locations in 2018-19. A randomized complete block design with three replicates will be planted in disease nurseries at Corvallis, Oregon. Visual assessment of the disease severity will be completed with the onset of powdery mildew (late season). The disease severity key for powdery mildew of pea (0 to 10 scale) developed by Falloon et al. (1995) will be used in the disease assessment. The upper leaflet surfaces will be assessed.