Campus Units

Animal Science, Plant Pathology and Microbiology

Document Type

Article

Publication Version

Published Version

Publication Date

3-2021

Journal or Book Title

Frontiers in Plant Science

Volume

12

First Page

644746

DOI

10.3389/fpls.2021.644746

Abstract

In this study, four recombinant inbred line (RIL) soybean populations were screened for their response to infection by Pythium sylvaticum, Pythium irregulare, Pythium oopapillum, and Pythium torulosum. The parents, PI 424237A, PI 424237B, PI 408097, and PI 408029, had higher levels of resistance to these species in a preliminary screening and were crossed with “Williams,” a susceptible cultivar. A modified seed rot assay was used to evaluate RIL populations for their response to specific Pythium species selected for a particular population based on preliminary screenings. Over 2500 single-nucleotide polymorphism (SNP) markers were used to construct chromosomal maps to identify regions associated with resistance to Pythium species. Several minor and large effect quantitative disease resistance loci (QDRL) were identified including one large effect QDRL on chromosome 8 in the population of PI 408097 × Williams. It was identified by two different disease reaction traits in P. sylvaticum, P. irregulare, and P. torulosum. Another large effect QDRL was identified on chromosome 6 in the population of PI 408029 × Williams, and conferred resistance to P. sylvaticum and P. irregulare. These large effect QDRL will contribute toward the development of improved soybean cultivars with higher levels of resistance to these common soil-borne pathogens.

Comments

This article is published as Clevinger EM, Biyashev R, Lerch-Olson E, Yu H, Quigley C, Song Q, Dorrance AE, Robertson AE and Saghai Maroof MA (2021) Identification of Quantitative Disease Resistance Loci Toward Four Pythium Species in Soybean. Front. Plant Sci. 12:644746. doi:10.3389/fpls.2021.644746.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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