Improvement of Stable Restorer Lines for Blast Resistance through Functional Marker in Rice (Oryza sativa L.).

ABSTRACT: Two popular stable restorer lines, CB 87 R and CB 174 R, were improved for blast resistance through marker-assisted back-cross breeding (MABB). The hybrid rice development program in South India extensively depends on these two restorer lines. However, these restorer lines are highly susceptible to blast disease. To improve the restorer lines for resistance against blasts, we introgressed the broad-spectrum dominant gene Pi54 into these elite restorer lines through two independent crosses. Foreground selection for Pi54 was done by using gene-specific functional marker, Pi54 MAS, at each back-cross generation. Back-crossing was continued until BC3 and background analysis with seventy polymorphic SSRs covering all the twelve chromosomes to recover the maximum recurrent parent genome was done

SUBMITTER: Ramalingam J 

PROVIDER: S-EPMC7692511 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature