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Combining ability of summer-squash lines with different degrees of parthenocarpy and PRSV-W resistance

Overview of attention for article published in Genetics and Molecular Biology, August 2011
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Title
Combining ability of summer-squash lines with different degrees of parthenocarpy and PRSV-W resistance
Published in
Genetics and Molecular Biology, August 2011
DOI 10.1590/s1415-47572011005000039
Pubmed ID
Authors

Douglas Willian Nogueira, Wilson Roberto Maluf, Antonia dos Reis Figueira, Gabriel Mascarenhas Maciel, Luiz Antonio Augusto Gomes, Cesar Augusto Ticona Benavente

Abstract

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 × 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-037G-77-03-05-01-04-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 F(1) hybrid was identified with a satisfactory degree of parthenocarpy, resistance to PRSV-W and high fruit-yield.

Mendeley readers

The data shown below were compiled from readership statistics for 19 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 2 11%
Spain 1 5%
Unknown 16 84%

Demographic breakdown

Readers by professional status Count As %
Researcher 6 32%
Student > Master 3 16%
Other 2 11%
Professor > Associate Professor 2 11%
Student > Doctoral Student 1 5%
Other 2 11%
Unknown 3 16%
Readers by discipline Count As %
Agricultural and Biological Sciences 12 63%
Biochemistry, Genetics and Molecular Biology 4 21%
Unknown 3 16%