Method of female sterile gene FST for hybrid rice breeding

Abstract

The invention relates to a method of female sterile gene FST for hybrid rice breeding, belonging to the breeding field in the technical field of agricultural biology. The technical scheme is as follows: male sterile lines are propagated according to a three-line or two-line method in a programming manner; the propagation of rice female sterile line can be completed by adopting asexual propagationmode of perennial roots, or two-purpose transgenic female sterile line expressed by culturing conditions leads the female fertility to be restored by artificial adjustment and control of FST gene expression so as to complete self propagation; and when in producing seeds, the male sterile system and the female sterile line are planted in the same filed, a pollen receptor is male sterile line, a pollen donor is female sterile line, the pollen of the female sterile line is conferred to the male sterile line and the harvested seed is hybrid seed. The method simultaneously utilizes male sterile (MS) and female sterile (FS) to construct seed producing modes of 'MS+FS', is suitable for mechanized operation, avoids mechanical mixing of a restorer and can accelerate the promotion and application process of hybrid rice.

Description

technical field [0001] The invention relates to a method for using female sterility gene FST in hybrid rice breeding, which belongs to the field of agricultural biotechnology, and more specifically belongs to the field of crop breeding. Background technique [0002] Rice is the second largest cereal crop in the world, and nearly 50% of the global population depends on it as the main source of nutrition. Although in rice breeding, the discovery and utilization of the dwarf gene and cytoplasmic male sterility gene in the 1950s and 1970s has greatly increased the per unit and total yield of rice in the world, and solved the problem of food and clothing for a considerable number of people. However, in the past 40 years, the rapid growth of the global population is also a problem that cannot be ignored. Since the 1970s, the growth rate of global rice production has not been as fast as the population growth rate. Since 2002, the consumption has exceeded the production and the inve...

AI Technical Summary

Problems solved by technology

However, in the United States and other countries where the degree of mechanization is high and the artificial breeding system is replaced by machine operation, the mixing of maintainer and restorer lines is more serious.

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