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United States Department of Agriculture (USDA) 2004

EVALUATION OF FACTORS RELATED TO DROUGHT TOLERANCE IN COMMON BEAN (PHASEOLUS VULGARIS L.)

Drought Common Bean

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)

Titre : EVALUATION OF FACTORS RELATED TO DROUGHT TOLERANCE IN COMMON BEAN (PHASEOLUS VULGARIS L.)

Identification : PR00TSTAR-100

Pays : Etats Unis

Durée : Sep 15, 2004 à Sep 14, 2007

Domaine : Conservation and Efficient Use of Water ; Plant Genome, Genetics, and Genetic Mechanisms ; Water resources ; Beans (dry)

Partenaire : UNIVERSITY OF PUERTO RICO AT MAYAGUEZ P. O. BOX 9000 MAYAGUEZ,PR 00681

Objectifs  : The objective of this research effort is to estimate evapotranspiration crop factors and to characterize the physiology of growth, yield, and response to drought stress in bean (Phaseolus vulgaris L.) for a drought tolerant and a drought susceptible genotype.

Descriptif
Evapotranspiration crop coefficients and resistance factors (Kc, Kbc, Ke rs, and ra) will be estimated at the Juana Diaz Experiment Station for the drought-stressed and well-watered treatments. The crop stress factor (Ks) will also be determined. The semiarid climate makes the site ideal for drought tolerance studies. Measured rainfall, surface runoff, deep percolation and changes in soil moisture storage will be used in a water balance approach to estimate evapotranspiration. Runoff and deep percolation will be obtained from non-weighing lysymeters. Bulk surface resistance will be estimated from measurements of stomatal resistance and leaf area index. The aerodynamic resistance factor will be estimating using the Penman-Monteith equation along with the lysimeter-estimated evapotranspiration and the estimated of bulk surface resistance. Air temperature, humidity, wind speed, net radiation, soil heat flux, soil moisture and soil temperature will be obtained from an onsite weather station. Traits associated with drought tolerance will be identified with drought-stressed and well-watered treatments. These traits will then be used to study the genetics of drought tolerance in a segregating population generated from the same two genotypes. The coefficients generated from crossing the two genotypes representing different plant habits and response to drought stress will be valuable to breeders, agronomists, agricultural economists and engineers.

Présentation : USDA

Page publiée le 22 septembre 2015, mise à jour le 1er novembre 2017