Abstract

LIGARRETO M., Gustavo A.. COMPONENTS OF VARIANCE IN GROWTH TRAITS AND PHOTOSYNTHESIS IN COMMON BEAN (Phaseolus vulgaris L.). rev.udcaactual.divulg.cient. [online]. 2013, vol.16, n.1, pp.87-96. ISSN 0123-4226.

Bean collections have been documented by morphological and production traits, but the knowledge related with growth and photosynthesis are deficient, allowing the application of this research to support breeding programs of high value cultivars for food security. In a common bean population of 29 accessions of the Colombian germplasm bank administrated by the "Corporación Colombiana de Investigación agropecuaria (Corpoica)" with origins in Argentina, Bolivia, Colombia, Mexico and Peru, 34 variables were measured with several quantitative characteristics related to plant growth and photosynthesis, in order to identify the variables with higher genetic improvement and lower environmental effects. The analysis of the 34 quantitative variables of physiologic nature revealed the high effect of the environment on their expression, except on the leaf area ratio (LAR), the leaf weight ratio (LWR) and the specific leaf area (SLA), which are more genetic expression, showing them as possible characters to be used at accessions description and as potential variables for the genotype selection in breeding programs.

Keywords : Growth and development; evaluation, germplasm; food legume.

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