The spontaneous mutation of maize endosperm offers a large genetic diversity which gives great possibilities to find important resources and new combinations of genes, in order to improve the quality of maize kernel. Among this wide variability, the waxy-1 (wx1) genes determine only the synthesis of amylopectin fraction from starch in grain. The amylopectin starch, in its turn, is used a lot for: dietetic food and food for children, macaroni, sugar products (glucose, fructose, maltose and glucose – fructose syrup), substitute of blood (oxiethyl starch or valicham), glue production and other branches of modern economy of high developed countries of the world.  The results of our long-term study consist in creation of the new initial material and hybrids of waxy-1 maize with yellow and white grain. This biological material was obtained by using methods as backcross, hybridization, standard with multiple self-pollination and successive selection of promising maize genotypes. Our working collection was represented by more than 175 inbred lines (level S6-S7) of waxy-1 special maize which were, for the first time, systematized in four botanical varieties. Out of them, two new botanical taxa were suggested by us under the names alborubraceratiha, which includes inbred lines with white grain and red rachis, and luteorubraceratina, which includes inbred lines with yellow grain and red rachis (table 1).  Table 1. The varieties of initial material of waxy-1 maize (Zea mays L. subsp. Ceratina)       No.     Variety     Color   Quantity of Inbred lines       % grain rachis 1. 2. 3. 4. Var. alboceratina (Kulesh. et Kozhuch.) Var. luteoceratina (Kulesh. et Kozhuch.) Var. alborubraceratina  (Tsiganas) Var. luteorubraceratina (Tsiganas) white  yellow white yellow white white red red 28 26 40 81 17.1 14.9 24.0 44.0  Total - - 175 100   The majority of the inbred lines belong to the luteorubraceratina variety because the signs of yellow colour of grain and red colour of rachis are controlled by dominant genes of maize plant. As a result of assessing the general combining ability, a lot of lines of wx1 maize, the most valuable ones, were selected. These lines show minimal depressions and basically are homozygous according to plant, ear and grain characteristics. According to biochemical properties, these lines have high starch content, from 70.1% to 73.2%, which consist only of amylopectin, a polymer with branched molecule and superior physical and chemical properties in comparison with amylose from starch. The newly developed lines contribute to increase the genetic diversity of waxy-1 maize, to synthesize competitive hybrids with valuable technological and food features and can be used as initial material for improvement of productivity of waxy-1 maize. Some of these inbred lines came in component of numerous hybrids. At present, five of our single-cross wx1 hybrids were regionalized in the Republic of Moldova, such as: Chisinau 297 wx1;Y, Chisinau 333 wx1;Y, Chisinau 403 wx1;Y, Stalker (regionalized in Ukraine, was created in collaboration with Ukrainian breeders) wall with yellow grain and Chisinau 297 wx1;y with white grain. Now, there is at State Plant Testing of RM a new single-cross wx1 hybrid with white grain named Chisinau 335 wx1;y. The wx1 hybrids represent the main source of amylopectin starch as raw material for industry. Also, the inbred lines and hybrids of waxy-1 maize may be used in diverse scientific research programs on breeding and genetics in order to improve the quality of maize grain in our country and abroad.