Genetic divergence and discard of variables in lettuce cultivated under hydroponic system - DOI: 10.4025/actasciagron.v26i2.1894

• Autor(a) principal: Oliveira, Antonio Carlos Baião de
• Data de Publicação: 2008
• Outros Autores: Sediyama, Maria Aparecida Nogueira, Pedrosa, Marinalva Woods, Garcia, Neusa Catarina Pinheiro, Garcia, Silvana Lages Ribeiro
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1894
• topic: Lactuca sativa; variabilidade genética; análise multivariada; agrupamento; características agronômicas; 5.00.00.00-4 Ciências Agrárias

It was studied the genetic variability of 17 lettuce cultivars, types Butter, Crisp and Iceberg, according to agronomic traits and multivariate procedures. It aims to select divergent cultivars with better performance designed to hydroponic system culture. The importance of the traits for divergence was, also, evaluated by the sequential discards of the variables, according its relative contributions. The trial was carry out in greenhouse, Epamig, Viçosa-MG, in summer of 1999, using randomized blocks with three replicates. Six plants were harvested 46 days after the sowing, and evaluated in ten traits related to the yield. The data were analyzed by Tocher, single linkage, and canonical variables grouping methods. The Mimosa, Brisa, Regina, Monalisa and OGR are the most appropriated cultivars to integrate in specific crossings programs for hydroponic culture. They were more genetically divergent and had good agronomic qualities. Some traits did not affect the original grouping, so they could be eliminated in future studies of lettuce genetic divergence