New inbred lines of maize as carriers of valuable traits inherited at inbreeding

Abstract

The results of the study of breeding value 22 new inbred maize lines diverse on genetic base, whose pedigrees were five synthetics from Australia, three ones from the United States , one of Ukraine, a hybrid from Thailand and one variety from USA, which are registered in the National Centre for Plant Genetic Resources of Ukraine. In order to more completely and detailed study inheritance of a traits of source material, inbred families of different generations were sown, in which was determined the degree of depression. It permitted to select a valuable lines characterized by a high display level of a number signs. In 2012, in the phase of 4-5 leaves, there were cooler temperatures at night, what made it possible to conduct scoring of the lines on cold resistance using degree of anthocyanin coloration of plants. The most cold-resistant were the lines created on the base of the U.S. germplasm. Inbred lines of maize with a high level of grain number per ear and productivity and increased grain size manifestation were revealed: UHK 512 UHK 550 UHK 551, 571 UHK and others. The characteristics of the inbred progenies and sister lines originated from BS 17 Syn for plant productivity, grain number per ear and weight of 1000 grains. 10 high-productive lines that are able to rapidly accumulate dry matter in the grains were selected from germplasms of Australian and American origin. The best of them were lines from the initial forms BS 17 Syn and Asgrow 3082.