Molecular Breeding

, Volume 22, Issue 2, pp 201–215

Mapping QTL for climbing ability and component traits in common bean (Phaseolus vulgaris L.)

Article

DOI: 10.1007/s11032-008-9167-5

Cite this article as:
Checa, O.E. & Blair, M.W. Mol Breeding (2008) 22: 201. doi:10.1007/s11032-008-9167-5

Abstract

Common bean (Phaseolus vulgaris L.) varies in growth habit from aggressive climbing types to bush beans. Growth habit is determined by a combination of factors including determinate versus indeterminate growth, total plant height, degree of branching and internode length. Together these factors make up climbing ability. The objective of this research was to determine the quantitative trait loci (QTL) controlling climbing ability in a F5:8 recombinant inbred line population derived from an inter-gene pool cross of an aggressive indeterminate climbing bean with type IV growth habit (G2333) by an indeterminate bush bean of type IIb growth habit (G19839). The population was planted in four randomized complete block design experiments across environments that varied in altitude (from 1,000 to 1,750 masl) and soil fertility (low versus high phosphorus). QTL were identified for plant height, internode length and number of branches per plant on a genetic map covering all common bean linkage groups with a total length of 1,175 cM. In addition a scale was developed to evaluate overall climbing ability and was also used to identify QTL. A total of 7 QTL were found for plant height, 9 for climbing ability, 6 for internode length and 1 for branch number. The largest number and most significant QTL were found on the lower half of linkage group B04 suggesting a major pleiotropic locus for growth habit traits at this location of the genome that is distinct from previously characterized genes which control plant morphology of the crop.

Keywords

Growth habitInternode lengthPlant architecture and plant height

Abbreviations

BN

Branch number

CA

Climbing ability

DAP

Days after planting

IL

Internode length

LR

Likelihood ratio

PH

Plant height

QTL

Quantitative trait loci

RIL

Recombinant inbred line

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Faculty of Agricultural SciencesUniversidad de NariñoPastoColombia
  2. 2.Bean ProjectCentro Internacional de Agricultura Tropical (CIAT)CaliColombia