Agronomic performance of cowpea genotypes in southwestern Brazilian Amazon

Abstract: The objective of this work was to evaluate the agronomic performance of cowpea (Vigna unguiculata) genotypes over three crop years, in the ecosystem of Rio Branco, in the state of Acre, Brazil. The experiments were carried out in the 2016, 2017, and 2018 crop seasons, in a randomized complete block design, with four replicates. Eight agronomic traits were evaluated in 14 cowpea genotypes, which included: 12 lines (BDO 1-5-11, BDO 1-5-15, BDO 1-5-19, BDO 1-5-24, PDO 1-5-26, PDO 1-5-4, PDO 1-5-5, PDO 1-5-7, PDO 1-5-8, PDO 1-5-10, PDO 1-5-11, and PDO 1-5-14) and two cultivars (BRS Tumucumaque and BRS Imponente). A significant difference was observed in the genotype x crop year interaction, for most traits. Although there was no statistical difference between genotypes in the studied crop years, dry seed productivity was higher than the national average. All cowpea lines and cultivars from the genetic breeding program show equivalent and favorable agronomic performances in the environmental conditions of Rio Branco. Therefore, these genotypes can be selected for incorporation into the production system of Rio Branco.

摘要：本研究旨在评估巴西阿克里州里约布兰科生态系统中，3个生长季内豇豆（Vigna unguiculata）基因型的农艺表现。试验于2016、2017、2018生长季开展，采用完全随机区组设计，设置4次重复。本研究共评估了14个豇豆基因型的8项农艺性状，其中包括12个品系（BDO 1-5-11、BDO 1-5-15、BDO 1-5-19、BDO 1-5-24、PDO 1-5-26、PDO 1-5-4、PDO 1-5-5、PDO 1-5-7、PDO 1-5-8、PDO 1-5-10、PDO 1-5-11及PDO 1-5-14）与2个栽培品种（BRS Tumucumaque、BRS Imponente）。多数性状的基因型×生长季互作效应显著。尽管供试生长季内不同基因型间无统计学差异，但干籽粒产量均高于巴西全国平均水平。本遗传育种项目所育成的所有豇豆品系与品种，在里约布兰科的环境条件下均表现出相当且优良的农艺表现。因此，可遴选上述基因型应用于里约布兰科的当地生产体系中。