Identification and Fine Mapping of RppM, a Southern Corn Rust Resistance Gene in Maize.

ABSTRACT: Southern corn rust (SCR) caused by Puccinia polysora Underw. is a major disease causing severe yield losses during maize production. Here, we identified and mapped the SCR resistance gene RppM from the near-isogenic line Kangxiujing2416 (Jing2416K), which harbors RppM in the genetic background of the susceptible inbred line Jing2416. In this study, the inheritance of SCR resistance was investigated in F₂ and F₃ populations derived from a cross between Jing2416K and Jing2416. The observed 3:1 segregation ratio of resistant to susceptible plants indicated that the SCR resistance is controlled by a single dominant gene. Using an F₂ population, we performed bulked segregant analysis (BSA) sequencing and mapped RppM to a 3.69-Mb regio

SUBMITTER: Wang S 

PROVIDER: S-EPMC7363983 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature