Breeding of rice high-outcrossing-rate photo-thermo-sensitive sterile line and production method of rice seeds

Abstract

The invention discloses breeding of a rice high-outcrossing-rate photo-thermo sensitive sterile line and a production method of rice seeds. The breeding of the rice high-outcrossing-rate photo-thermo-sensitive sterile line and the production method of the rice seeds are characterized in that progeny sterile plants of photo-thermo-sensitive sterile lines Y58S and C815S with low starting point temperature and good comprehensive agronomic traits and three-cross progeny sterile plants of the Y58S, lasting rice blast resistant varieties Mowanggu and Guangzhan 63S are subjected to sexual hybridization to breed the rice high-outcrossing-rate photo-thermo-sensitive sterile line "ton S" and rice variety seeds produced by "ton S". The rice high-outcrossing-rate photo-thermo-sensitive sterile line 'ton S' is a new rice variety which has the advantages of low starting point temperature, excellent plant leaf form, high outcrossing rate, strong high-temperature resistance and strong rice blast resistance, and integrates low production cost, high yield, stable yield, disease resistance and stress resistance into a whole.

Description

technical field [0001] The invention relates to the technical field of breeding of new plant varieties, in particular to a method for breeding a photothermo-sensitive male sterile line with high outcrossing seed setting rate (referred to as "high outcrossing rate") of rice and a method for producing seeds thereof. Background technique [0002] Rice is one of the most important food crops in my country and even in the world, and more than 60% of the population uses rice as a staple food. Since the 1970s, the development of hybrid rice breeding has gone through three stages: three-line, two-line and super rice. The level of heterosis utilization has been continuously improved, and the average yield per mu of 100-mu demonstration plots has exceeded 1,000 kg. Through the large-scale promotion of improved hybrid rice varieties, the yield per unit area of ​​rice in my country has been greatly improved, and it has made a great contribution to food security. However, in recent year...

AI Technical Summary

Problems solved by technology

However, in recent years, the rural farming system has undergone major changes. The large-scale and intensive planting of hybrid rice has developed rapidly, and the amount of seed used per unit area has increased, so the cost of using seed has increased; Influenced by the influence of the existing CMS genetic resources, the yield of seed production is low, resulting in relatively high cost of seed production