Genotype Genotype X Environmental Interaction And Environmental Effects On Yield Yield Components Percent Seed Protein Protein Quality In Cowpeas

Abstract

Cowpea, Vigna unguiculata (L.) Walp. is extensively grown in tropical and sub-tropical environments for leaf, immature and mature seeds. It is an important component in the diets of many people and in certain places, it may be the principal source of protein (33). A wide spectrum of local cultivars is grown throughout the producing regions, reflecting consumer preferences and natural selection for types that are comparatively successful under variable and, often adverse climatic and edaphic conditions. There is limited information concerning the genetic variability for yield, yield components and the nutritive value of the edible parts and much still needs to be done to elucidate the role of the genotype x environmental interaction on yield, yield components and quality of cowpea edible parts. Such information is crucial when one considers that production of most crop varieties has been pushed to less and less favorable environments following encroachment of hitherto unsettled areas as a result of population expansion i A need therefore exists for an evaluation of the interrelationships that may exist between yield and important agronomic and quality traits and how these vary with time and location.