Biochemical Genetics

, Volume 29, Issue 3–4, pp 115–123 | Cite as

Allozyme variation among biotypes of the brown planthopperNilaparvata lugens in the Philippines

  • Ramesh C. Saxena
  • Cesar G. Demayo
  • Adelina A. Barrion
Article

Abstract

Allozyme variation was studied in threeNilaparvata lugens biotypes infesting specific rice varieties and a biotype infesting a weed grass,Leersia hexandra. Of the 20 enzymes inN. lugens for which activity was noted, 9 were polymorphic. Eleven enzyme loci were monomorphic for the same allele in all biotype populations; the rest were polymorphic for two or more alleles. The mean number of alleles per polymorphic locus was 2.3, while the mean number of alleles per locus was 1.5; heterozygosity ranged from 0.02 to 0.06 (biotype 1 > biotype 3 >Leersia-infesting biotype > biotype 2). Allelic frequency differences were observed in five loci among the four biotypes. However, the coefficient of genetic identity (I) of 0.99+ showed that the four biotype populations were genetically close relatives or merely populations ofN. lugens undergoing genetic differentiation.

Key words

Nilaparvata lugens allozyme variation biotypes brown planthopper 

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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Ramesh C. Saxena
    • 1
  • Cesar G. Demayo
    • 1
  • Adelina A. Barrion
    • 2
  1. 1.Division of EntomologyInternational Rice Research Institute (IRRI)ManilaPhilippines
  2. 2.Genetics LaboratoryUniversity of the Philippines, Los Baños, CollegeLagunaPhilippines

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