Genetic divergence between watermelon lines selected for resistance to Pappaya ringspot virus, type W

• Autor(a) principal: Chaves, Prínscilla Pâmela Nunes
• Data de Publicação: 2014
• Outros Autores: Santos, Gil Rodrigues dos, Alves, Anatércia Ferreira, Carline, João Víctor Gonçalves, Lopes, Danilo Alves Porto Silva, Nascimento, Ildon Rodrigues
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/1419

Papaya ringspot virus, watermelon type (Pappaya ringspot virus - PRSV-W)is the main watermelon viral disease in Brazil. The work intended to evaluate the geneticdivergence of watermelon lines type Crimson Sweet obtained from the cross of theresistant accession PI 595201 with Crimson Sweet and selected for to PRSV-W. Thirteencharacteristics in 23 lines of the cross PI 595201 with Crimson Sweet and two controlcultivars were evaluated. The genetic divergence was evaluated by multivariate proceduressuch as the Mahalanobis distance and by the Tocher’s optimization grouping and nearestneighbor methods. The characteristics which contributed the most to the genetic divergenceof the watermelon genotype were pulp coloration, total soluble solids, pH and titratableacidity. The Mahalanobis distance by the Tocher optimization grouping and nearest neighbormethods separated the lines into two distinct groups. The line WMX-001G-09-04-58-07pl#08 of group II was the most dissimilar in relation to the others of group I, which areWMX-001G-09-04-03-03pl#18, WMX-001G-09-04-03-03pl#21, WMX-001G-09-04-03-03pl#22, WMX-001G-14-02-55-01pl#07, WMX-001G-14-02-55-01pl#15 and CrimsonSweet – (Nova Crimson Sweet - Agristar). Crosses between genotypes of different groupscan result into superior hybrids.