Diallelic analysis in assessing the potential of maize hybrids to generate base-populations for obtaining lines
DOI:
https://doi.org/10.5433/1679-0359.2013v34n1p7Keywords:
Combining ability, Diallel, Maize hybrid, Zea mays L.Abstract
Twelve commercial maize hybrids were intercrossed in a complete diallel. These genotypes and three checks were evaluated in lattice design with three replications in the South-Central region of Parana State, in Laranjeiras do Sul, Guarapuava and Cantagalo. Data of yield of husked ear, plant height and ear height were submitted to joint diallel analysis according to Griffings method 4, i.e. only F1 were evaluated. Significant effect was found for general combining ability (GCA), specific combining ability (SCA) and interaction ‘GCA x locations’ for all characters. The interaction ‘SCA x location’ was not significant for both characters. Hybrids P30F53 and AS1575 showed positive and high estimates of GCA for yield of husked ear and high mean of yield, being interesting for the generation of populations with potential for intrapopulation breeding to obtain superior lines. The hybrids P30F44 and 2B688 are potentially indicated to generate populations for interpopulational breeding, since their high in yield of husked ears, positive GCA and SCA estimates, besides favorable estimates for ear height.
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