Breeding method of high-stress resistance elongated upper internode two-line genic male sterile line

The invention discloses a breeding method of a high-stress resistance elongated upper internode two-line genic male sterile line and belongs to the technical field of the rice breeding for stress resistance. The method is characterized in that a drought-resistant variety Lvhan No.1, a hardy variety Dongye No.1 and a saline-alkaline tolerance variety Dongdao No.4 are taken as resistant resource parents and elongated upper internode two-line genic male sterile lines Fu eS1 and Guangzhan 63eS are taken as recurrent parents, the resistant source genes of the three rice resistance properties are pyramided into an elongated upper internode two-line genic male sterile line material by use of a cross-backcross pyramiding method, and consequently, the elongated upper internode two-line genic male sterile line which is highly consistent with the recurrent parent of the elongated upper internode two-line genic male sterile line in agronomic traits, sterile period conversion temperatures and sterility and has high resistance can be bred through mufti-generation backcross and screening; and the high-resistance elongated upper internode two-line genic male sterile line is used for producing two-line hybrid rice and the resistance level of the hybrid rice can be increased.