Developing greenbug resistant lines from the KP2BR sorghum breeding population

Starks, K.J. and Eberhart, S.A. and Casady, A.J. and Webster, O.J. (1976) Developing greenbug resistant lines from the KP2BR sorghum breeding population. Crop Science, 16 (3). pp. 360-362.

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Tests were designed to determine the possibilities of obtaining resistant lines from breeding populations as an alternative for insecticides for the control of the greenbug, Schizaphis grominum (Rondani). The KP2BR Sorghum bicolor (L.) Moench breeding population, developed from diverse germplasm, was random mated before selecting for resistance to the greenbug among seedlings in the greenhouse. To produce 135 S5 lines, selection was done in each of five generations (half-sib or S0, S1, S2, S3, and S4). For comparison, six F5 lines derived from individual resistant ✕ susceptible crosses were selected in three generations (F2, F3, and F4). The S5 lines from KP2BR had as high greenbug resistance as the better parental sources, but none of the F5 lines were as resistant. Withinplot variance for some S5 lines exceeded the estimate of within plot environmental variance, which suggested residual genetic variation. Breeding populations offer an alternative to the widely used practice of introducing insect (or other pest) resistance into new parental lines by backcrossing

Item Type: Article
Uncontrolled Keywords: Plant resistance, Plant breeding, Random-mating population, Sorghum bicolor, Schizaphis graminum.
Author Affiliation: Oklahoma State University(USA)
Subjects: Plant Protection
Crop Improvement
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Mr B Krishnamurthy
Date Deposited: 05 Jan 2012 05:27
Last Modified: 05 Jan 2012 05:27
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