engleski

Genetic analysis of some chemical traits in burley tobacco

Four burley tobacco cultivars (TN 86, BL1, Hy 71 and Poseydon), and their six F1 hybrids (Hy 71 x TN 86, Hy 71 x BL1, Hy 71 x Poseydon, Poseydon x BL1, Poseydon x TN 86 and TN 86 x BL1) were separated for the needs of this study. Selected materials from a four-year trial, set up according to the RCBD in four replications, were used to study the manner of inheritance of nicotine, proteins, total nitrogen and ash content by means of the components of genetic variance and regression analysis. According to the components of genetic variance, the significant additive variance was estimated for nicotine, proteins and ash content, while the significant additive and non additive variance were estimated for total nitrogen content. Other results point to the presence of overdominant inheritance for all the traits studied, but not for all investigation years, as well as to the preponderance of dominant genes over recessive genes, however not of their symmetric distribution.

Nicotiana tabacum L.; Burley; Components of genetic variance; Regression analysis; Chemical traits

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