Abstract
Purpose. To study the inheritance nature and polymorphism of the performance as well as the traits determining it in intervariety hybrids of common bean (Phaseolus vulgaris L.) and to identify promising genotypes and lines for further practical breeding.
 Material and methods. The intraspecies F1–F6 hybrid common bean (Phaseolus vulgaris L.) combinations derived from crosses of varieties of different eco-geographical origin (Mavka/CDC Camino, Belko/CDC Rosalee and Mavka/Niger Wally) were studied. The study object was the performance and suitability for mechanized harvesting as well as traits that determine them. The breeding was conducted according to the full breeding design. We conducted multiple individual selections, starting with F2. We used experimental-field and laboratory-analytical methods and statistical processing of data on a PC.
 Results and discussion. The degree of phenotypic dominance of the plant height in F1 hybrids varied 9.4 to –1.75, of the performance and its constituents – 2.7 to – 1.5. The frequency of probable transgressions in F2 was within 16.5–32.0 and 0–14.7%, respectively, with a coefficient of variation ranging 17.5% to 61.9%. The index traits were less variable. In the F3 Mavka/CDC Camino the share of performance-positive transgressions was 50.0%; in the F3 Belko/CDC Rosalee it was 12.0% related to the number of transgressive forms in F2. In the F4 Mavka/CDC Camino, it increased to 66.1%. 57.1% of the F5–F6 breeding lines gave higher yields than that from check variety Pervomaiska. In 64.3% of the breeding lines, the yield stability exceeded 70%; 39.2% of the accessions were better (81.4–97.1%) than the check variety (76.5%).
 Conclusions. Intravariety hybridization was proved to be an effective method for the crop breeding. It is recommended to select idiotypes from hybrid populations from crossing forms have contrasting traits, starting with F3; it is advisable to use the harvest index as a selection criterion
Highlights
In cannabis breeding, a number of techniques have been developed
For 30 years of intensive work of the National Center for Genetic Resources of Plants of Ukraine, divers and original staring material of lentil has been collected and studied; sources of valuable economic characteristics have been identified for breeding programs of research institutions of Ukraine and other countries
The results of studying the performance and traits that determine it in intervariety hybrid populations of common bean (Phaseolus vulgaris L.) grown in the northern forest-steppe of Ukraine are presented
Summary
Our objective was to evaluate the collection for the traits that determine ease of production and to offer starting material for breeding
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