ESTIMATION OF GENETIC PARAMETERS FOR SEVERALQUALITITIV CHARACTERS IN HYBRIDS OF TOBACCO ATOPEN FIELD

Abstract

Full diallel crosses conducted to develop tobacco (Nicotiana tabacum L) hybrids
using three cultivars; Corjo (A), Sumer48 (B) and Croillo (C), during 2004. Hybrid
trail carried out at the open field using Randomized Complete Block Desighn with 3
parents, 6 hybrids and 2 control, Habana and CV. 48.Significant differences were
found among studied characters except the pH of the tobacco. The hybrid (AxB) had
higher percentage of nicotine (2.62%), ash (9.60) and sugar percentage (8.01), while
the hybrids (AxC) and (BxC) revealed highest burning speed (0.056 & 0.055).
Several crosses revealed positive and negative heterosis in the studied traits. Genetic
analysis showed that the studied characters were under non additive gene action. It
was concluded that the hybridization is the best method to improve those traits.