Avaliação de genótipos de melancia para resistência ao Papaya ringspot vírus, estirpe melancia

Vieira, José Cavalcante Souza; Ávila, A. C. de; Silva, Giovani Olegário da

doi:10.1590/s0102-05362010000100002

Cited by 9 publications

(9 citation statements)

References 6 publications

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“…The virus is transmitted in a non-persistent manner by numerous species of aphids, including Myzus persicae and Aphis spp. (Vieira et al 2010). It has become one of the most limiting factors for cucurbit crops in warm climate countries like Brazil, where aphids can easily survive throughout the year (Nascimento et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Inheritance of resistance to papaya ringspot virus-watermelon strain (PRSV-W) in 'Whitaker' summer squash line

Menezes

Maluf

Faria

et al. 2015

Crop Breed. Appl. Biotechnol.

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Section: Introductionmentioning

confidence: 99%

Inheritance of resistance to papaya ringspot virus-watermelon strain (PRSV-W) in 'Whitaker' summer squash line

Menezes

Maluf

Faria

et al. 2015

Crop Breed. Appl. Biotechnol.

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“…Fontes de resistência a esses vírus têm sido identificadas em várias espécies de cucurbitáceas (OLIVEIRA et al, 2002;STRANGE et al, 2002;SVOBODA;POLÁK, 2004;VIEIRA et al, 2010).…”

Section: Introductionunclassified

HERANÇA DA RESISTÊNCIA AO Papaya ringspot virus EM MELANCIA

Silveira

Queiróz

Lima³

et al. 2015

Rev. Caatinga

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RESUMO -Com o objetivo de estudar o controle genético da resistência a Papaya ringspot virus, type watermelon (PRSV-W) em melancia foram avaliadas a cultivar Crimson Sweet (CS) (P 1 -suscetível) e L26 proveniente de PI 244019 (P 2 -resistente), bem como as populações F 1 , F 2 , RC 11 e RC 21 , provenientes do cruzamento das duas linhas. As avaliações foram realizadas em casa de vegetação mediante inoculações artificiais com PRSV-W. Foi realizada avaliação sintomatológica através de escala de notas, bem como avaliação sorológica contra antissoro específico para PRSV-W através do teste ELISA indireto. As estimativas das variâncias das populações P 1 , P 2 , F 1 , F 2 , RC 11 e RC 21 foram utilizadas para obtenção das variâncias genética (σ . A hipótese de herança monogênica foi testada sob diferentes graus médios de dominância presumido, bem como pelo método da máxima verossimilhança. A distribuição de frequência de plantas resistentes nas populações segregantes diferiu de uma distribuição baseada em herança monogênica para todos os graus médios de dominância presumidos, de modo que a hipótese de herança monogênica foi rejeitada mostrando que essa característica em L26 é controlada por mais de um gene maior com a presença de modificadores. O modelo aditivo-dominante foi adequado para explicar o tipo de ação gênica envolvida e os efeitos epistáticos não foram importantes na expressão da resistência. A estimativa do grau médio de dominância indicou efeito de dominân-cia completa. E as herdabilidades, no sentido amplo, das duas variáveis analisadas foram intermediárias. Palavras-chave: Citrullus lanatus. Herança. PRSV-W. INHERITANCE OF RESISTANCE TO Papaya ringspot virus IN WATERMELONABSTRACT -Aiming to study the genetic control of Papaya ringspot virus, type watermelon (PRSV-W) in watermelon, the cultivar Crimson Sweet (P 1 -susceptible) and L26 derived from PI 244019 (P2 -resistant), as well as the resulting populations F 1 , F 2 , RC 11 and RC 21 of the cross of both lines were evaluated. The trials were carried out in a greenhouse, and the evaluations were done using artificial inoculations with PRSV-W isolates. The seedling symptoms were recorded using a graded scale, and the serological evaluation was done with specific antiserum using indirect ELISA. The estimated variances of the populations were used to obtain the genetic (σ heritabilities. The hypothesis of monogenic inheritance was tested under different presumed average degrees of dominance as well as using the maximum likelihood. The distribution of resistant plants in the segregating populations was different from a distribution based on monogenic inheritance for all presumed average degrees of dominance, therefore, the hypothesis of monogenic inheritance was rejected indicating that this character in the line L26 is controlled by more than one major gene with the presence of modifiers. The additive-dominant model was adequate to explain the type of gene action involved, and the epistatic effects were not important in the expression of the resistance. ...

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“…The watermelon [Citrullus lanatus (Thumb.) Matsum & Nakai] is subject to various diseases caused by viruses that can reduce both its yield and quality (Vieira et al, 2010). In Brazil, the viruses of the family Potyviridae has received more attention of the breeders for being factors limiting to watermelon growing.…”

Section: Introductionmentioning

confidence: 99%

“…Among the species of the genus Potyvirus affecting cucurbitaceae, Papaya ringspot virus, type W has been the most important in the watermelon crops and seeds of resistant cultivars are not available on the market up to now (Vieira et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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

Chaves¹,

Santos²,

Alves³

et al. 2014

RCA

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Papaya ringspot virus, watermelon type (Pappaya ringspot virus-PRSV-W) is the main watermelon viral disease in Brazil. The work intended to evaluate the genetic divergence of watermelon lines type Crimson Sweet obtained from the cross of the resistant accession PI 595201 with Crimson Sweet and selected for to PRSV-W. Thirteen characteristics in 23 lines of the cross PI 595201 with Crimson Sweet and two control cultivars were evaluated. The genetic divergence was evaluated by multivariate procedures such as the Mahalanobis distance and by the Tocher's optimization grouping and nearest neighbor methods. The characteristics which contributed the most to the genetic divergence of the watermelon genotype were pulp coloration, total soluble solids, pH and titratable acidity. The Mahalanobis distance by the Tocher optimization grouping and nearest neighbor methods 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 are

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Avaliação de genótipos de melancia para resistência ao Papaya ringspot vírus, estirpe melancia

Abstract: Evaluation of watermelon genotypes for resistance to Papaya ringspot virus, type watermelon

Cited by 9 publications

References 6 publications

Inheritance of resistance to papaya ringspot virus-watermelon strain (PRSV-W) in 'Whitaker' summer squash line

Inheritance of resistance to papaya ringspot virus-watermelon strain (PRSV-W) in 'Whitaker' summer squash line

HERANÇA DA RESISTÊNCIA AO Papaya ringspot virus EM MELANCIA

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

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