Genetic parameters of tomato families F2:3 in resistance to Ralstonia pseudosolanacearum and Ralstonia solanacearum

• Autor(a) principal: Costa, Kleyton Danilo da Silva
• Data de Publicação: 2018
• Outros Autores: Oliveira, Tâmara Rebecca Albuquerque de, Santos, Ana Maria Maciel dos, Nascimento, Maxwel Rodrigues, Silva, Adriano Marcio Freire, Carvalho Filho, José Luiz Sandes de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Verde de Agroecologia e Desenvolvimento Sustentavel
• Texto Completo: https://www.gvaa.com.br/revista/index.php/RVADS/article/view/5295
• topic: Severidade; Murcha bacteriana; Solanum Lycopersicum; Severity; Bacterial wilt; Solanum Lycopersicum

The tomato (Solanum lycopersicum) is an important crop in Brazil, however, it is susceptible to different types of bacteria races. The objective was to study the genetic parameters of 43 F2:3 families of tomato in resistance to R. pseudosolanacearum and R. solanacearum. The families were obtained from the cross between the cultivars Yoshimatsu (resistant) and IPA-7 (susceptible). Two experiments were carried out in a greenhouse at Universidade Federal Rural de Pernambuco, one for each species of the genus R. spp. A randomized block design was used with four replications and 45 treatments. There is less influence of the environment, and greater variability for R. pseudosolanacearum than for R. solanacearum, both among and within families. For R. pseudosolanacearum it is recommended to select 10 days between families, and 20 days between and within families. R. solanacearum should be selected from families only at 20 days. Larger amounts of resistant plants were identified for R. pseudosolanacearum at any time of evaluation than for R. solanacearum.