Genetic Improvement of Japonica Rice Variety Wuyujing 3 for Stripe Disease Resistance and Eating Quality by Pyramiding Stv-bi and Wx-mq

• Published in: Rice science Vol. 23; no. 2; pp. 69 - 77
• Main Authors: Tao, Chen, Hao, Wu, Ya-dong, Zhang, Zhen, Zhu, Qi-yong, Zhao, Li-hui, Zhou, Shu, Yao, Ling, Zhao, Xin, Yu, Chun-fang, Zhao, Cai-lin, Wang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2016; Institute of Food Crops,Jiangsu Academy of Agricultural Sciences,Jiangsu High Quality Rice R&D Center/Nanjing Branch of China National Center for Rice Improvement,Nanjing 210014,China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou University,Yangzhou 225009,China%Institute of Food Crops,Jiangsu Academy of Agricultural Sciences,Jiangsu High Quality Rice R&D Center/Nanjing Branch of China National Center for Rice Improvement,Nanjing 210014,China; Elsevier
• Subjects: agronomic traits; backcrossing; disease resistance; eating quality; food quality; genetic improvement; genetic markers; homozygosity; marker-assisted pyramiding selection; resistance genes; rice; stripe disease resistance; 低直链淀粉含量; 抗性基因; 武育粳3号; 水稻品种; 水稻条纹叶枯病; 综合性能评价; 遗传改良; 食用品质; stripe disease resistance; marker-assisted pyramiding selection; genetic improvement; rice; eating quality
• ISSN: 1672-6308; 1876-4762
• DOI: 10.1016/j.rsci.2016.02.002

Japonica rice variety Kanto 194 as the donor of resistance gene Stv-b^i and Iow-amylose content gene Wx-mq was used to improve the resistance and eating quality of Wuyujing 3 by the breeding strategy of backcross. In continuous backcross and selfcross generations, the related molecular markers with Stvobi and Wx-mq genes were utilized for genotypic detection by associated with resistance identification of rice stripe disease and agronomic traits selection. Finally, 10 improved lines with homozygous genotype Stv-b^i Stv-b^iWx-mqWx-mq were obtained from BC3F4 generation. The results of comparative analysis indicated that most characters of these lines were consistent with those of recipient parent Wuyujing 3, except for the improved resistance, appearance and eating quality. By evaluation of the comprehensive performance of them, two excellent lines K01 and K04 were selected for further experiments.