Response to selection in sorghum for resistance to head bug (Eurystylus oldi Poppius)

Showemimo, F.A. and Alabi, S.O. and Olorunju, P.E. and Ajayi, O. (2006) Response to selection in sorghum for resistance to head bug (Eurystylus oldi Poppius). Asian Journal of Plant Sciences, 5 (4). pp. 586-589.

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Field experiments were conducted in Nigeria, from 1995 to 1998, to study the application of early generation selection based on pedigree selection procedures on F2 populations of Sorghum bicolor to select and improve the level of resistance to sorghum head bug (Eurystylus oldi). The base population (F2), F2:3, F2:4 and 6 controls (3 resistant and 3 susceptible sorghum cultivars) were evaluated for 4 resistance traits. Reduction of 178 and 407 head bugs/5 panicles for the F2:3 and F2:4 generations, respectively, was obtained, which corresponded to 39.65 and 17.75% of percentage gain per generation of selection. The grain damage rating was also reduced considerably. Percentage gain per generation of 57.00 and 59.76 for F2:3 and F2:4, respectively, for grain yield was obtained. Significant but negative phenotypic and genotypic correlations were obtained except for 1000-grain weight. A similar trend was observed for correlated response. High percent genetic gain was recorded for all the traits at both generations of selection

Item Type: Article
Author Affiliation: Department of Plant Science, IAR/ABU, Samaru Zaria, Nigeria
Subjects: Plant Protection > Pests
Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Mr T L Gautham
Date Deposited: 10 Jan 2011 21:27
Last Modified: 10 Jan 2011 21:27
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