Abstract

GARCIA-NARVAEZ, A. L.; HERNANDEZ-DELGADO, S.; CHAVEZ-SERVIA, J. L.  and  MAYEK-PEREZ, N. Morphological and agronomic variability of bean germplasm cultivated in Oaxaca, México. Revista bio ciencias [online]. 2020, vol.7, e876.  Epub Apr 28, 2021. ISSN 2007-3380.  https://doi.org/10.15741/revbio.07.e876.

In México, farmers do bean (Phaseolus spp.) seed mixes at sowing as a cushion strategy against climatic variation (rainfall patterns) during the crop cycle, mainly rainfall patterns. This practice is poorly documented on their effects on bean genetic population structure. The objective of this work was to characterize the morphological variability of 75 bean accessions cropped through six regions of Oaxaca: Mixteca, Sierra Norte, Sierra Sur, Istmo, Valles Centrales and Cañada. The hypothesis was that there is significant morphologic and agronomic variability in Oaxaca’s bean germplasm which is related to geographical origin. Germplasm was grown in pots under greenhouse conditions at Reynosa, Tamaulipas, and was randomized under a randomized completely experimental design with three replications. The morphologic and agronomic variability were broad and the most explicative traits were leaf area; 100-seeds weight; days to pod formation, filling and maturation. Despite no relationship between geographical origin and clustering based on morphological traits were found, germplasm was grouped according to ethnic origin. The identified groups were Mixteca-Istmo, Sierra NorteMixteca and Cañada-Sierra Sur-Valles Centrales.

Keywords : Phaseolus vulgaris L.; morphological traits; genetic resources.

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