Campus Units

Agronomy, Statistics

Document Type

Article

Publication Version

Published Version

Publication Date

8-1989

Journal or Book Title

Journal of Economic Entomology

Volume

82

Issue

4

First Page

1207

Last Page

1211

DOI

10.1093/jee/82.4.1207

Abstract

Diallel crossesamong five resistant (Tzi4, Narin 0330, Hi34, Hi29, Ant.C5) and four susceptible (Hi32, Tx601, B73, Oh43) maize, Zea mays L., inbreds were used to determine the genetic control of resistance to damage by second-generation European corn borer, Ostrinia nubilalis Hübner. The nine parents and their 36 crosseseach received 10 applications of 50 larvae (500 larvae per plant). Six replications of five plants per plot were infested at anthesis. Visual ratings were taken of sheath and collar tissue 50 to 60 d after infestation based on a nine-point rating scale (1, no damage to 9, severe damage). Significant differences for resistance were observed among the nine parents and the 36 crosses.Ratings of individual crosses varied significantly and averaged 3.7 with range of 1.8 (Tzi4 × Narin0330) to 5.3 (B73 × Oh43). Heterotic effects for resistance of the 36 crossesaveraged -19.5%, which was equivalent to a difference of 1.78 on the rating scale. General (GCA) and specificcombining ability (SCA)mean squares were significant with GCA accounting for 82 and SCAfor 18% of the total variation among crosses.Among the nine parents, four (Tzi4, Narino330, Hi34, Ant.C5) showed greater GCA effects for resistance.

Comments

This article is published as Kim, Soon-Kwon, A. R. Hallauer, W. D. Guthrie, D. Barry, K. R. Lamkey, and C. S. Hong. "Genetic resistance of tropical corn inbreds to second-generation European corn borer (Lepidoptera: Pyralidae)." Journal of economic entomology 82, no. 4 (1989): 1207-1211. doi: 10.1093/jee/82.4.1207. Posted with permission.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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