To enhance the blast resistance of the thermo-sensitive genic male sterile rice line（TGMS）Lun1S, the rice cultivar Gumei4, which carrying the broad?spectrum and durable blast resistance gene Pigm, was employed as the donor parent, and the co?dominant functional marker M143104 of the Pigm gene was used for molecular marker?assisted selection breeding. M143104 amplified a 215?bp fragment from Gumei4 genome, while a 288?bp product was amplified from the genome of Lun1S, showing stable and clear polymorphism. Through successive backcross breeding, five blast-resistant TGMS lines, Lun1S?Pigm, was developed. Field nursery and indoor inoculation assays demonstrated that Lun1S was highly susceptible to seedling blast, whereas Gumei4 and Lun1S?Pigm exhibited high resistance. Investigations of field sterility traits and agronomic yield characteristics were implemented in 2024 and 2025, and one of these improved TGMS lines,Lun1S?Pigm?5, showed excellent comprehensive agronomic and sterile traits: the sowing to heading duration was 81?days, plant height was 74.2–77.7?cm, single plant effective panicles was 7.9–10.4, main panicle length was 22.1–22.5?cm, single panicle spikelets was 407.6–420.0, total stigma exsertion rate was 36.7–38.2%, and neck?panicle enclosure rate was 12.6–14.1%. And Lun1S?Pigm?5 showed stable sterility trait with an approximately 23?°C fertility?transfer critical temperature. This work lays a foundation for breeding super hybrid rice with high-level blast resistance.