Studied are inheritance, acts of heterosis and transgression, the number of genes and genetic character of Interaction, heritability coefficients, in terms of plant height and number of leaves in crosses Virginia tobacco. For the purpose of the study population are P 1 , P 2 , F 1 and F 2 of seven hybrid combinations. In our study samples Virginia tobacco inheritance of plant height and number of leaves overdominantly or additively, in the direction of the parent with the higher or lower values. Data of the genetic analysis showed that the number of genes affecting the expression of the trait plant height is 13 to 16, and when the number of leaves-1 or 2. As regards the height of the plants is observed negative epistaz, while the number of leaves and less positive one. Are established a high coefficient of heritability of plant height and number of leaves of a plant. The coefficients for the heritability and efficiency in selection by phenotype indicate that the selection of genotypes with larger values of the height of the plants will be more effective in the F 5-F 6 , and the genotype of a large number of leaves in the still earlier hybrid generations.
The aim of current research is to determine genetic effects in relation to inheritance of plant height and leaves number regard to their use for the Virginia tobacco breeding. The experimental work was carried out on the field of the Tobacco and tobacco products Institute, Markovo, Bulgaria. Coefficient of heritability and selection, the number of genes, transgressions and heterosis of plant height and leaves number were studied. For this purpose P 1 , P 2 , F 1 and F 2 populations of seven hybrid combinations were analyzed. The data from conducted analysis showed that inheritance of the plant height and tobacco leaves number is overdominantly, in the direction of the parent with the higher trait values.The number of genes influencing the plant height expression varies in a wide range (14-17) and genes number affecting tobacco leaves is 1 or 2. Negative epistasis was observed for the plant height inheritance, while epistatic interactions of genes controlling leaves number was weaker but positive one. There were establish high values for heritability coefficient of plant height and average one of leaves number. Based on the conducted analysis it was found that the mass selection by phenotype for studied traits would be more effective in the F 5 -F 6 hybrid generations.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.