Assessment of significant for breeding morphological traits in the double haploid population of Brassica rapa L. in controlled conditions of a regulated agroecosystem

Relevance. The genus Brassica includes the most important vegetable, oilseed, spice and forage crops. Many representatives of cabbage are widely used as model objects for studying economicaly valuable traits. Limited publications devoted to the study of genetic aspects of the implementation of morphological quantitative features of B. rapa and the lack of data on the influence of environmental parameters on their implementation make it a very urgent task to study these features in the RAES. Material and methods. The purpose of this work is to study the influence of environmental light factors on the manifestation of economically valuable features in the mapping populations of B. rapa in the RAES. The peculiarity of our research is the study of lines of mapping populations of B. rapa in strictly controlled conditions of the RAES. The studied populations were grown under optimal conditions with a 12-hour photoperiod. 21 DH 30 lines and 31 DH 38 lines were used. Several types of economically valuable traits were studied: the timing of transition to flowering, the growth rate of the plant, the habit and morphological characteristics of the leaf and leaf rosette. Results. A high degree of variation in the expression of the studied traits between lines within the population was revealed, which is consistent with previously published data [1, 2]. Highly productive genotypes, which can be used in further genetic selection work, including for obtaining genotypes, ines, and varieties adapted for growing in light culture, have been selected. The obtained data can also be used for further study of the influence of physical environmental factors on the manifestation of selectively significant quantitative traits in cabbage plants.