Method for rapidly producing original seeds of rice photo-and-temperature-sensitive sterile line

Abstract

The invention discloses a method for rapidly producing original seeds of a rice photo-and-temperature-sensitive sterile line. According to the method, the production life can be shortened, the production speed of the original seeds is increased, and the original seeds of the rice temperature-sensitive sterile line can be produced only through two-season production identification in different regions of a year. The agronomic traits of the sterile line can be rapidly stabilized and the consistency of sterile starting point temperatures can be maintained to obtain original seeds of plant line generations of the rice photo-and-temperature-sensitive sterile line with typical traits and agronomic traits and uniform and consistent sterile starting point temperatures.

Description

technical field [0001] The present application relates to the technical field of hybrid rice seed production, in particular to a method for rapidly producing original rice photothermo-sensitive male sterile lines. Background technique [0002] In the 1990s, two-line hybrid rice was successfully developed, which further improved the yield and quality of rice. The two-line method hybrid rice is a hybrid rice selected from the rice photothermosensitive male sterile line by using the rice photothermosensitive male sterile gene. The male sterility of the rice photothermosensitive sterile line is controlled by the ambient temperature and light, and has Fertility conversion characteristics play the role of "one line with two uses", that is, male sterility under high temperature and long day conditions, hybrid seed production, and hybrid seed production; under low temperature and short day conditions, male fertility is achieved, realizing reproduce itself. [0003] Since the male ...

AI Technical Summary

Problems solved by technology

[0003] Since the male sterility threshold temperature of rice photothermo-sensitive sterile lines has the characteristics of "genetic drift", that is, with the increase of reproductive generations of sterile lines, the sterile threshold temperature will increase with the increase of generations, so the temperature In the production process of the original seed of the sensitive male sterile line, it is necessary to maintain the typical agronomic traits of the male sterile line and the uniformity of the characters, and to maintain the stability of the starting point temperature of the sterile line, which is more complicated than the production of other parental original seeds of hybrid rice.

At present, according to the original seed production technology of photothermosensitive male sterile line of rice, the production of plant row generation original seed needs to go through two generations of production in seed selection nursery and plant row nursery to obtain seeds. The time is long and the progress is slow, which is not conducive to seed industry enterprises. Accelerate the process of marketization of new varieties