ESTIMATION OF GENETIC PARAMETERS FOR SEVERAL QUALITITIV CHARACTERS IN HYBRIDS OF TOBACCO AT OPEN FIELD

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07/7/2014 9:05 AM

ESTIMATION OF GENETIC PARAMETERS FOR SEVERAL QUALITITIV CHARACTERS IN HYBRIDS OF
TOBACCO AT OPEN FIELD



        Laith Mohammed Jawad Al-Shamma/Department of Biology, College of Science, University of Baghdad. Baghdad-Iraq
 

Fadel Younis Baktash/ Department of Field Crops, College of Agric, University of Baghdad. Baghdad-Iraq.
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 


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