Abstract
R917, a japonica rice mutant with broad-spectrum resistance to blast, was isolated from an irradiated population. It was resistant to 136 of 138 isolates collected from different regions in China. The mutant showed a single dominant gene for resistance to races ZB13, ZC15, and ZE3, and was nonallelic to genes present in Chengte 232 and Xiushui 37. After inoculation with seven Japanese differential strains, R917 showed the same reaction pattern as Toride 1 and differed from the other differential varieties. An allelism test indicated that the resistance genes between R917 and Toride 1 were nonallelic to Chinese races ZC15 and ZE3. R917 was a semidwarf with strong stem, narrow and erect leaf, and monogenic broad-spectrum resistance to blast. Several lines newly bred using R917 as a donor of blast resistance had the same broad-spectrum resistance to blast as R917 and desirable agronomic traits, indicating no linkage drag between the resistance gene and other important agronomic traits. Recently, R917 has been used as a donor in many rice breeding programs in China.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
