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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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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