Peculiarities of structure and development of female generative structures in corn lines with heritable and nonheritable types of parthenogenesis

The cytoembryological analysis data of corn lines with the inherited parthenogenesis with different types of cytoplasm (AT-3 (N), AT-3 (M), AT-3 (S), AT-3 (T), AT-3 (V)) and the haploid inducer lines with non-inherited parthenogenesis (ZMS-P1, ZMS-P2, ZMS-P3) are given in the article. It is found that the AT-3 (N), AT-3 (M), AT-3 (S), AT-3 (T), AT-3 (V) corn lines are characterized both parthenogenetic embryos development (2.3-5%) and the formation of additional egg cells in the embryo sacs (0.3-10%). These gametophyte anomalies can be used as diagnostic features in the search and selection of new parthenogenetic forms in corn. In the ZMS-P1, ZMS-P2, ZMS-P3 lines in the unfertilized embryo sacs the egg cells parthenogenetic development was not detected. In the plant of the ZMS-P1 and ZMS-P3 lines the gametophytic anomalies (additional egg cells and additional polar nuclei) were recorded in the single embryo sacs. In the ZMS-P2 line anomalies were absent.