Responses to Selection for Partial Resistance to Crown Rust in Oat

dc.contributor.author Long, Jin
dc.contributor.author Holland, James
dc.contributor.author Munkvold, Gary
dc.contributor.author Jannink, Jean-Luc
dc.contributor.department Plant Pathology and Microbiology
dc.date 2018-02-17T05:37:35.000
dc.date.accessioned 2020-06-30T06:23:45Z
dc.date.available 2020-06-30T06:23:45Z
dc.date.issued 2006-01-01
dc.description.abstract <p>Crown rust, caused by the fungal pathogen, <em>Puccinia coronata</em> Corda var. <em>avenae</em> W.P. Fraser Ledingham, reduces kernel quality and grain yield in oat (<em>Avena sativa</em> L.). Partial resistance is considered to be a durable form of rust resistance. This study sought to evaluate the feasibility of simultaneously improving partial resistance to crown rust, grain yield, and seed weight in an oat population, and to estimate predicted and realized heritabilities for area under disease progress curve (AUDPC) and genetic correlations between AUDPC and agronomic traits in both crown rust-inoculated and fungicide-treated plots. A single cycle of selection for partial resistance to crown rust was performed. The initial (C<sub>0</sub>) and selected (C<sub>1</sub>) generations were evaluated in a field experiment in 2001 and 2002 at two Iowa locations. Selection on an index increased the levels of crown rust resistance, grain yield, and seed weight in crown rust−inoculated plots, and seed weight in fungicide-treated plots. However, the change for the grain yield in fungicide-treated plots was not significant. In both C<sub>0</sub> and C<sub>1</sub> populations, AUDPC was highly heritable (<em>H</em> = 0.77 and 0.78 respectively), and was favorably correlated with grain yield, seed weight, and test weight measured in inoculated plots. Realized heritabilities for all traits except grain yield under fungicide treatment were consistent with predicted heritabilities. Our results suggested that index selection could increase levels of crown rust resistance, grain yield, and seed weight simultaneously.</p>
dc.description.comments <p>This article is from <em>Crop science</em> 46 (2006): 1260, doi:<a href="http://dx.doi.org/10.2135/cropsci2005.06-0169" target="_blank">10.2135/cropsci2005.06-0169</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/plantpath_pubs/59/
dc.identifier.articleid 1054
dc.identifier.contextkey 7831245
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath plantpath_pubs/59
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/57775
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/plantpath_pubs/59/2005_Munkvold_ResponsesSelection.pdf|||Sat Jan 15 01:03:14 UTC 2022
dc.source.uri 10.2135/cropsci2005.06-0169
dc.subject.disciplines Plant Biology
dc.subject.disciplines Plant Pathology
dc.subject.disciplines Plant Sciences
dc.title Responses to Selection for Partial Resistance to Crown Rust in Oat
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 9918c387-ba25-48be-aa74-3bb209d5b47a
relation.isOrgUnitOfPublication a26b5928-54bb-4a0b-a973-95d649d1ad83
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