Aspects of brown planthopper adaptation to resistant rice varieties with the Bph3 gene

Peñalver Cruz, A; Arida, A; Heong, KL; Horgan, FG

Aspects of brown planthopper adaptation to resistant rice varieties with the Bph3 gene

Peñalver Cruz, A Arida, A Heong, KL Horgan, FG

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Publication Type:: Journal Article
Citation:: Entomologia Experimentalis et Applicata, 2011, 141 (3), pp. 245 - 257
Issue Date:: 2011-12-01

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Field	Value	Language
dc.contributor.author	Peñalver Cruz, A	en_US
dc.contributor.author	Arida, A	en_US
dc.contributor.author	Heong, KL	en_US
dc.contributor.author	Horgan, FG https://orcid.org/0000-0003-3796-667X	en_US
dc.date.issued	2011-12-01	en_US
dc.identifier.citation	Entomologia Experimentalis et Applicata, 2011, 141 (3), pp. 245 - 257	en_US
dc.identifier.issn	0013-8703	en_US
dc.identifier.uri	http://hdl.handle.net/10453/115823
dc.description.abstract	Despite over 30years of deployment, varieties with the Bph3 gene for resistance to the brown planthopper (BPH), Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), are still effective in much of the Philippines. In the present study, we determined the effects of adaptation to one resistant variety, IR62 - assumed to possess the Bph3 gene - on (1) resistance against a series of varieties with similar biotypical responses (presumed to contain the same major resistance genes), and (2) a differential variety with the bph4 gene that occurs at the same chromosome position as Bph3. We also examined the effects of high soil nitrogen on the effectiveness of Bph3. Feeding, planthopper biomass, and development times were reduced in a wild BPH population when reared on IR62 compared with the susceptible standard variety TN1. However, nitrogen application increased the susceptibility of IR62. After 13 generations on IR62, BPH had adapted to the plant's resistance. Virulence of the adapted BPH against the variety 'Rathu Heenati' supports the idea that Bph3 is present in IR62. Across similar IR varieties (IR60, IR66, IR68, IR70, IR72, and IR74), feeding, planthopper biomass, and development rates were generally higher for IR62-adapted than for non-adapted BPH; however, contrary to expectations, many of these varieties were already susceptible to wild BPH. Fitness was also higher for IR62-adapted BPH on the variety 'Babawee' indicating a close relation between Bph3 and bph4. The results indicate that the conventional understanding of the genetics behind resistance in IR varieties needs to be readdressed to develop and improve deployment strategies for resistance management. © 2011 The Authors. Entomologia Experimentalis et Applicata © 2011 The Netherlands Entomological Society.	en_US
dc.relation.ispartof	Entomologia Experimentalis et Applicata	en_US
dc.relation.isbasedon	10.1111/j.1570-7458.2011.01193.x	en_US
dc.subject.classification	Entomology	en_US
dc.title	Aspects of brown planthopper adaptation to resistant rice varieties with the Bph3 gene	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	141	en_US
utslib.for	0501 Ecological Applications	en_US
utslib.for	0608 Zoology	en_US
utslib.for	0701 Agriculture, Land and Farm Management	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	141	en_US

Abstract:

Despite over 30years of deployment, varieties with the Bph3 gene for resistance to the brown planthopper (BPH), Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), are still effective in much of the Philippines. In the present study, we determined the effects of adaptation to one resistant variety, IR62 - assumed to possess the Bph3 gene - on (1) resistance against a series of varieties with similar biotypical responses (presumed to contain the same major resistance genes), and (2) a differential variety with the bph4 gene that occurs at the same chromosome position as Bph3. We also examined the effects of high soil nitrogen on the effectiveness of Bph3. Feeding, planthopper biomass, and development times were reduced in a wild BPH population when reared on IR62 compared with the susceptible standard variety TN1. However, nitrogen application increased the susceptibility of IR62. After 13 generations on IR62, BPH had adapted to the plant's resistance. Virulence of the adapted BPH against the variety 'Rathu Heenati' supports the idea that Bph3 is present in IR62. Across similar IR varieties (IR60, IR66, IR68, IR70, IR72, and IR74), feeding, planthopper biomass, and development rates were generally higher for IR62-adapted than for non-adapted BPH; however, contrary to expectations, many of these varieties were already susceptible to wild BPH. Fitness was also higher for IR62-adapted BPH on the variety 'Babawee' indicating a close relation between Bph3 and bph4. The results indicate that the conventional understanding of the genetics behind resistance in IR varieties needs to be readdressed to develop and improve deployment strategies for resistance management. © 2011 The Authors. Entomologia Experimentalis et Applicata © 2011 The Netherlands Entomological Society.

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http://hdl.handle.net/10453/115823