Genetic variability of the bollworm, Helicoverpa armigera, occurring on different host plants

Subramanian, S and Mohankumar, S (2006) Genetic variability of the bollworm, Helicoverpa armigera, occurring on different host plants. Journal of Insect Science, 6 (26). pp. 1-8.

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The bollworm, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is a polyphagous pest of worldwide occurrence inflicting annual crop damage in India worth US $1 billion. In India this insect occurs as a major pest in many economically important crops, including cotton, pigeonpea, chickpea, tomato, okra, and blackgram. Understanding the genetic variation among the H. armigera populations occurring on host plants has become essential to understand the variation in their susceptibility to different insecticides, including Bacillus thuringiensis. This preliminary study uses 10 microsatellite simple sequence repeat (SSR) markers, to provide insight into the genetic variability of H. armigera populations from six different host plants. Nine of the SSR primers indicated high variability across the different host associated populations with polymorphism ranging from 75 to 100 per cent. Using the un-weighted pair-group method analysis, H. armigera collected and reared from cotton stood out as unique in one cluster while the insects collected and reared on all other hosts grouped separately.

Item Type: Article
Uncontrolled Keywords: insect diversity, Simple Sequence Repeat markers, tomato, chili, cotton, chickpea, blackgram, redgram
Author Affiliation: Department of Plant Molecular Biology and Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore – 641 003, India
Subjects: Plant Protection
Divisions: Chickpea
Other Crops
Depositing User: Mr Siva Shankar
Date Deposited: 16 Apr 2012 05:13
Last Modified: 16 Apr 2012 05:13

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