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Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum
A lack of understanding of host-by-pathogen relations can hinder the success of breeding for resistance to a major disease. Fungal strain pathogenicity has to be understood from the virulence it can cause on susceptible genotypes and host resistance indicates which genotypes have resistance genes. W...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4107276/ https://www.ncbi.nlm.nih.gov/pubmed/24817586 http://dx.doi.org/10.1007/s00425-014-2081-7 |
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author | Mpofu, Leo T. McLaren, Neal W. |
author_facet | Mpofu, Leo T. McLaren, Neal W. |
author_sort | Mpofu, Leo T. |
collection | PubMed |
description | A lack of understanding of host-by-pathogen relations can hinder the success of breeding for resistance to a major disease. Fungal strain pathogenicity has to be understood from the virulence it can cause on susceptible genotypes and host resistance indicates which genotypes have resistance genes. Where the two worlds meet lies the place where researchers match the prevalent pathogen in the area of production with resistant varieties. This paper uses ergosterol concentration analysis as a measure of fungal biomass accumulation to assess levels of resistance in host genotypes. 11 sorghum genotypes were inoculated with 5 strains of fungi that are known to be associated with grain mold disease of sorghum. The resulting interaction was analyzed using GGE Biplot analysis and Cluster analysis which showed that none of the genotypes were resistant to Phoma sorghina and Curvularia lunata. Three genotypes were resistant to Fusarium thapsinum. One fungal strain (Alternaria alternata) does not contribute any significant damage in the grain mold disease. Fusarium graminearum causes very little grain mold disease. There was no correlation between the fungal strains. Visual scoring did not correlate with ergosterol accumulation. Resistance to grain mold in sorghum is shown to be due to vertical or specific resistance genes. Sorghum breeders should, therefore, identify predominant fungal strains in their localities and then locate and tag these resistance genes in their germplasm and pyramid them in commercial varieties. |
format | Online Article Text |
id | pubmed-4107276 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-41072762014-08-08 Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum Mpofu, Leo T. McLaren, Neal W. Planta Original Article A lack of understanding of host-by-pathogen relations can hinder the success of breeding for resistance to a major disease. Fungal strain pathogenicity has to be understood from the virulence it can cause on susceptible genotypes and host resistance indicates which genotypes have resistance genes. Where the two worlds meet lies the place where researchers match the prevalent pathogen in the area of production with resistant varieties. This paper uses ergosterol concentration analysis as a measure of fungal biomass accumulation to assess levels of resistance in host genotypes. 11 sorghum genotypes were inoculated with 5 strains of fungi that are known to be associated with grain mold disease of sorghum. The resulting interaction was analyzed using GGE Biplot analysis and Cluster analysis which showed that none of the genotypes were resistant to Phoma sorghina and Curvularia lunata. Three genotypes were resistant to Fusarium thapsinum. One fungal strain (Alternaria alternata) does not contribute any significant damage in the grain mold disease. Fusarium graminearum causes very little grain mold disease. There was no correlation between the fungal strains. Visual scoring did not correlate with ergosterol accumulation. Resistance to grain mold in sorghum is shown to be due to vertical or specific resistance genes. Sorghum breeders should, therefore, identify predominant fungal strains in their localities and then locate and tag these resistance genes in their germplasm and pyramid them in commercial varieties. Springer Berlin Heidelberg 2014-05-11 2014 /pmc/articles/PMC4107276/ /pubmed/24817586 http://dx.doi.org/10.1007/s00425-014-2081-7 Text en © The Author(s) 2014 https://creativecommons.org/licenses/by/4.0/ Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. |
spellingShingle | Original Article Mpofu, Leo T. McLaren, Neal W. Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
title | Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
title_full | Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
title_fullStr | Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
title_full_unstemmed | Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
title_short | Ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
title_sort | ergosterol concentration and variability in genotype-by-pathogen interaction for grain mold resistance in sorghum |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4107276/ https://www.ncbi.nlm.nih.gov/pubmed/24817586 http://dx.doi.org/10.1007/s00425-014-2081-7 |
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