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ARS Home » Plains Area » Fargo, North Dakota » Edward T. Schafer Agricultural Research Center » Sunflower and Plant Biology Research » Research » Research Project #433341

Research Project: Refining Genomic Tools for Sclerotinia Resistance and Agronomic Breeding of Sunflower-towards Dissection of the Resistance Phenotype

Location: Sunflower and Plant Biology Research

Project Number: 3060-21000-043-018-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Aug 1, 2018
End Date: Dec 31, 2020

The goal of this project is to advance the study of Sclerotinia sclerotiorum resistance in sunflower using germplasm and genomic resources developed from previous projects. Objectives are to use the results from our updated GWAS model to infer candidate genes and develop hypotheses on necrotrophic disease resistance architecture, and complete development of genomics infrastructure for genomic selection.

We will use the results of our updated genomewide association study (GWAS) model, validated by our genotyped and phenotyped breeding program of the last 10 years, to infer candidate genes and develop hypotheses on contrasting genetic architecture for Sclerotinia basal stalk rot, Sclerotinia head rot, and Phomopsis stalk canker. Resistance candidate gene lists will inform our next steps in going from quantitative trait loci to genes and better models of phenotype backed by physiology. At the same time, developing a core genomic marker framework with which to do routine genomic selection in the future will require evaluation of marker calling accuracy, adequateness of spacing to cover most of the genomic diversity in the breeding program, and to guide future genotyping work in the breeding program.