Yield potential of common bean cultivars in function of phosphorus stress in State of Tocantins

This work was developed in order to evaluate the yield potential of 11 common bean cultivars submitted tophosphorus stress. The research was carried in the experimental area of “Universidade Federal do Tocantins –Campus Universitário de Gurupi”. The experimental design was complete randomized blocks with four replications.To represent a stressing environment 20 kg ha-1 of P2O5 was applied at seeding time. The evaluated characteristicswere: plant height, height of first pod insertion, stem diameter, number of pods, number of gains per pod, onehundred gains mass, index of chlorophyll a, b, total and grain yield. It was concluded that the genotypes IPREldoradoand IPR-Colibri presented the better yield potential under phosphorus stress condition. Even underphosphorus stress, most cultivars presented plant height and height of first pod adequate to mechanized croppingsystems.