Utilization of 1BL/1RS translocation in wheat breeding in China

Abstract

In total , 179 predominant cultivars in recent 30 years and new breeder’s lines from main ecological zones of China were examined by SDS2PAGE and SCAR for the presence of 1BL/ 1RS. On average , 38 % of Chinese wheats released since 1980 contained 1BL/ 1RS , however , its frequency differed in different ecological zones , which was 59 % for Northern Winter Wheat Zone , 42 % for Yellow2Huai River Valley Winter Wheat Zone and 20 % for both Middle and Low Valley of Yangtze River Winter Wheat Zone and Southwest Winter Wheat Zone. No 1BL/ 1RS cultivars were found in Northeast Spring Wheat Zone. The cultivars with high dough elasticity were generally not 1BL/ 1RS translocations. High molecular weight glutenin subunits ( HMW2GS) may have some complementary effects on the quality defects caused by 1BL/ 1RS. From breeding point of view , 1BL/ 1RS parents are generally not recommended in breeding for medium to high dough elas2 ticity , or one of the parents at least should not be 1BL/ 1RS. Good combination of HMW2GS sho ld be presented when 1BL/ RS parent is used. The quality defects of 1BL/ 1RS should also be considered in soft wheat breeding.