ADAPTABILITY AND STABILITY OF GRAIN YIELD IN COWPEA UNDER DIFFERENT BIOMETRICS

Abstract

This study evaluated the statistical methods for adaptability and stability analysis of grain yield in cowpea genotypes and indicated the genotypes most adapted and stable to environmental conditions of Ceará State. It was used data of grain yield of cowpea from four environments in Ceará, testing 22 genotypes, and using the following methods: Traditional, Plaisted and Peterson, Wricke, Finlay e Wilkinson, Eberhart and Russell, Linn and Binns, and Annicchiarico. We recommend using the methods Annicchiriaco and Linn and Bins together with the method of Eberhart and Russell. The genotypes CE-31, CE-73, CE-77, CE-949 and CE-956 are the most adapted and stable. The latter two are suitable for cultivation in production system with more technology.