STUDY OF SPRING SOFT WHEAT BREEDING LINES UNDER CONDITIONS OF TUVA
Adaptation and productive qualities of 44 breeding lines of spring soft wheat, bred at the N.I. Vavilov Research Institute of Plant Industry and Siberian Research Institute of Plant Growing and Selection, were studied under natural-climatic conditions of the Republic of Tuva. Based on 3-year investigations carried out in the collection nursery were selected breeding lines resistant to drought and characterized by good potential productivity and early ripeness: Altaiskaya 92 ґ Kantegirskaya 89, Skala BR ґ Kantegirskaya 89, Chagytai ґ Irtyshanka 10, Chagytai ґ 38/1, and GK-276 ґ Novosibirskaya 29. It was found that the breeding lines Altaiskaya 92 ґ Kantegirskaya 89, Skala BR ґ Kantegirskaya 89, Chagytai ґ Irtyshanka 10, Chagytai ґ 38/1 under conditions of the pronounced continental climate of the Republic positively combined thousand-kernel weight and high grain content. The Chagytai cultivar has high combining ability, when crossed, and transfers positive traits, the number of productive stems, thousand-kernel weight, and the number of spikelets per ear.