Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness

Thrips-transmitted tomato spotted wilt orthotospovirus (TSWV) is a major constraint to peanut production in the southeastern United States. Peanut cultivars with resistance to TSWV have been widely used for over twenty years. Intensive usage of resistant cultivars has raised concerns about possible...

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Autores principales:	Pin-Chu Lai, Mark R. Abney, Sudeep Bag, Albert K. Culbreath, Rajagopalbabu Srinivasan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	host plant resistance tolerance <i>Orthotospovirus</i> spotted wilt of peanut <i>Frankliniella fusca</i> vector fitness Medicine R
Acceso en línea:	https://doaj.org/article/f1661e56a7c54ddb9a497530618832f8
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spelling	oai:doaj.org-article:f1661e56a7c54ddb9a497530618832f82021-11-25T18:38:07ZImpact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness10.3390/pathogens101114182076-0817https://doaj.org/article/f1661e56a7c54ddb9a497530618832f82021-11-01T00:00:00Zhttps://www.mdpi.com/2076-0817/10/11/1418https://doaj.org/toc/2076-0817Thrips-transmitted tomato spotted wilt orthotospovirus (TSWV) is a major constraint to peanut production in the southeastern United States. Peanut cultivars with resistance to TSWV have been widely used for over twenty years. Intensive usage of resistant cultivars has raised concerns about possible selection pressure against TSWV and a likelihood of resistance breakdown. Population genetics of TSWV isolates collected from cultivars with varying levels of TSWV resistance was investigated using five TSWV genes. Phylogenetic trees of genes did not indicate host resistance-based clustering of TSWV isolates. Genetic variation in TSWV isolates and neutrality tests suggested recent population expansion. Mutation and purifying selection seem to be the major forces driving TSWV evolution. Positive selection was found in N and RdRp genes but was not influenced by TSWV resistance. Population differentiation occurred between isolates collected from 1998 and 2010 and from 2016 to 2019 but not between isolates from susceptible and resistant cultivars. Evaluated TSWV-resistant cultivars differed, albeit not substantially, in their susceptibility to thrips. Thrips oviposition was reduced, and development was delayed in some cultivars. Overall, no evidence was found to support exertion of selection pressure on TSWV by host resistance in peanut cultivars, and some cultivars differentially affected thrips fitness than others.Pin-Chu LaiMark R. AbneySudeep BagAlbert K. CulbreathRajagopalbabu SrinivasanMDPI AGarticlehost plant resistancetolerance<i>Orthotospovirus</i>spotted wilt of peanut<i>Frankliniella fusca</i>vector fitnessMedicineRENPathogens, Vol 10, Iss 1418, p 1418 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	host plant resistance tolerance <i>Orthotospovirus</i> spotted wilt of peanut <i>Frankliniella fusca</i> vector fitness Medicine R
spellingShingle	host plant resistance tolerance <i>Orthotospovirus</i> spotted wilt of peanut <i>Frankliniella fusca</i> vector fitness Medicine R Pin-Chu Lai Mark R. Abney Sudeep Bag Albert K. Culbreath Rajagopalbabu Srinivasan Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness
description	Thrips-transmitted tomato spotted wilt orthotospovirus (TSWV) is a major constraint to peanut production in the southeastern United States. Peanut cultivars with resistance to TSWV have been widely used for over twenty years. Intensive usage of resistant cultivars has raised concerns about possible selection pressure against TSWV and a likelihood of resistance breakdown. Population genetics of TSWV isolates collected from cultivars with varying levels of TSWV resistance was investigated using five TSWV genes. Phylogenetic trees of genes did not indicate host resistance-based clustering of TSWV isolates. Genetic variation in TSWV isolates and neutrality tests suggested recent population expansion. Mutation and purifying selection seem to be the major forces driving TSWV evolution. Positive selection was found in N and RdRp genes but was not influenced by TSWV resistance. Population differentiation occurred between isolates collected from 1998 and 2010 and from 2016 to 2019 but not between isolates from susceptible and resistant cultivars. Evaluated TSWV-resistant cultivars differed, albeit not substantially, in their susceptibility to thrips. Thrips oviposition was reduced, and development was delayed in some cultivars. Overall, no evidence was found to support exertion of selection pressure on TSWV by host resistance in peanut cultivars, and some cultivars differentially affected thrips fitness than others.
format	article
author	Pin-Chu Lai Mark R. Abney Sudeep Bag Albert K. Culbreath Rajagopalbabu Srinivasan
author_facet	Pin-Chu Lai Mark R. Abney Sudeep Bag Albert K. Culbreath Rajagopalbabu Srinivasan
author_sort	Pin-Chu Lai
title	Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness
title_short	Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness
title_full	Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness
title_fullStr	Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness
title_full_unstemmed	Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness
title_sort	impact of host resistance to tomato spotted wilt orthotospovirus in peanut cultivars on virus population genetics and thrips fitness
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f1661e56a7c54ddb9a497530618832f8
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Impact of Host Resistance to Tomato Spotted Wilt Orthotospovirus in Peanut Cultivars on Virus Population Genetics and Thrips Fitness

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