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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #255374
Title: Evaluation of Snap Bean Genotypes Combining Rust Resistance and Heat Tolerance Traits in East Africa

Author
item WASONGA, CHARLES - Cornell University
item Pastor Corrales, Marcial - Talo
item Porch, Timothy - Tim
item GRIFFITHS, PHILLIP - Cornell University

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: 3/15/2010
Publication Date: 3/31/2010
Citation: Wasonga, C.J., Pastor Corrales, M.A., Porch Clay, T.G., Griffiths, P. 2010. Evaluation of Snap Bean Genotypes Combining Rust Resistance and Heat Tolerance Traits in East Africa. Annual Report of the Bean Improvement Cooperative 53:62-63.

Interpretive Summary: The major biotic and abiotic constraints to snap bean production in East Africa include diseases such as common bean rust and high ambient temperatures that cause heat stress. Rust resistant snap beans that perform well under both cool and hot environmental conditions are needed to increase production in this region. The objective of the present study was to evaluate, at East African field sites, selected snap bean breeding lines with both rust resistance and heat tolerance and to identify lines for further genetic improvement. Concurrent selection resulted in the selection of three lines that showed yield stability under rust and high temperature stress.

Technical Abstract: The major biotic and abiotic constraints to snap bean production in East Africa include diseases such as common bean rust (caused by Uromyces appendiculatus) and high ambient temperatures that cause heat stress. Rust resistant snap beans that perform well under both cool and hot agro-ecological conditions are needed to increase production in this region. The objective of the present study was to evaluate, at East African field sites, selected snap bean breeding lines with rust resistance and heat tolerance combined in the same genetic background and to identify lines to be utilized in the genetic improvement of cultivars presently grown in East Africa. Concurrent selection resulted in the selection of three lines that showed yield stability under rust and high ambient temperature stress.