Abstract only

Western Siberia is one of the leading country regions for production of high quality wheat. However, the regional yield significantly varies by years due to frequent droughts and epidemics of fungal diseases in wet years. The numerous data suggest spring wheat yield losses of up 20?30% during leaf rust epidemics. The stem rust has being observed in Western Siberia for the last 3?4 years. In 2009, the wheat yield losses were 25-30% in the fields of Omsk region. Shuttle breeding effectively solves the matters of adoptive and ecological trends in wheat breeding with the help of involvement new sources of valuable Biological and Economical features as initial material from the world's gene pool. Annually 200?1000 lines and hybrid populations of spring bread wheat in Siberian shuttle breeding nursery (SSBN), created according to the shuttle breeding program between scientific institutions of Western Siberia, Kazakhstan and the International Maize and Wheat Improvement Centre CIMMYT, are studied. The local varieties adapted to region conditions were crossed with sources of resistance to leaf and stem rust from CIMMYT collection, and at their basis a resistant initial material for wheat breeding in conditions of Western Siberia was created. The breeding evaluation of the initial material and isogenic lines for resistance to leaf and stem rust in Mexico, Kenya and Western Siberia was performed. The most competitive hybrid populations of spring bread wheat that are resistant to a wide range of races of stem and leaf rust, including a virulent race Ug99, which can be used in different regions in the case of the global spreading of stem rust, were selected.

Text in English

CIMMYT Staff Publications Collection