Water deficit tolerance in genotypes of Urochloa spp.

Water deficit in Urochloa spp.


  • EDUARDO MOREIRA BARRADAS DE SOUZA Universidade Federal de Minas Gerais
  • Wadson Sebastião Duarte da Rocha Embrapa Gado de Leite
  • Natalia de Avila Soares Universidade Federal de Minas Gerais
  • Carlos Eugênio Martins Embrapa Gado de Leite
  • Fausto de Souza Sobrinho Embrapa Gado de Leite
  • Maria Izabel Vieira de Almeida Universidade Federal do Espírito Santo
  • Patricia do Rosario Rodrigues Universidade Federal de Minas Gerais
  • Gisele Rodrigues Moreira Universidade Federal do Espírito Santo




It is estimated that World population will increase considerably in the coming years. Thus, there is a need to maximize the production of animal protein, of which the pasture  production system is the most economical way. However, abiotic factors influence animal production, with water deficit being the factor that most limits the development of forages.
This research aimed to investigate the tolerance of Urochloa spp. genotypes under periods with water deficit conditions. The experiment was carried out in a randomized block design, under a factorial design. Twelve forage genotypes were evaluated in three periods of water stress, with three replications. There was no interaction effect between the genotype factors and time of stress due to water deficit for all variables. There was a reduction in forage production with the increase of time in water restriction, and a decrease of 23% in leaf mass and 30% in stem. In the case of leaf attributes, there was a decrease of 28% in the area and 21% in the leaf length. For the genotype factor, the G11 material stood out in relation to the others for presenting better agronomic characteristics. However, studies are needed to  demonstrate the superiority of this material in production systems.


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