Influence of Three Soybean Plant Genotypes and Their F1 Intercrosses on the Development of Five Insect Species
Authors: Lambert, Lavone; Kilen, T. C.
Source: Journal of Economic Entomology, Volume 77, Number 3, June 1984 , pp. 622-625(4)
Publisher: Entomological Society of America
Abstract:A bioassay technique was used to evaluate soybean Glycine max (L.) Merr. plant introduction(s) (PI) 171451, 227687, 229358, F1 plants of their intercrosses, and soybean cv. Davis for relative levels of resistance to velvetbean caterpillar (VBC),Anticarsia gemmatalis Hübner, soybean looper (SBL), Pseudoplusia includens (Walker), corn earworm (CEW), Heliothis zea (Boddie), tobacco budworm (TBW), H. virescens (F.), and beet armyworm (BAW), Spodoptera exigua (Hübner). Larvae of all five insect species reared on leaves from PI 227687 and 229358 were significantly smaller than those reared on leaves from 'Davis.' VBC, SBL, and BAW larvae reared on leaves from PI 171451 were not significantly different from those reared on leaves from 'Davis.' Differences among larvae reared on leaves from PI 227687 and 229358 for VBC, SBL, and TBW were not significant. CEW and BAW larvae reared on leaves from PI 229358 were significantly larger than those reared on leaves from PI 227687. Although the same trends observed with larval weights were exhibited by pupal weights, plant genotype influenced pupal weights less than larval weights. Days to pupation were increased, although not always significantly, for larvae reared on the resistant genotypes. Mortality tended to be greater for larvae reared on leaves from resistant genotypes. Weights of larvae reared on leaves from the F1 plants of intercrosses between PI tended to be intermediate to those reared on leaves from the parents. However, CEW larvae reared on leaves from the F1 plants of the PI 171451 × PI 229358 cross were smaller than those reared on leaves from either parent. A strong trend for larvae reared on leaves from F1 plants of the crosses to be smaller than the midparent value was apparent. Also, the trend in days to pupation and pupal weights was very similar to the trend in larval weights. Because larval weight for those reared on leaves from F1 plants tended to be similar to those reared on the most resistant parents, a slight dominance effect for resistance is indicated. The response of insects to the crosses indicates that resistance levels can be increased through a program of intercrossing and selecting.
Document Type: Research Article
Publication date: June 1, 1984
- 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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