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ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Research Project #430107

Research Project: Development of Molecular Markers for Selection of Lettuce Genotypes with Resistance to Verticillium Race 1

Location: Crop Improvement and Protection Research

Project Number: 2038-21530-002-06-R
Project Type: Reimbursable Cooperative Agreement

Start Date: Oct 1, 2015
End Date: Jun 30, 2018

Objective:
Development of molecular markers for selection of lettuce genotypes with resistance to Verticillium race 1.

Approach:
Verticillium wilt is the disease caused by the soil borne fungus Verticillium dahliae. Verticillium wilt has devastating impacts on crops. Plants are often symptomless until they are near market maturity, when the disease develops quickly and often results in complete yield loss in affected fields. The best long-term control of the disease is based on host resistance. Development of resistant cultivars is most desirable, but the progress in breeding is hindered by very slow and labor intensive field-based testing. To make the breeding process more rapid and economically efficient, we will develop molecular markers that can be used to identify the genotypes with Vr1, the dominant gene for resistance to Verticillium wilt race 1. In addition, we will analyze Vr1 resistance homologs in resistant and susceptible accessions and study their relationship.