Abstract
Abstract: The objective of this work was to obtain cowpea (Vigna unguiculata) progenies with compound inflorescences, short peduncles, early cycle, good plant architecture, and high-yielding potential. The initial genetic material consisted of 453 F2:3 progenies, selected from ten crosses and evaluated using Federer’s augmented block design, with two controls. Of these, 60 progenies from the F4:5 and F4:6 generations were selected and assessed in two consecutive experiments, both in a 8x8 lattice design with four controls and four replicates. Early selection was efficient at fixing the evaluated traits. A wide genetic variability was detected among and within progenies. The estimated and obtained heritability and genetic gains in the F4:5 and F4:6 progenies indicate the possibility of selection of early progenies with short peduncles, compound inflorescences, and productivity similar to or greater than that of the commercial cultivars used as controls.
Highlights
Cowpea [Vigna unguiculata (L.) Walp.] is a widely adapted legume grown in tropical and subtropical regions
In some states of those regions, common bean (Phaseolus vulgaris L.) and cowpea are grown in the same farm
332 individual plants were selected based on the traits related to plant architecture and cycle
Summary
Cowpea [Vigna unguiculata (L.) Walp.] is a widely adapted legume grown in tropical and subtropical regions. The species is cultivated in 97 countries, at a higher or lower scale (Freire Filho, 2011). In Brazil, cowpea is mainly grown in the Northern, Northeastern, and Central-West regions. In the Central-West, cowpea is incorporated in productive arrangements as a second crop after soybean [Glycine max (L.) Merr.] and rice (Oryza sativa L.), and, sometimes, as the main crop (Freire Filho, 2011). In some states of those regions, common bean (Phaseolus vulgaris L.) and cowpea are grown in the same farm. For this reason, the Systematic Survey of Agricultural Production of Instituto Brasileiro de Geografia e Estatística (IBGE, 2018) publishes data of these two species together. The actual contribution of cowpea for total bean production is still
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