HomeInternational Rice Research Notesvol. 29 no. 2 (2004)

Development of TGMS lines and two-line rice hybrids through a shuttle breeding program between IRRI and China

Tongmin Mou | Chunhai Li | Junying Xu | S. S. Virmani | D. L. Sanchez

Discipline: Agriculture, Plant Breeding



Based on the discovery of photoperiod-sensitive genic male sterile (PGMS) rice mutant Nongken 58S (Shi 1981), rice scientists in China began work on the two-line system of hybrid rice breeding in the early 1980s. Subsequently, some thermosensitive genic male sterile (TGMS) rice mutants, such as Annong S-1 and 5460S, were developed in 1988 through screening of breeding materials and radiation, respectively (Lu et al 1998). The two-line system was established in China by using PGMS and TGMS lines. This method was considered more efficient than the thre-line system in exploiting heterosis to increase yield.