Development and study of new spring wheat lines containing alien genetic material from Th. intermedium and Ae. speltoides

Abstract

This paper presents the results of the introduction of leaf rust resistance genes inherited from Th. intermedium and Ae. speltoides into the genome of spring wheat cultivars differing in the length of the vegetation period. A total of 409 F 4 families from cross combinations with the early ripening cultivar Novosibirskaya 15, mid-early 'Novosibirskaya 31' , mid-ripening 'Udacha' and mid-late 'Sibirskaya 17' and the donors of Lr resistance genes 'Tulaikovskaya 10' and 'Chelyaba 75' were studied for leaf rust resistance and the duration of vegetation period. A significant reduction in heading date was revealed in the F 4 lines obtained on the base of the mid-late variety Sibirskaya 17. In contrast, the lines originating from of the 'Udacha' × 'Chelyaba 75' and 'Novosibirskaya 15' × 'Tulaikovskaya 10' crosses were characterized by an elongated period from germination to ear emergence. According to the results of molecular and phytopathological testing, breeding lines were selected that differ in pathogen resistance, length of vegetation period and productivity.