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Morphology, phenology and agronomic traits of two wild Mexican common bean (Phaseolus vulgaris L.) populations under cultivation
J Rogelio Aguirre R, CB Peña-Valdivia, JS Bayuelo-Jiménez
Abstract
The objective of this research was to characterise two populations of wild bean grown
simultaneously in an experimental field site in Chapingo, Mexico. For comparative purposes, two cultivars of common bean were included. Only seven of 24 phenological and morphological traits (e.g. number of days to emergence, expansion of primary leaves and third trifoliolate leaf, number of branches per
plant, diameter of stem, number of flower buds per plant and nodes per branch)
investigated were statistically similar between and within wild samples due
largely to differences in growth habit. The number of inflorescences, leaves,
pods and seeds per wild plant fluctuated between 72 and 145, 109 and 206, 68
and 284 and 180 and 513, respectively. In contrast, each cultivar was highly
homogeneous. Principal component analyses supported the conclusion that these
morphological and agronomic characteristics of wild common bean populations
primarily depend on the predominant growth habit type and that under different
environments, the expression of these traits may change.
South African Journal
of Botany 2003, 69:
410–421
simultaneously in an experimental field site in Chapingo, Mexico. For comparative purposes, two cultivars of common bean were included. Only seven of 24 phenological and morphological traits (e.g. number of days to emergence, expansion of primary leaves and third trifoliolate leaf, number of branches per
plant, diameter of stem, number of flower buds per plant and nodes per branch)
investigated were statistically similar between and within wild samples due
largely to differences in growth habit. The number of inflorescences, leaves,
pods and seeds per wild plant fluctuated between 72 and 145, 109 and 206, 68
and 284 and 180 and 513, respectively. In contrast, each cultivar was highly
homogeneous. Principal component analyses supported the conclusion that these
morphological and agronomic characteristics of wild common bean populations
primarily depend on the predominant growth habit type and that under different
environments, the expression of these traits may change.
South African Journal
of Botany 2003, 69:
410–421
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South African Journal of Botany. ISSN: 0254-6299