Creation the genetic marked corn lines with heritable and nonheritable types of haploid parthenogenesis

Haploid plants are a valuable starting material for breeding and the object of theoretical research in the field of reproductive biology. The spontaneous frequency of haploid development is very low (0.01-0.1%), therefore the creation of lines with increased matroclinal haploidy frequency is important. A new genetic marked corn lines with different types of haploid parthenogenesis were obtained. ATTM lines with heritable type of haploidy, marked by different genes combinations ( y1 and bm2 as well as y1, bm2 and lg1 ) are characterized by a high frequency of parthenogenetic proembryo development (up to 6%). The recessive genes y1 (yellow endosperm), bm2 (brown midrib) lg1 (liguleless leaf) are used as markers. The new haploid induced line ZMS-P with nonheritable type of haploidy is marked by dominant genes, controlling the purple color of embryo, endosperm and vegetative organs of the adult plant. Its usage as the pollinator gives haploids frequency in progeny up to 10%.