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奥布兰科生态系统中豇豆（Vigna unguiculata）基因型在三个种植年度的农艺表现。实验于2016、2017及2018种植季开展，采用完全随机区组设计，设置4次重复。本研究共测定14份豇豆基因型的8项农艺性状，其中包括12个育种品系（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）。结果显示，多数性状的基因型×种植年度互作效应达显著水平。尽管供试基因型在各研究种植季间无统计学差异，但干籽粒产量均高于全国平均水平。所有来自该遗传育种项目的豇豆品系与品种，在里奥布兰科的环境条件下均展现出相当且优良的农艺表现。因此，这些基因型可被筛选并纳入里奥布兰科地区的豇豆生产体系。