Interpopulation Crosses, Inheritance Study, and Genetic Variability in the Brown Planthopper Complex, Nilaparvata lugens (Homoptera: Delphacidae) |
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Authors: | M A Latif Mohd Yosuh Omar Soon Guan Tan Siti Shapor Siraj Abdul Rahim Ismail |
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Institution: | 1. Plant Pathology Division, Bangladesh Rice Research Institute, Gazipur, 1701, Bangladesh 2. Department of Biology, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia 3. Department of Cell and Molecular Biology, Faculty of Biotechnology and Molecular Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia 4. Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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Abstract: | Studies on hybridization, inheritance, and population genetics of brown planthoppers that infest rice and weeds were undertaken using starch gel electrophoresis to determine whether the weed-infesting population represents a biological race or a species. F1 and F2 generations were produced by crosses between parental insects from the two populations with little indication of hybrid sterility. Gpi, Mdh, and Idh loci were inherited in a simple Mendelian fashion in families of two sympatric populations. Sixteen populations of Nilaparvata spp. from eight locations were collected. The Mdh, Idh, Pgm, Gpi, 6Pgd, and Acp loci were polymorphic. The N. lugens of rice with high esterase activity were clustered into a group and characterized by the presence of alleles Gpi 110 and Gpi 120 , whereas N. lugens from weeds with low esterase activity were clustered into another group and characterized by Gpi 100 and Gpi 90 . There was a lack of heterozygotes between the common alleles of the two populations. This means that the two groups of individuals belong to different gene pools. |
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