Diallel analysis of popcorn lines and hybrids for baby corn production

The aim of this study was to evaluate the combining ability of popcorn lines and hybrids with favorable traits for baby corn production, using lines extracted from the major genotypes of the Brazilian germplasm. From nine popcorn lines, derived from the genotypes Zélia, CMS 42, CMS 43, UEM M2, Zaeli and IAC 112, 36 single-cross hybrids were obtained without reciprocals. In partial diallel crosses, 25 single-cross hybrids were obtained, derived from crosses of five lines of the Zaeli (group I) with five lines from IAC 112 (group II). We recommend using lines derived from Zaeli and CMS 42 in hybrid breeding programs for higher ear yields. The lines P9.5.1 and P9.5.5 (group I) and P8.3 and P8.5 (group II) can be recommended for recombination within each group and for the formation of two synthetic populations for recurrent selection, in order to increase ear yield

Interrelationship between morphological, agronomic and molecular characteristics in the analysis of common bean genetic diversity

<div><p>ABSTRACT. The present study aimed to analyze, through 12 morpho-agronomic traits and 18 micro satellite loci, the genetic diversity in 17 common bean accessions from the Bean Germplasm Bank of the Center for Applied Agricultural Research of the State University of Maringá (BGF/Nupagri/UEM), in Paraná State, Brazil. Genetic diversity was assessed by joint analysis of phenotypic and genotypic characteristics using the Genetics platform of SAS software. To that end, a dissimilarity matrix was constructed based on the Jaccard index. This was used to generate a dendrogram via UPGMA hierarchical clustering, validated by multidimensional scaling and nonorthogonal principal components analysis. Based on genetic diversity analysis, the accessions were clustered into two large groups: one consisting of 11 accessions of Andean origin and the other containing six Mesoamerican accessions. The 17 accessions from the BGF/Nupagri/UEM were found to be an important source of genetic variability for inclusion in common bean breeding programs, contributing to the development of cultivars with desirable agronomic characteristics.</p></div

Avaliação do estado nutricional das cultivares de uva itália e rubi no município de Marialva, Estado do Paraná

A técnica do diagnóstico nutricional, para fins de recomendação de adubação mais racional e econômica na viticultura, carece de padrões metodológicos para as condições regionais de cultivo da videira. Com o objetivo avaliar e ajustar os valores padrões, ou faixas limites, de diagnóstico nutricional para videiras, com base em três metodologias de diagnose foliar, para melhor detecção do estado nutricional dos vinhedos, foram averiguados 30 vinhedos comerciais da cultivar de uva de mesa Itália e de 33 vinhedos da cultivar Rubi, no município de Marialva, região Noroeste do Estado do Paraná, empregando as metodologias de diagnose foliar da Califórnia, de Michigan e da África do Sul, na safra normal de 2002. Analisaram-se dados de produtividade e teores de macronutrientes e micronutrientes. Os ajustes nos padrões foram realizados pelo método do nível crítico, por meio do critério da distribuição normal reduzida (NCRIz). A metodologia da Califórnia não se mostrou adequada para as condições regionais. As outras duas metodologias podem ser utilizadas para a diagnose nutricional das videiras do município de Marialva com pequenos ajustes