FULL DIALLEL CROSSES AND ESTIMATION GENETICPARAMETERS FOR SOME QUALITATIVE CHARACTERSOF TOBACCO HYBRIDS IN GREEN HOUSE

Abstract

Full diallel crosses conducted to develop tobacco hybrids using three cultivars;
Corjo (A), Sumer48 (B) and Croillo (C), during 2004, Hybrid trail carried out in the
green house using Randomized Complete Block Design with 3 parents, 6 hybrids
and 2 control, Habana and CV. 48.Significant differences were found among parents
and hybrids in studied characters except necotin and ash percentages. The crosses
(AxB) and (BxC) superior in pH (6.71 & 6.37), while the crosses (AxB) superior in
sugar percentage, the reciprocal hybrid (BXA) had highest burne speed (0.101
mm/sec.). Genetic parameters analysis revealed, that average degree of dominance
were higher than one, broad sence heratibiliy, also highest, narrow sence heratibility
were lowest. It was recommended hybridization method in the improvement of pH,
burne speed and sugar percentage of tobacco, using best hybrid (AXB).