| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Combining ability of summer-squash lines with different degrees of parthenocarpy and PRSV-W resistance
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| Autores: |
Nogueira,Douglas Willian
Maluf,Wilson Roberto
Figueira,Antonia dos Reis
Maciel,Gabriel Mascarenhas
Gomes,Luiz Antonio Augusto
Benavente,Cesar Augusto Ticona
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| Data: |
2011-01-01
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| Ano: |
2011
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| Palavras-chave: |
Cucurbita pepo
Heterosis
Hybrids
Potyvirus
Papaya ringspot virus
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| Resumo: |
The aim was to assess heterosis in a set of 16 summer-squash hybrids, and evaluate the combining capacity of the respective parental lines, which differed as to the degree of parthenocarpy and resistance to PRSV-W (Papaya Ringspot Virus-Watermelon strain). The hybrids were obtained using a partial diallel cross design (4 x 4). The lines of parental group I were 1 = ABX-037G-77-03-05-01-01-bulk, 2 = ABX-037G-77-03-05-03-10-bulk, 3 = ABX-037G77-03-05-01-04-bulk and 4 = ABX-037G-77-03-05-05-01-bulk, and of group II, 1' = ABX-037G-77-03-05-04-08-bulk, 2' = ABX-037G-77-03-05-02-11-bulk, 3' = Clarice and 4' = Caserta. The 16 hybrids and eight parental lines were evaluated for PRSV-W resistance, parthenocarpic expression and yield in randomized complete-block designs, with three replications. Parthenocarpy and the resistance to PRSV-W were rated by means of a scale from 1 to 5, where 1 = non-parthenocarpic or high resistance to PRSV-W, and 5 = parthenocarpic or high susceptibility to PRSV-W. Both additive and non-additive gene effects were important in the expression of parthenocarpy and resistance to PRSV-W. Whereas estimates of heterosis in parthenocarpy usually tended towards a higher degree, resistance to PRSV-W was towards higher susceptibility. At least one F1 hybrid was identified with a satisfactory degree of parthenocarpy, resistance to PRSV-W and high fruit-yield.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400014
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572011005000039
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.34 n.4 2011
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| Direitos: |
info:eu-repo/semantics/openAccess
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