Data/hora: 09/06/2024 14:39:43

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Combining ability of summer-squash lines with different degrees of parthenocarpy and PRSV-W resistance	
Autores: 	Nogueira,Douglas Willian; Maluf,Wilson Roberto; Figueira,Antonia dos Reis; Maciel,Gabriel Mascarenhas; Gomes,Luiz Antonio Augusto; Benavente,Cesar Augusto Ticona.	
Data: 	2011-01-01	
Ano: 	2011	
Palavras-chave: 	Cucurbita pepo; Heterosis; Hybrids; Potyvirus; Papaya ringspot virus.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400014	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572011005000039	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.34 n.4 2011	
Fonte: 	info:eu-repo/semantics/openAccess