The effect of heterosis in tobacco and methods of its fixing
DOI:
https://doi.org/10.24144/1998-6475.2021.50-51.61-69Keywords:
tobacco, collection, varieties, hybridization, heterosiseffect, apomixis.Abstract
The paper reveals the detailed evaluation issue of tobacco collection material using cluster analysis and further selection in initial forms of diallel crossing in order to obtain hybrids with a high effect of heterosis. The degree of dominance and the effect of heterosis in F1 hybrids are due to the genotypic diversity of the original components of the cross, and it is also the result of the interaction of the genotype with environmental conditions. The best hybrid combinations are distinguished by characteristics: plant height – up to 231 cm; number of leaves – 30.1 pieces of leaves per stem; leaf width – 40.9 cm; leaf length – 68.1 cm, which showed a positive dominance and have a practical interest for the consolidation of heterosis through apomixis and further testing in the competition nursery.
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