Inheritance of the height of plants and number of leaves by hybrid combination Virginia tobacco

Yovko Dyulgerski

doi:10.5937/aaser1437061d

Abstract

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 P1, P2, F1 and F2 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 F5 - F6, and the genotype of a large number of leaves in the still earlier hybrid generations.

Highlights

The height of plants and the number of leaves is one of the most important varieties characteristics of the tobacco (Kirkova, 2005; Radоukova, 2008; Risteski et all, 2012).The feature height of plants is polygenic determined and strongly influenced by environmental conditions (Ganusheva et all. 2001; Murzova et all, 2005)
The purpose of this study is by application of genetic analysis to identify the character of inheritance, the manifestations of heterosis and transgression, the number of genes that differ in the starting parent form, the extent of genetic interaction, coefficient of heritability and mass selection with respect to the feature height plants and the number of leaves for selection of desirable genotypes Virginia tobacco
Heterosis of significant figures only occurs in Hybrid 722 (K 730 x C 254) and its manifestation is the limit of significance

Summary

Introduction

The height of plants and the number of leaves is one of the most important varieties characteristics of the tobacco (Kirkova, 2005; Radоukova, 2008; Risteski et all, 2012).The feature height of plants is polygenic determined and strongly influenced by environmental conditions (Ganusheva et all. 2001; Murzova et all, 2005). The height of plants and the number of leaves is one of the most important varieties characteristics of the tobacco (Kirkova, 2005; Radоukova, 2008; Risteski et all, 2012). Krаsteva (1983) observed оverdominantly inheritance of plant height in Virginia and Burley tobaccos. Sastry and Rrasada Rao (1980) in Burley tobacco found that with prevailing important for the sign are the dominant gene effects. (1985) in crosses of Bidi tobacco and according Torrecila and Barroso (1980) in large-leaf tobacco, inheritance of plant height are observed as additive and notadditive (dominant and epistative) gene effects. Chang et all (1980) at Virginia tobacco for height of the plants found that the main type of inheritance is additive. When inheriting of the trait plant height, more important are the dominant effects of the additive (Chinchev, 1979). Noveva et all (1984) found dominantly and overdominantly inheritance in F1 hybrid combinations of tobacco Virginia, while hybrids with participation of Burley tobacco dominantly

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