Demographic parameters of long-term laboratory strains of the brown planthopper, nilaparvata lugens stål, (Homoptera: Delphacidae) on resistance genes, bph20(t) and Bph21(t) in Rice

Khin Khin Marlar Myint, Masaya Matsumura, Masami Takagi, Hideshi Yasui

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14 Citations (Scopus)

Abstract

The demographic parameters of four laboratory strains of the brown planthopper (BPH), Nilaparvata lugens (Stål) collected in Japan between 1966 and 2005, were evaluated using near-isogenic lines (NILs) and pyramided line (PYL) of rice carrying recently identified genes, bph20(t) and Bphz21(t) conferring resistance to BPH. Six traits: adult survivorship, development of female abdomen, nymph survivorship, nymphal developmental period, adult body weight, and oviposition were examined. Based on the adult survivorship and development of female abdomen, the BPH strains of Hatano-66 and Chikugo-89 were avirulent to bph20(t)-NIL and Bph21 (t)-NIL as well as their PYL carrying both bph20(t) and Bph21 (t). On the other hand, the BPH strains of Isahaya-99 and Nishigoshi-05 were virulent to bph20(t)-NIL and Bph21 (t)-NIL but still avirulent to their PYL. Four other demographic parameters of the avirulent strains of BPH showed low nymph survivorship, prolonged nymphal developmental period, light body weight of adults and small number of eggs laid on the resistant lines to BPH. These results suggest that a resistance mechanism such as feeding inhibition caused by the two major genes resistance to BPH, similarly affect both on nymphal and adult stages. The PYL with both bph20(t) and Bph21 (t) had an epistatic effect of resistance to the BPH strains migrated into Japan since 1999.

Original languageEnglish
Pages (from-to)159-164
Number of pages6
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume54
Issue number1
Publication statusPublished - Feb 2009

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Delphacidae
Nilaparvata lugens
Hemiptera
Homoptera
demographic statistics
Survival Rate
Demography
rice
Nymph
isogenic lines
Abdomen
Genes
Japan
genes
Body Weight
survival rate
Oviposition
Eggs
abdomen
nymphs

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Biotechnology

Cite this

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title = "Demographic parameters of long-term laboratory strains of the brown planthopper, nilaparvata lugens st{\aa}l, (Homoptera: Delphacidae) on resistance genes, bph20(t) and Bph21(t) in Rice",
abstract = "The demographic parameters of four laboratory strains of the brown planthopper (BPH), Nilaparvata lugens (St{\aa}l) collected in Japan between 1966 and 2005, were evaluated using near-isogenic lines (NILs) and pyramided line (PYL) of rice carrying recently identified genes, bph20(t) and Bphz21(t) conferring resistance to BPH. Six traits: adult survivorship, development of female abdomen, nymph survivorship, nymphal developmental period, adult body weight, and oviposition were examined. Based on the adult survivorship and development of female abdomen, the BPH strains of Hatano-66 and Chikugo-89 were avirulent to bph20(t)-NIL and Bph21 (t)-NIL as well as their PYL carrying both bph20(t) and Bph21 (t). On the other hand, the BPH strains of Isahaya-99 and Nishigoshi-05 were virulent to bph20(t)-NIL and Bph21 (t)-NIL but still avirulent to their PYL. Four other demographic parameters of the avirulent strains of BPH showed low nymph survivorship, prolonged nymphal developmental period, light body weight of adults and small number of eggs laid on the resistant lines to BPH. These results suggest that a resistance mechanism such as feeding inhibition caused by the two major genes resistance to BPH, similarly affect both on nymphal and adult stages. The PYL with both bph20(t) and Bph21 (t) had an epistatic effect of resistance to the BPH strains migrated into Japan since 1999.",
author = "Myint, {Khin Khin Marlar} and Masaya Matsumura and Masami Takagi and Hideshi Yasui",
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T1 - Demographic parameters of long-term laboratory strains of the brown planthopper, nilaparvata lugens stål, (Homoptera

T2 - Delphacidae) on resistance genes, bph20(t) and Bph21(t) in Rice

AU - Myint, Khin Khin Marlar

AU - Matsumura, Masaya

AU - Takagi, Masami

AU - Yasui, Hideshi

PY - 2009/2

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N2 - The demographic parameters of four laboratory strains of the brown planthopper (BPH), Nilaparvata lugens (Stål) collected in Japan between 1966 and 2005, were evaluated using near-isogenic lines (NILs) and pyramided line (PYL) of rice carrying recently identified genes, bph20(t) and Bphz21(t) conferring resistance to BPH. Six traits: adult survivorship, development of female abdomen, nymph survivorship, nymphal developmental period, adult body weight, and oviposition were examined. Based on the adult survivorship and development of female abdomen, the BPH strains of Hatano-66 and Chikugo-89 were avirulent to bph20(t)-NIL and Bph21 (t)-NIL as well as their PYL carrying both bph20(t) and Bph21 (t). On the other hand, the BPH strains of Isahaya-99 and Nishigoshi-05 were virulent to bph20(t)-NIL and Bph21 (t)-NIL but still avirulent to their PYL. Four other demographic parameters of the avirulent strains of BPH showed low nymph survivorship, prolonged nymphal developmental period, light body weight of adults and small number of eggs laid on the resistant lines to BPH. These results suggest that a resistance mechanism such as feeding inhibition caused by the two major genes resistance to BPH, similarly affect both on nymphal and adult stages. The PYL with both bph20(t) and Bph21 (t) had an epistatic effect of resistance to the BPH strains migrated into Japan since 1999.

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