Inheritance of Special Productivity Characters by Hybrids F1 of Spring Triticale in the Conditions of the Vladimir Region

The main method of breeding spring hexaploid Triticale is variety hybridization. At the same time, the effectiveness of breeding work depends on the correct selection of parental forms for crosses. However, the parental forms show different combining abilities according to selective characteristics. In this regard, the selection is more effective if it is based on information about their inheritance obtained through genetic analysis. The purpose of the research is to study the nature of inheritance of the main characteristics of productivity of the main ear (number of spikelets per ear, number of grains per ear, weight of grain per ear, weight of 1000 grains) hybrids of spring triticale F1 in agroecological conditions of the Vladimir region. The material of the study was 20 reciprocal hybrid combinations of spring triticale in comparison with the parental forms. To create hybrids of the first generation, four varieties of domestic selection and one Belarusian with high indicators of economically valuable traits were involved in hybridization. A different degree of phenotypic dominance has been established, which determines the type of inheritance of quantitative signs of productivity of the main ear. Reciprocal F1 hybrids differed in the degree of dominance from depression (negative overdominance) to heterosis (positive overdominance). The heterosis effect depended on which parental form was taken for the material, and which for the paternal. Hybrid F1 combinations with a high degree of overdominance of the main characteristics of the productivity of the main ear are identified: Lotas × Norman, Norman × Lotas, Norman × Grebeschok, Amigo × Grebeschok, Amigo × Norman.