Abstract
Based on new information on floral structures, seedling, fruit, seed, root, and leaflet characters, Phaseolus dasycarpus is re-described and illustrated. Its chromosome number was determined as 2n = 22, with metacentric and submetacentric chromosomes, and karyotype formula of 9m + 2sm. Previous phylogenetic analyses of ITS and trnK sequence data, and those obtained in the present study, show P. dasycarpus to be aligned within section Pedicellati.
Resumen
Con nueva información de estructuras florales, plántulas, frutos, semillas, raíz y folíolos, se redescribe e ilustra a Phaseolus dasycarpus. Se determina el número cromosómico 2n = 22, con cromosomas metacéntricos y submetacéntricos y fórmula cariotípica = 9m + 2sm. Análisis filogenéticos previos con secuencias de ITS y trnK y los resultados obtenidos en el presente estudio, establecen a P. dasycarpus en la sección Pedicellati.
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Acknowledgments
We thank María del Rosario García Peña for her help in obtaining the loans of specimens used in writing this paper; the curator of XAL, for granting those loans; Albino Luna for drawing the beautiful illustration; Norma Oropeza, Alberto Reyes, Gabriel Flores and Fernando Tapia for their assistance in the field; Virginia León Règagnon and Laura Márquez Valdelamar for their support and the use of facilities in the molecular studies; Berenit Mendoza for preparing the SEM photo of the pollen, and Alfredo Wong for providing computer support. The Dirección General de Apoyo al Personal Académico (DGAPA-UNAM) awarded a graduate studies scholarship to the first author.
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Mercado-Ruaro, P., Delgado-Salinas, A. & Chiang, F. Taxonomic re-assessment of Phaseolus dasycarpus (Leguminosae): Systematic position, chromosome studies and re-description. Brittonia 61, 8–13 (2009). https://doi.org/10.1007/s12228-008-9048-6
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DOI: https://doi.org/10.1007/s12228-008-9048-6