Selection of high-performance black-eyed cowpea (Vigna unguiculata) through GYT biplot analysis: a new methodology based on multiple characteristics

Cowpea bean is a common crop quite appreciated in Brazil. However, it known that its low yield depending on soil and climatic conditions. The aim of this research the selection high-performance black-eyed cowpea through GYT biplot analysis. Twelve (12) strains were assessed between 2016 and. study followed randomized complete block design, with four repetitions; two commercial cultivars used ascheck. following variables assessed: number days required for flowering, final stand, value cultivation, pod yield, length, mean grains per grain weight. analysis variance showed genetic variability strains, differences years different strain-performance each growing year. Based graph, cultivar BRS Itaim, L9 L7 recorded best performance set characteristics. Variable ‘pod length’ had positive correlation to bedding, flowering pod. ‘100-grain weight’ weight Strains L9, Itaim regarding