Stem rot disease evaluation of mass-selected peanut populations

Branch, W.D. and Brenneman, T.B. (1999) Stem rot disease evaluation of mass-selected peanut populations. Crop Protection, 18 (2). pp. 127-130.

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Stem rot is a widespread, devastating disease of the cultivated groundnut (Arachis hypogaea) caused by the soilborne pathogen Sclerotium rolfsii [Corticium rolfsii]. Resistant cultivars are needed to reduce cost of groundnut production. 'Toalson' and 'Southern Runner' are 2 genetically diverse cultivars with partial stem rot resistance; whereas, 'Florunner' and 'Sunbelt Runner' are two stem rot susceptible cultivars. Mass-selected populations derived from different combinations of crosses among these 2 resistant and 2 susceptible cultivars were evaluated. Four mass-selected populations, 2 unselected bulks, and 4 parental cultivars were evaluated in the F6-F9 generations for pod yield and stem rot resistance in replicated field tests during 1993-1996 at the agronomy research farm near the Georgia Coastal Plain Experiment Station, Tifton, Georgia, USA. The resistant cultivar Toalson produced 40% higher pod yields and had 50% fewer stem rot disease loci than the other partially resistant cultivar Southern Runner. Mass-selected populations derived from the Sunbelt Runner × Toalson cross combination also had significantly higher yield and better stem rot resistance than mass-selected populations derived from the Florunner × Southern Runner cross combination

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Arachis hypogaea L.; Sclerotium rolfsii Sacc.; Groundnut; Cross combination; Cultivars; Disease resistance
Author Affiliation: Department of Crop and Soil Sciences, University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793-0748, USA
Subjects: Plant Protection
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 03 Apr 2013 08:56
Last Modified: 03 Apr 2013 08:56
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