Tags

Type your tag names separated by a space and hit enter

Sources of resistance and susceptibility to Septoria tritici blotch of wheat.
Mol Plant Pathol. 2017 02; 18(2):276-292.MP

Abstract

An association genetics analysis was conducted to investigate the genetics of resistance to Septoria tritici blotch, caused by the fungus Zymoseptoria tritici (alternatively Mycosphaerella graminicola), in cultivars and breeding lines of wheat (Triticum aestivum) used in the UK between 1860 and 2000. The population was tested with Diversity Array Technology (DArT) and simple-sequence repeat (SSR or microsatellite) markers. The lines formed a single population with no evidence for subdivision, because there were several common ancestors of large parts of the pedigree. Quantitative trait loci (QTLs) controlling Septoria resistance were postulated on 11 chromosomes, but 38% of variation was not explained by the identified QTLs. Calculation of best linear unbiased predictions (BLUPs) identified lineages of spring and winter wheat carrying different alleles for resistance and susceptibility. Abundant variation in Septoria resistance may be exploited by crossing well-adapted cultivars in different lineages to achieve transgressive segregation and thus breed for potentially durable quantitative resistance, whereas phenotypic selection for polygenic quantitative resistance should be effective in breeding cultivars with increased resistance. The most potent allele reducing susceptibility to Septoria, on chromosome arm 6AL, was associated with reduced leaf size. Genes which increase susceptibility to Septoria may have been introduced inadvertently into UK wheat breeding programmes from cultivars used to increase yield, rust resistance and eyespot resistance between the 1950s and 1980s. This indicates the need to consider trade-offs in plant breeding when numerous traits are important and to be cautious about the use of non-adapted germplasm.

Authors+Show Affiliations

John Innes Centre, Norwich Research Park, Colney, Norwich, NR4 7UH, UK.John Innes Centre, Norwich Research Park, Colney, Norwich, NR4 7UH, UK.

Pub Type(s)

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

Language

eng

PubMed ID

27558898

Citation

Arraiano, Lia S., and James K M. Brown. "Sources of Resistance and Susceptibility to Septoria Tritici Blotch of Wheat." Molecular Plant Pathology, vol. 18, no. 2, 2017, pp. 276-292.
Arraiano LS, Brown JK. Sources of resistance and susceptibility to Septoria tritici blotch of wheat. Mol Plant Pathol. 2017;18(2):276-292.
Arraiano, L. S., & Brown, J. K. (2017). Sources of resistance and susceptibility to Septoria tritici blotch of wheat. Molecular Plant Pathology, 18(2), 276-292. https://doi.org/10.1111/mpp.12482
Arraiano LS, Brown JK. Sources of Resistance and Susceptibility to Septoria Tritici Blotch of Wheat. Mol Plant Pathol. 2017;18(2):276-292. PubMed PMID: 27558898.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sources of resistance and susceptibility to Septoria tritici blotch of wheat. AU - Arraiano,Lia S, AU - Brown,James K M, Y1 - 2016/10/20/ PY - 2016/02/06/received PY - 2016/08/22/revised PY - 2016/08/22/accepted PY - 2016/10/22/pubmed PY - 2017/7/5/medline PY - 2016/8/26/entrez KW - Septoria tritici blotch KW - Zymoseptoria tritici KW - association genetics KW - breeding for disease resistance KW - trade-offs KW - wheat SP - 276 EP - 292 JF - Molecular plant pathology JO - Mol Plant Pathol VL - 18 IS - 2 N2 - An association genetics analysis was conducted to investigate the genetics of resistance to Septoria tritici blotch, caused by the fungus Zymoseptoria tritici (alternatively Mycosphaerella graminicola), in cultivars and breeding lines of wheat (Triticum aestivum) used in the UK between 1860 and 2000. The population was tested with Diversity Array Technology (DArT) and simple-sequence repeat (SSR or microsatellite) markers. The lines formed a single population with no evidence for subdivision, because there were several common ancestors of large parts of the pedigree. Quantitative trait loci (QTLs) controlling Septoria resistance were postulated on 11 chromosomes, but 38% of variation was not explained by the identified QTLs. Calculation of best linear unbiased predictions (BLUPs) identified lineages of spring and winter wheat carrying different alleles for resistance and susceptibility. Abundant variation in Septoria resistance may be exploited by crossing well-adapted cultivars in different lineages to achieve transgressive segregation and thus breed for potentially durable quantitative resistance, whereas phenotypic selection for polygenic quantitative resistance should be effective in breeding cultivars with increased resistance. The most potent allele reducing susceptibility to Septoria, on chromosome arm 6AL, was associated with reduced leaf size. Genes which increase susceptibility to Septoria may have been introduced inadvertently into UK wheat breeding programmes from cultivars used to increase yield, rust resistance and eyespot resistance between the 1950s and 1980s. This indicates the need to consider trade-offs in plant breeding when numerous traits are important and to be cautious about the use of non-adapted germplasm. SN - 1364-3703 UR - https://www.unboundmedicine.com/medline/citation/27558898/Sources_of_resistance_and_susceptibility_to_Septoria_tritici_blotch_of_wheat_ L2 - https://doi.org/10.1111/mpp.12482 DB - PRIME DP - Unbound Medicine ER -