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Journal of Heredity Advance Access published online on September 18, 2006
Journal of Heredity, doi:10.1093/jhered/esl025
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© The American Genetic Association. 2006. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.
Received February 1, 2006
Accepted July 6, 2006

Article

Generation Means Analysis of Climbing Ability in Common Bean (Phaseolus vulgaris L.)

Oscar Checa 1, Hernán Ceballos 2, and Matthew W. Blair 3 *

1 From the Faculty of Agricultural Sciences, Universidad de Nariño, Ciudad Universitaria Torobajo, Pasto, Colombia
2 From the Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia; From the Universidad Nacional de Colombia, Palmira Campus, Carrera 32 Chapinero, Via Candlemas, Palmira, the Valley of the Cauca, Colombia
3 From the Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia

* To whom correspondence should be addressed.
Matthew W. Blair, E-mail: m.blair{at}cgiar.org


  Abstract

Climbing common bean (Phaseolus vulgaris L.) genotypes have among the highest yield potential of all accessions found in the species. Genetic improvement of climbing beans would benefit from an understanding of the inheritance of climbing capacity (made up of plant height [PH] and internode length [IL] traits). The objective of this study was to determine the inheritance of climbing capacity traits in 3 crosses made within and between gene pools (Andean x Andean [BRB32 x MAC47], Mesoamerican x Mesoamerican [Tío Canela x G2333], and Mesoamerican x Andean [G2333 x G19839]) using generation means analysis. For each population, we used 6 generations (P1, P2, F1, F2, BC1P1, and BC1P2) that were evaluated at 2 growth stages (40 and 70 days after planting). Results showed the importance of additive compared with the dominant-additive portion of the genetic model. Broad-sense heritabilities for the traits varied from 62.3% to 85.6% for PH and from 66.5% to 83.7% for IL. The generation means analysis and estimates of heritability suggested that the inheritance of PH and IL in climbing beans is relatively simple.


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