Inheritance of the sizes of leaves in hybrid combinations Burley tobacco

Yovko Dyulgerski

Abstract: The character of inheritance, inheritability coefficient, and expressions of heterosis transgression and depression referring to the length and width of the leaves in Burley tobacco are established. For this purpose, were investigated populations of Р1, Р2, F1 and F 2 of seven hybrids Burley tobacco, involving local and introduced varieties. Results showed that in a hybrid combination inheritance of the length and width of leaves is overdominantly or semidominantly and always in the direction of the parent with the higher values of research sign. In the explored options large leaf tobacco Burley, the manifestations of heterosis and transgression are no economic importance. The minimal number of genes affecting the expression of sizes of leaves is small and does not vary in different crosses. Manifestation of negative epistat interactions makes very difficult selection on the sizes of the leaves especially their width. Obtained are low values of the coefficient of heritability in width of leaves and medium ones in length of leaves, indicating that selection of size the leaves will be effective in later hybrid generations.

Keywords: Burley tobacco; hereditability; heterosis; hybridological analysis; inheritance; length of leaves; width of leaves

Date published: 2021-06-24