ПРОЯВ ЕФЕКТУ ГЕТЕРОЗИСУ ТА СТУПЕНЯ ФЕНОТИПОВОГО ДОМІНУВАННЯ У ГІБРИДІВ F1 РІПАКУ ЯРОГО
Journal Title: Science Review - Year 2018, Vol 2, Issue 2
Abstract
The display of a genuine, hypothetical and competitive heterosis on the elements of the spring rape productivity of the first generation hybrids was revealed. The degree of phenotypic dominance in F1 hybrids is determined. The best hybrid combinations were selected, with the height of the stem - Sriblastiy 1 x Aidar, which showed a positive over domination on this basis. However, according to the results of the research on the manifestation of competitive, true, hypothetical and degree of phenotypic dominance heterosis, it should be noted that most hybrids have shown depression or negative dominance, that is, they have formed the height of the stem smaller than the parent forms and the standard variety, which are of practical interest as either the underage or dwarf hybrids of the first generation of spring rape. The number of pods on the central inflorescence - Khunter x Khidalgo, Khunter x Magnat and the number of seeds per pod - Sriblastiy 1 x Aidar, Sirius x Mariia, which showed a positive over dominance and are of practical interest for further breeding work. The degree of dominance and the effect of heterosis in the first-generation hybrids are due to the genotypic diversity of the source cross-linking components, and also it is the result of the interaction of the genotype with the environmental conditions.
Authors and Affiliations
Ю. О. Куманська, С. В. СУХАР
Keywords
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