Data/hora: 09/06/2024 04:45:49

Provedor de dados: | 75
País: | Brazil
Título: | Diallel cross among fresh market tomato inbreeding lines
Autores: | Souza,Lívia M de; Paterniani,Maria Elisa AGZ; Melo,Paulo César T de; Melo,Arlete MT de.
Data: | 2012-06-01
Ano: | 2012
Palavras-chave: | Solanum lycopersicum; Yield components; Fruit quality; Combining ability; Heterosis; Plant breeding.
Resumo: | The general combining ability (GCA), specific combining ability (SCA), and heterosis were studied in a complete diallel cross among fresh market tomato breeding lines with reciprocal excluded. Fifteen genotypes (five parents and ten hybrids) were tested using a randomized complete block design, with three replications, and the experiments were conducted in Itatiba, São Paulo state, Brazil, in 2005/06. The yield components evaluated were fruit yield per plant (FP), fruit number per plant (FN), average fruit weight (FW); cluster number per plant (CN); fruit number per cluster (FC), fruit wall thickness (FT) and number of locules per fruit (NL). Fruit quality components evaluated were total soluble solids (SS); total titratable acidity (TA); SS/TA ratio, fruit length (FL); fruit width (WI); length to width ratio (FL/WI). The data for each trait was first subjected to analysis of variance. Griffing's method 2, model 1 was employed to estimate the general (GCA) and specific (SCA) combining abilities. Parental and hybrid data for each trait were used to estimate of mid-parent heterosis. For plant fruit yield, IAC-2 was the best parental line with the highest GCA followed by IAC-4 and IAC-1 lines. The hybrids IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-4 showed the highest effects of SCA. High heterotic responses were found for fruit yield and plant fruit number with values up to 49.72% and 47.19%, respectively. The best hybrids for fruit yield and plant fruit number were IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-5, for fruit yield and plant fruit number, the main yield components.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000200011
Editor: | Associação Brasileira de Horticultura
Relação: | 10.1590/S0102-05362012000200011
Formato: | text/html
Fonte: | Horticultura Brasileira  v.30 n.2 2012
Fonte: | info:eu-repo/semantics/openAccess