Genetics of Resistance in Maize to a Complex of Three Species of Thrips (Thysanoptera: Thripidae)

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Abstract:

During summer 1988, a heavy infestation of Thrips, Anaphothrips obscurus (Mueller), Frankliniella fusca (Hinds), and F. tenuicomis (Uzel) occurred on maize, Zea mays L., allowing for evaluation of resistance in 10 inbred maize lines. Thrips populations peaked at the end of June, and evaluations of the damage were taken at this time. Inbred 41:2504B had the smallest thrips population, B37 had the largest population, and Mo17, CIOS, and B73 were intermediate. A lO-inbred-line diallel cross, based on damage caused by leaf-feeding, showed that variations due to general combining ability (GCA)and specific combining ability (SCA) were highly significant. Variation due to GCA, however, was 14 times greater than that for SCA, indicating that additive genetic effects were more important than nonadditive effects. The inbred 41:2504B was the most resistant and best general combiner, whereas CI03 was the most susceptible to thrips damage.

Document Type: Research Article

Publication date: April 1, 1990

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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