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United States Department of Agriculture

Agricultural Research Service

Research Project: CHARACTERIZATION, CONVERSION, AND IMPROVEMENT OF COMMON BEAN GERMPLASM

Location: Tropical Crops and Germplasm Research

Title: Evaluation of Snap Bean Genotypes Combining Rust Resistance and Heat Tolerance Traits in East Africa

Authors
item Wasonga, Charles -
item Pastor Corrales, Marcial
item Porch, Timothy
item Griffiths, Phillip -

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: March 15, 2010
Publication Date: March 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.

Last Modified: 4/18/2014
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