COMBINING ABILITY OF LINES OF WINTER AND SPRING RAPE IN BREEDING FOR LODGING RESISTANCE

Abstract

The paper presents the results of the experimental research on the evaluation of combining ability of parental lines and F₁ hybrids of winter and spring rape. The common (CCA) and specific (SCA) combining ability is determined; the most valuable genotypes with high indicators of CCA in terms of the plant height and seed productivity are identified. It’s established that 3 lines of winter rape A-6, ON-3, T-4, K-5 and 5 lines of spring rape: C62-67, 87-13, V-10, M-5, 111-4 are distinguished by reliable positive assessments of CCA effects in terms of seed productivity. The lines of winter rape T-4, K-5 and 315-17 and lines of spring rape TZ-7, TT-8, NS-3, I-18 are characterized by negative values of CCA in terms of the height of the plant and branching as well as the lines ТТ-8, NS-3, С62-67, I-18 and 111-4 (height of branching) which are recommended to use in breeding for lodging resistance.