FEATURES OF SEED FORMATION IN DOUBLE HAPLOID LINES OF BROCCOLI IN DIFFERENT GENERATIONS

Abstract

The biotechnological methods enable to produce the ‘pure’ lines for the short period of time that intensify the breeding program. Particularly, the anther culture is widely used to obtain double haploid lines (DH lines) in plant breeding. The technology advantage is to fast up essentially the selection of homozygous lines with different morphological traits and high level of uniformity. Contemporary breeding programs are directed at F1 hybrid development; therefore DH lines are in need to serve as the parental form for heterotic hybrid production. Nevertheless, previous data has shown that DH plants have been noticed to produce few seeds on them. To introduce the lines into breeding program for hybrid production and to multiply them, the seed formation of DH lines is worth being studied. The result of assessment of seed generation of DH lines of Broccoli that have been produced from ‘Tonus’ and convariety ‘N1’ is presented in the article There is much difference in morphological traits and both ability to recognize their own pollen and quantity of seeds in the pod among plants produced. Nine DH lines of early maturity were obtained. The differences in seed formation among these lines and between generations were revealed. It was shown the influence of genotype on seed formation in DH lines. It was also noticed the much seed formation in case of geitonogamic pollination in DH lines obtained from cultivar ‘Tonus’. The biological features of flowering in DH lines under conditions of climatic chambers have been studied.