O objetivo deste trabalho foi avaliar o potencial ornamental de dez acessos de pimenta Capsicum spp. procedentes da Coleção de Germoplasma da Universidade Federal do Piauí, Brasil. O experimento foi conduzido em casa de vegetação, no Departamento de Fitotecnia, do Centro de Ciências Agrárias, no município de Teresina, Piauí, obedecendo ao delineamento experimental inteiramente casualizado, com três repetições. Na caracterização morfoagronômica dos acessos, conforme orientação do Bioversity International, utilizaram-se os seguintes descritores qualitativos e quantitativos para o gênero Capsicum: forma da folha, hábito de crescimento da planta, antocianina no nó da planta, posição da flor, cor da corola, cor do fruto no estado intermediário e maduro, forma do fruto, forma do ápice do fruto, textura da epiderme do fruto, comprimento do fruto, comprimento do pedicelo, persistência do fruto maduro e altura da planta. Dentre os dez acessos avaliados, sete foram considerados com potencial ornamental: CGC-06 (C. chinense), CGC-07 (C. chinense), CGC-11 (C. annuum var. glabriusculum), CGC-23 (C. chinense), CGC-36 (C. annuum var. glabriusculum), CGC-59 (C. annuum var. glabriusculum) e CGC-67 (C. annuum var. glabriusculum). O CGC 11 apresentou estética mais harmoniosa, com flores eretas, as quais são de fácil percepção; frutos eretos e vistosos e folhas de formato lanceolado.

In this paper we analyzed the genetic diversity of ten accessions of Capsicum sp from the Active Germplasm Bank of Federal University of Piauí based on quantitative morphological descriptors relevant to productivity, as well as for ornamental environments peppers. This analysis was performed using the Tocher clustering methods, hierarchical (UPMGA), with the use of Malahobis away as dissimilarity measure. From the results showed a significant divergence among accessions, and the BAGC 26 access, the species C. baccatum, the most dissimilar in relation to BAGC BAGC 40 and 59, the species C. annuum. The greatest contribution descriptors for genetic divergence of the plants analyzed peppers were wide of fruit, fruit length and weight of the fruit. Despite the germplasm bank of Federal University of Piauí (UFPI) be recent and still have a small number of hits, the data here show significant genetic variability among the materials analyzed, a condition that, although preliminary, favors the implementation of peppers breeding program in the state Piaui.

ABSTRACT Genotypes can respond differently to environments; thus, studies on adaptability and production stability are important to assist breeders in the identification and recommendation of cultivars. The objective of this work was to determine the adaptability and production stability of cowpea genotypes focused on subsidize recommendations of cultivars for green grain production in the state of Ceará, Brazil. Five assays were conducted in different locations in two climatic regions of the state of Ceará: a tropical mild hot semiarid region encompassing the municipalities of Acaraú, Pentecoste, and Crato, and a tropical hot semiarid region encompassing the municipalities of Mauriti and Madalena. Twenty cowpea genotypes-12 elite lines and 8 cultivars-were evaluated for cultivation value and use, using a randomized block design, with four replications. The results were subjected to analyses of variance and adaptability and green grain yield stability analyses by GGE biplot multivariate analysis. The effects of genotypes, environments, and G×E were significant, denoting different responses of genotypes in different locations. The results of the adaptability and stability analyses by the GGE biplot method showed that the two principal components explained 72.17% of the total variation, allowing reliable bidimensional projections. The municipality of Crato was the ideal location for tests and the lines MNC05-847B-123 and MNC00-595F-27 showed good production, adaptation, and stability, and can be recommended for green grain production in the state of Ceará, Brazil.

Widely grown in diverse regions of Brazil, cowpea has high nutritional value, is easily cultivated, and can fix nitrogen (N) symbiotically. Although there are commercial inoculants for cowpea, it is difficult for small producers to acquire them. A nodule preparation is an inexpensive and easily prepared option for small farmers. The aim of this study was to test a nodule preparation as a low-cost inoculant, increasing cowpea seed grain production. Thus, different cowpea cultivars were compared in two locations, the municipalities of Crato and Madalena, both in Ceará. Two field experiments were performed to evaluate gain derived from this inoculation method. The nodule preparation was created from nodules removed from roots of cowpea grown in the experimental locations. The nodules were macerated and added to water, obtaining a liquid (inoculant) that was applied to the seeds. The experiment was conducted following a randomized block design with four replicates and a 4 × 3 factorial arrangement (N sources × cultivars). Results indicate little interaction between the sources of N and the cultivars because only the shoot dry matter (Crato experiment) exhibited interaction between both. The differences provided by the nodule preparation were more notable among cultivars and between the environments, Crato and Madalena. The nodule preparation differed little from the commercial inoculant; they were comparable. However, gain in relation to the zero control also proved to be reduced, indicating little contribution of the nodule preparation to cowpea under the conditions tested.

Cowpea is one of the main food crops in the Northeast region of Brazil, thus, breeders have carried out researches to identify genotypes with good production response and attributes that satisfy growers and consumer market demands for green beans and pods. Therefore, the objective of this work was to develop a selection index that assists in the recommendation of cowpea cultivars for green bean production and select the best genotypes based on this index. Twenty cowpea genotypes, including lines and cultivars, were evaluated for eleven characters in five locations in the state of Ceará, Brazil: Acaraú, Pentecoste, Crato, Mauriti, and Madalena. A randomized block design was used, with four replications. The characters evaluated were: number of days for the beginning of flowering (NDF), number of days for maturation (NDM), plant height (PH), green pod length (GPL), number of beans per green pod (NBP), green pod weight (GPW), bean weight per green pod (BWP), one hundred green bean weight (100GBW), bean index (BI), green pod yield (GPY), and green bean yield (GBY). The results of the characters were subjected to analysis of relative importance, estimated by principal component analysis and analysis of factors, and used to develop selection indexes. The following index was obtained: I 3 = 0.079 NDF -0.083 PH + 0.119 GPL + 0.034 GPW -0.176 100GBW + 0.340 GPY. This index indicated that the genotypes MNC05-847B-123, Azulão-MS, MNC00-595F-27, MNC99-541F-15, MNC05-835B-16, and MNC00-595F-2 are the most promising for green bean production.

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