Breeding Achievement Analysis of Novel Wheat-Agropyron cristatum Germplasm Sister Lines Pubing 2011

DU Li-yuan;LIU Wei-hua;YANG Xin-ming;LI Xiu-quan;LI Li-hui;National Key Facility of Crop Gene Resources and Genetic Improvement,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences;

wheat-Agropyron cristatum;;distant hybridization;;novel germplasm;;sister lines

Wide cross between common wheat and wild relative is an important way for wheat improvement. A number of sister lines were usually acquired during selection of stable novel germplasm from wide cross. To utilize these sister lines in future works is based on the phenotype and genotype of important agronomic traits. In this study,205 sister lines Pubing2011 derived from the wide cross of wheat-Agropyron cristatum were used for comprehensive evaluation and genotype analysis of important agronomic traits. The results showed that 205 sister lines were very similar in genetic background,with the genetic similarity coefficient in the range of 0. 985- 0. 999. Meanwhile,the coefficient of variation of 15 different traits ranged from 0. 54% to 20. 21%. All of 205 lines conferred adult-plant resistance to powdery mildew,and 204 lines conferred adult-plant resistance to stripe rust and two lines conferred seedling resistance to stripe rust. Total 112 sister lines carried high protein quality subunits 5 + 10,including 4 lines with both 2 * and 5 + 10. The composition of vernalization genes of Pubing2011-2 was( vrn-A1,vrnB1,Vrn-D1,and vrn-B3),the others were( vrn-A1,vrn-B1,vrn-D1,and vrn-B3),and the photoperiod gene at the Ppd-D1 locus of the 205 lines was Ppd-D1 a with non-sensitive character. Phenotype analysis suggested that three lines possessed high yield potential and seven lines carried high protein quality,high yield potential and resistanceto pathogen. These lines could be used as excellent parents for future wheat breeding.