Long-term virulence monitoring of differential cultivars in Japan's immigrant populations of Nilaparvata lugens (Hemiptera: Delphacidae) in 2001–2019

Fujii, Tomohisa; Yoshida, Kazuhiro; Kobayashi, Tetsuya; Myint, Khin Khin Marlar; Yasui, Hirofumi; Sanada‐Morimura, Sachiyo; Matsumura, Masaya

doi:10.1007/s13355-021-00749-3

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…Some avirulent N. lugens cannot survive for 5 days, and thus the survival rate of avirulent N. lugens females was decreased during the present test period (Tanaka, 2000). We used a calculation method described by Tanaka (2000) and Fujii et al (2021) to determine the survival rate (SR) of females observed at 5 days after their release and the ratio of females with abdomen swelling (RAS) per replication in each rice cultivar. The averages of the values of SR and RAS were used together to estimate the virulence to each rice cultivar.…”

Section: Virulence Test Protocolmentioning

confidence: 99%

“…The uniform planting of resistant rice cultivars in many paddy fields exerted intense directional pressure on N. lugens , and the development of virulence to resistant rice cultivars occurred in East and southeast Asia within 2 years after the release of IR26 (Sogawa, 1992; Horgan, 2012). However, field N. lugens populations have not overcome the host‐plant resistance of rice cultivars that possess multiple BPH resistance gene loci, i.e., ADR52 ( BPH25 , BPH26 ), Balamawee [ BPH27 , with three quantitative trait loci (QTLs)], PTB33 ( BPH2 , BPH32 , BPH17 ‐ ptb ), and Rathu Heenati ( BPH3 , BPH17 ) (Horgan et al., 2015, 2017; Fujii et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

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Insecticide resistance triggers a reduction of virulence to host‐plant defenses in the brown planthopper

Fujii,

Matsukura,

Van Chien

et al. 2024

Entomologia Exp Applicata

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Plants produce various phytochemicals against herbivory, but phytophagous insects have encountered phytochemicals in the co‐evolutionary history between plants and insects. Selection pressure exerted by phytochemicals triggers a preadaptation to insecticide resistance in insect pests that is due to detoxification systems that are common to phytochemicals and insecticides in the insect's body. We investigated the interaction between the host plant resistance of rice cultivars and the brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae). Forty brown planthopper resistance gene loci (BPHs) that are related to phytochemicals in various cultivars of rice inhibit feeding by N. lugens, but this planthopper has developed virulence to resistant rice cultivars possessing some genes. Nilaparvata lugens has also developed resistance to some insecticides as a rapid adaptation to human‐driven selection. We tested the hypothesis that the evolution of insects' resistance to an insecticide is promoted by their encounters with phytochemicals. We compared the virulence of imidacloprid‐resistant and control N. lugens strains toward seven rice cultivars that possess different genes, and we observed that the imidacloprid‐resistant N. lugens had reduced virulence to three rice cultivars, Rathu Heenati (BPH3, BPH17), Babawee (BPH4), and Balamawee (BPH27, three quantitative trait loci), meaning that the development of imidacloprid resistance has a negative impact on the virulence of N. lugens to three cultivars. Our results indicate trade‐offs rather than a co‐relationship between the evolution of insecticide resistance and encounters with host plant defense.

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Section: Virulence Test Protocolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insecticide resistance triggers a reduction of virulence to host‐plant defenses in the brown planthopper

Fujii,

Matsukura,

Van Chien

et al. 2024

Entomologia Exp Applicata

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“…21 Furthermore, through the long-term monitoring of the N. lugens population in Japan, N. lugens have not adapted cultivars with multiple BPH resistant genes. 22 Since plants are sessile organisms, plants suffer not only biotic stresses but environmental factors (i.e., drought, heat, cold, and flooding). In particular, warming temperatures affect virus and insect resistance traits in plants.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, pyramiding three BPH genes ( BPH14 , BPH15 , and BPH18 ) into elite lines has an additive effect compared with pyramiding a single BPH resistance gene 21 . Furthermore, through the long‐term monitoring of the N. lugens population in Japan, N. lugens have not adapted cultivars with multiple BPH resistant genes 22 …”

Section: Introductionmentioning

confidence: 99%

Pyramiding BPH genes in rice maintains resistance against the brown planthopper under climate change

Wang,

Luo,

et al. 2023

Pest Management Science

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BACKGROUNDNilaparvata lugens (brown planthopper; BPH) is a significant rice pest in Asia, causing substantial yield losses. Pyramiding BPH resistance genes with diverse resistance traits into rice cultivars is an effective strategy for pest management. However, the response of pyramiding combinations to environmental changes remains unclear. To address this knowledge gap, we investigated three pyramiding rice lines (BPH2 + 32, BPH9 + 32, and BPH18 + 32) in the context of varying climate change conditions, ensuring sufficient N. lugens–rice interactions. Thus, we set three environmental conditions [30/25 °C (day/night) with 500 ppm CO2 concentration, 32/27 °C (day/night) with 600 ppm CO2 concentration, and 35/30 °C (day/night) with 1000 ppm CO2 concentration].RESULTSAll three pyramiding rice lines maintained the insect resistant ability under the three environmental settings. In particular, the BPH18 + 32 rice line exhibited stronger antibiotic and antixenosis effects against N. lugens. In addition, BPH18 + 32 rice line had better shoot resilience under N. lugens infestation, whereas the performance of the other two selected pyramiding rice lines varied. Thus, although BPH2, BPH9, and BPH18 represent three alleles at the same locus, their resistance levels against N. lugens may vary under distinct climate change scenarios, as evidenced by the performance of N. lugens on the three pyramiding rice lines.CONCLUSIONOur findings indicate that all three tested pyramiding rice lines maintained their insect resistance in the face of diverse climate change scenarios. However, these lines exhibited varied repellent responses and resilience capacities in response to climate change. Thus, the combination of pyramiding genes needs to be considered for future breeding programs. © 2023 Society of Chemical Industry.

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Slowing virulence adaptation in Asian rice planthoppers through migration-based deployment of resistance genes

Horgan

2023

Current Opinion in Insect Science

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Long-term virulence monitoring of differential cultivars in Japan's immigrant populations of Nilaparvata lugens (Hemiptera: Delphacidae) in 2001–2019

Cited by 7 publications

References 29 publications

Insecticide resistance triggers a reduction of virulence to host‐plant defenses in the brown planthopper

Insecticide resistance triggers a reduction of virulence to host‐plant defenses in the brown planthopper

Pyramiding BPH genes in rice maintains resistance against the brown planthopper under climate change

Slowing virulence adaptation in Asian rice planthoppers through migration-based deployment of resistance genes

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