Correlation and path analysis in components of grain yield of cowpea genotypes

Revista Ciência Agronômica

Francisco Ronaldo Belém Fernandes¹  Elizita Maria Teófilo¹  Wener Santos de Almeida¹  Cândida Hermínia Campos de Magalhães Bertini¹ 

[1] Universidade Federal do Ceará;

关键词: Vigna unguiculata;    Genotype x environment;    Direct and indirect effects;   

DOI  :  10.1590/S1806-66902014000400010

来源: DOAJ

【 摘 要 】

This study aimed at verifying the effect of genotype x environment interaction on the relative contribution of yield components and final production of different cowpea genotypes. For this, data of yield components of 22 cowpea genotypes were evaluated in four environments in the State of Ceará. A one-way ANOVA tested the variability between genotypes and the Scott-Knott test compared the mean values of the genotypes. The correlations were estimated by a path analysis. A differentiated response from the genotypes to each environment was observed for all traits examined, indicating the need to perform the test for each situation separately. The number of pods per plant is the yield component with great potential of genetic gain in additional cycles of selection of more productive genotypes. The number of pods per plant and the number of grains per pod were the yield components with greater direct effects on the productivity.

【 授权许可】

Unknown