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United States Department of Agriculture

Agricultural Research Service

Research Project: CHARACTERIZATION, CONVERSION, AND IMPROVEMENT OF COMMON BEAN GERMPLASM Title: Root Traits and Nodulation of Recombinant Inbred Bean Lines from a ‘jamapa × Calima’ Population Inoculated with Two Strains of Rhizobium

Authors
item Guachambala, Marcelino -
item Gonzalez, Abeyezer -
item Estevez DE Jensen, Consuelo -
item Beaver, James -
item Porch, Timothy

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: March 2, 2013
Publication Date: March 15, 2013
Citation: Guachambala, M., Gonzalez, A., Estevez De Jensen, C., Beaver, J.S., Porch Clay, T.G. 2013. Root traits and nodulation of recombinant inbred bean lines from a Jamapa x Calima population inoculated with two strains of rhizobium. Bean Improvement Cooperative Annual Report. 56:75-76.

Interpretive Summary: Bean cultivars from South American and Central American origin often have contrasting above-ground traits. Less is known, however, of possible differences in root traits of beans from these two gene pools. Recombinant inbred lines (RIL) derived from a cross between a South American and a Central American cultivar were evaluated in a laboratory trial for root traits and nodulation. They were cultivated using a hydroponic method with Nitrogen free nutrient solution and evaluated in root growth pouches. Significant differences in nodulation were found and correlations between traits and heritability of the traits were evaluated. These traits will be useful for increasing bean production under conditions with little or no fertilization.

Technical Abstract: Bean cultivars of Andean and Middle American origin often have contrasting above-ground traits. Less is known, however, of possible differences in root traits of beans from different gene pools. Recombinant inbred lines (RIL) derived from a cross between the Andean cultivar ‘Calima’ and the Middle American cultivar ‘Jamapa’ were evaluated in a laboratory trial for root traits and nodulation. The RILs, Jamapa and Calima were cultivated using a hydroponic method with Nitrogen free nutrient solution and evaluated in root growth pouches. Significant differences in nodulation were found and phenotypic correlations and narrow sense heritabilities were calculated for root and nodulation traits.

Last Modified: 12/28/2014
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