Breeding method of sterile line of three-line hybrid rice

Abstract

The invention discloses a breeding method for transferring a sterile line of three-line hybrid rice by using a Basmati fragrant rice material. According to the method, excellent germplasm resources in the South Asia region are introduced, planting in different regions and different seasons is conducted, tracking improvement is insisted, and the material Pusa derived from an Indian Basmati fragrant rice group is discovered to have good field plant leaf form, good quality, high resistance and certain holding capacity for a wild abortive type sterile line; through continuous multi-generation system selection, a method for searching individual genotype difference from groups is adopted, the screening pressure on large segregation groups is increased, minor restoring genes are eliminated by generations over 8 years, a high-quality maintainer line material Pusa167-12 is identified from the fragrant rice resources in combination with rice quality early-generation screening and taste evaluation, and through continuous pairing backcross with Zhenshan 97A, a high-quality fragrant sterile line Zhongzhe A which has new plant type, good resistance and quality up to ministerial high-quality rice Class 1-2 standards is successfully transferred.

Description

technical field [0001] The invention belongs to the technical field of hybrid rice breeding, and in particular relates to a method for breeding a sterile line of three-line hybrid rice. Background technique [0002] In recent years, with the development of rice production and the improvement of people's living standards, the problem of rice quality has increasingly attracted people's attention. Improving the quality of rice is an important task before us. According to my country's high-quality rice standards, the rice quality problems of the current three-line hybrid rice are mainly manifested in low polished rice rate, high chalky grain rate, high chalkiness, low gel consistency, and poor eating quality, so it lacks competitiveness in the market . A large number of studies have shown that the main reason affecting the quality of hybrid rice is the poor quality of male sterile lines. At present, most of the three-line hybrid rice in my country is prepared by using the three...

AI Technical Summary

Problems solved by technology

[0007] The present invention makes improvements to the above-mentioned existing problems, that is, the purpose of the present invention is to provide a method for breeding male sterile lines of three-line hybrid rice. Technical problems, and then broaden the breeding range of maintainer lines and enrich the genetic background of sterile lines, and finally select high-quality sterile lines with excellent rice quality, good comprehensive traits, especially applicable to production

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