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Genetics of resistance to Zymoseptoria tritici and applications to wheat breeding.
Fungal Genet Biol. 2015 Jun; 79:33-41.FG

Abstract

This paper reviews current knowledge about genes for resistance to Septoria tritici blotch (STB) of wheat, caused by Zymoseptoria tritici (formerly Mycosphaerella graminicola). These genes can be placed into two classes, although a few may have characteristics of both classes. Qualitative resistance is controlled by genes which control large fractions of genetic variation, 21 of which have been discovered and mapped so far. Most of them have been shown to be genotype-specific, being effective against the minority of Z. tritici isolates which are avirulent, and Stb6 has been shown to control a gene-for-gene relationship. Most qualitative resistances are unlikely to be durable and some formerly effective genes have been overcome by the evolution of pathogen virulence. Quantitative resistance is generally controlled by genes with small-to-moderate effects on STB. They have generally weaker specificity than qualitative genes and have provided more durable resistance. 89 genome regions carrying quantitative trait loci (QTL) or meta-QTL have been identified to date. Some QTL have been mapped at or near loci of qualitative genes, especially Stb6, which is present in several sources of resistance. Another gene of particular interest is Stb16q, which has been effective against all Z. tritici isolates tested so far. In addition to resistance, the susceptibility of wheat cultivars to STB can also be reduced by disease escape traits, some of which may be undesirable in breeding. The fundamental requirements for breeding for STB-resistance are genetic diversity for resistance in wheat germplasm and a field trial site at which STB epidemics occur regularly and effective selection can be conducted for resistance combined with other desirable traits. If these are in place, knowledge of resistance genes can be applied to improving control of STB.

Authors+Show Affiliations

John Innes Centre, Norwich Research Park, Colney, Norwich NR4 7UH, England, United Kingdom. Electronic address: james.brown@jic.ac.uk.John Innes Centre, Norwich Research Park, Colney, Norwich NR4 7UH, England, United Kingdom.INRA, UMR 1095, Genetics, Diversity and Ecophysiology of Cereals, F-63100 Clermont-Ferrand, France; UBP, UMR 1095, Genetics, Diversity and Ecophysiology of Cereals, F-63100 Clermont-Ferrand, France.INRA, UMR 1095, Genetics, Diversity and Ecophysiology of Cereals, F-63100 Clermont-Ferrand, France; UBP, UMR 1095, Genetics, Diversity and Ecophysiology of Cereals, F-63100 Clermont-Ferrand, France. Electronic address: cyrille.saintenac@clermont.inra.fr.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Review

Language

eng

PubMed ID

26092788

Citation

Brown, James K M., et al. "Genetics of Resistance to Zymoseptoria Tritici and Applications to Wheat Breeding." Fungal Genetics and Biology : FG & B, vol. 79, 2015, pp. 33-41.
Brown JK, Chartrain L, Lasserre-Zuber P, et al. Genetics of resistance to Zymoseptoria tritici and applications to wheat breeding. Fungal Genet Biol. 2015;79:33-41.
Brown, J. K., Chartrain, L., Lasserre-Zuber, P., & Saintenac, C. (2015). Genetics of resistance to Zymoseptoria tritici and applications to wheat breeding. Fungal Genetics and Biology : FG & B, 79, 33-41. https://doi.org/10.1016/j.fgb.2015.04.017
Brown JK, et al. Genetics of Resistance to Zymoseptoria Tritici and Applications to Wheat Breeding. Fungal Genet Biol. 2015;79:33-41. PubMed PMID: 26092788.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genetics of resistance to Zymoseptoria tritici and applications to wheat breeding. AU - Brown,James K M, AU - Chartrain,Laëtitia, AU - Lasserre-Zuber,Pauline, AU - Saintenac,Cyrille, PY - 2015/01/25/received PY - 2015/04/15/revised PY - 2015/04/18/accepted PY - 2015/6/21/entrez PY - 2015/6/21/pubmed PY - 2016/3/10/medline KW - Durable resistance KW - Gene-for-gene relationship KW - Genetic mapping KW - Plant breeding KW - Quantitative trait locus (QTL) KW - Septoria tritici blotch SP - 33 EP - 41 JF - Fungal genetics and biology : FG & B JO - Fungal Genet Biol VL - 79 N2 - This paper reviews current knowledge about genes for resistance to Septoria tritici blotch (STB) of wheat, caused by Zymoseptoria tritici (formerly Mycosphaerella graminicola). These genes can be placed into two classes, although a few may have characteristics of both classes. Qualitative resistance is controlled by genes which control large fractions of genetic variation, 21 of which have been discovered and mapped so far. Most of them have been shown to be genotype-specific, being effective against the minority of Z. tritici isolates which are avirulent, and Stb6 has been shown to control a gene-for-gene relationship. Most qualitative resistances are unlikely to be durable and some formerly effective genes have been overcome by the evolution of pathogen virulence. Quantitative resistance is generally controlled by genes with small-to-moderate effects on STB. They have generally weaker specificity than qualitative genes and have provided more durable resistance. 89 genome regions carrying quantitative trait loci (QTL) or meta-QTL have been identified to date. Some QTL have been mapped at or near loci of qualitative genes, especially Stb6, which is present in several sources of resistance. Another gene of particular interest is Stb16q, which has been effective against all Z. tritici isolates tested so far. In addition to resistance, the susceptibility of wheat cultivars to STB can also be reduced by disease escape traits, some of which may be undesirable in breeding. The fundamental requirements for breeding for STB-resistance are genetic diversity for resistance in wheat germplasm and a field trial site at which STB epidemics occur regularly and effective selection can be conducted for resistance combined with other desirable traits. If these are in place, knowledge of resistance genes can be applied to improving control of STB. SN - 1096-0937 UR - https://www.unboundmedicine.com/medline/citation/26092788/Genetics_of_resistance_to_Zymoseptoria_tritici_and_applications_to_wheat_breeding_ DB - PRIME DP - Unbound Medicine ER -