*2.1. Mapping Population*

The *P. capsici*-susceptible sweet pepper line "1287" was obtained from Zhongjiao808, whereas the *P. capsici*-resistant "PI201234" was collected from Central America. The present study used an F2 mapping population, comprising 150 individuals that were obtained by crossing female parent 1287 and male parent PI201234, which was then used as mapping population. The parental lines and the F2 population were grown at the Chongqing experimental station of the Chongqing Academy of Agricultural Sciences (Chongqing, China). Sowing of pepper seeds was performed using 50-cell trays containing a mixture of peat and vermiculite that was autoclave sterilized for 30 min in 2018.
