Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat

Important advances have been made in understanding the relationship of necrotrophic effectors (NE) and host sensitivity (Snn) genes in the Parastagonospora nodorum-wheat pathosystem. Yet much remains to be learned about the role of these interactions in determining wheat resistance levels in the fie...

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Main Authors: Christina Cowger, Brian Ward, Gina Brown-Guedira, James K. M. Brown
Format: Article
Language:English
Published: Frontiers Media S.A. 2020-03-01
Series:Frontiers in Plant Science
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fpls.2020.00155/full
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spelling doaj-37d446bf71c64526966a836a4d450d752020-11-25T01:23:41ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2020-03-011110.3389/fpls.2020.00155508674Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. WheatChristina Cowger0Brian Ward1Gina Brown-Guedira2James K. M. Brown3U.S. Department of Agriculture – Agricultural Research Service, North Carolina State University, Raleigh, NC, United StatesU.S. Department of Agriculture – Agricultural Research Service, North Carolina State University, Raleigh, NC, United StatesU.S. Department of Agriculture – Agricultural Research Service, North Carolina State University, Raleigh, NC, United StatesDepartment of Crop Genetics, John Innes Centre, Norwich, United KingdomImportant advances have been made in understanding the relationship of necrotrophic effectors (NE) and host sensitivity (Snn) genes in the Parastagonospora nodorum-wheat pathosystem. Yet much remains to be learned about the role of these interactions in determining wheat resistance levels in the field, and there is mixed evidence on whether breeding programs have selected against Snn genes due to their role in conferring susceptibility. SNB occurs ubiquitously in the U.S. Atlantic seaboard, and the environment is especially well suited to field studies of resistance to natural P. nodorum populations, as there are no other important wheat leaf blights. Insights into the nature of SNB resistance have been gleaned from multi-year data on phenotypes and markers in cultivars representative of the region’s germplasm. In this perspective article, we review the evidence that in this eastern region of the U.S., wheat cultivars have durable quantitative SNB resistance and Snn–NE interactions are of limited importance. This conclusion is discussed in light of the relevant available information from other parts of the world.https://www.frontiersin.org/article/10.3389/fpls.2020.00155/fullParastagonospora nodorumSeptoria nodorum blotchquantitative resistancegenotyping by sequencinggenome-wide association studynecrotrophic effectors
collection DOAJ
language English
format Article
sources DOAJ
author Christina Cowger
Brian Ward
Gina Brown-Guedira
James K. M. Brown
spellingShingle Christina Cowger
Brian Ward
Gina Brown-Guedira
James K. M. Brown
Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat
Frontiers in Plant Science
Parastagonospora nodorum
Septoria nodorum blotch
quantitative resistance
genotyping by sequencing
genome-wide association study
necrotrophic effectors
author_facet Christina Cowger
Brian Ward
Gina Brown-Guedira
James K. M. Brown
author_sort Christina Cowger
title Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat
title_short Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat
title_full Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat
title_fullStr Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat
title_full_unstemmed Role of Effector-Sensitivity Gene Interactions and Durability of Quantitative Resistance to Septoria Nodorum Blotch in Eastern U.S. Wheat
title_sort role of effector-sensitivity gene interactions and durability of quantitative resistance to septoria nodorum blotch in eastern u.s. wheat
publisher Frontiers Media S.A.
series Frontiers in Plant Science
issn 1664-462X
publishDate 2020-03-01
description Important advances have been made in understanding the relationship of necrotrophic effectors (NE) and host sensitivity (Snn) genes in the Parastagonospora nodorum-wheat pathosystem. Yet much remains to be learned about the role of these interactions in determining wheat resistance levels in the field, and there is mixed evidence on whether breeding programs have selected against Snn genes due to their role in conferring susceptibility. SNB occurs ubiquitously in the U.S. Atlantic seaboard, and the environment is especially well suited to field studies of resistance to natural P. nodorum populations, as there are no other important wheat leaf blights. Insights into the nature of SNB resistance have been gleaned from multi-year data on phenotypes and markers in cultivars representative of the region’s germplasm. In this perspective article, we review the evidence that in this eastern region of the U.S., wheat cultivars have durable quantitative SNB resistance and Snn–NE interactions are of limited importance. This conclusion is discussed in light of the relevant available information from other parts of the world.
topic Parastagonospora nodorum
Septoria nodorum blotch
quantitative resistance
genotyping by sequencing
genome-wide association study
necrotrophic effectors
url https://www.frontiersin.org/article/10.3389/fpls.2020.00155/full
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