Breeding method of three-line indica rice male sterile line of wild beating type

Abstract

The present invention provides a method for breeding wild rot type three-line indica rice sterile line. Firstly, intermediate indica rice germplasm is selected, and then the intermediate indica rice germplasm is crossed with the maintainer line "Yuefeng B" to obtain a new maintainer line germplasm, and then The new germplasm of the maintainer line was crossed with "Shengshi A" to obtain a hybrid germplasm, and finally the hybrid germplasm was backcrossed with the new germplasm of the maintainer line to obtain a backcross sterile line germplasm, and further backcrossed to breed stable sterile Department of germplasm. The invention has the advantages and beneficial effects of being able to obtain indica rice sterile lines with excellent rice quality, strong stress resistance, good combining ability, good outcrossing habit, and large-scale application in production, and good plant and leaf form when compounding and combining , strong tillering ability, more effective ears, tidy heading, good grain filling and color fading, good resistance, high rice quality and high yield.

Description

technical field [0001] The invention relates to the field of hybrid rice breeding, in particular to a method for breeding male sterile lines of indica rice. Background technique [0002] Three-line hybrid rice is a great achievement of rice breeding and promotion. The so-called three-line is: (1) male sterile line: the pistil is normally developed, and the development of the stamen is degraded or aborted, and self-pollination cannot bear fruit; (2) keep Line: the pistil of the male sterile line develops normally, its pollen is given to the pistil of the male sterile line, not only can form seeds, but also can still obtain male sterile plants after sowing; (3) restorer line: its pollen is given to the pistil of the sterile line, After the resulting seeds are sown, the grown plants regain their fertility. [0003] In the three-line hybrid rice breeding technology system, rice cytoplasmic male sterile line breeding and male sterile restorer line breeding are the most basic and...

AI Technical Summary

Problems solved by technology

The second type is the rice red lotus cytoplasm. The maintainer line of this cytoplasmic sterile line is different from the wild type, and the restorer line is also different from the wild type. The above belongs to gametophyte sterile, the pollen is mainly circular abortion, a small amount of fertile pollen will be formed in high temperature climate, the fertility stability of the sterile line is relatively poor

However, there are few early-maturing, high-quality, and high-yielding sterile lines in hybrid rice breeding, and it is difficult to apply them in large-scale production.

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