Breeding method for cultivating indica type three-line strong high-quality restoring line in multiple tiller positions

Abstract

The invention discloses a breeding method for cultivating an indica type three-line strong high-quality restoring line in multiple tiller positions. The method comprises the following steps of: (1) selecting one of parents with more than or equal to 18 main stem total leaves, taking the parent as a female parent set, and preparing an Fe generation; (2) selecting an individual plant which has more than or equal to 18 main stem leaves, excellent comprehensive agricultural shape and moderate growth period from an F2 separation generation; and (3) planting the selected individual plant according to the strain, screening from 3-5 generations to obtain a new strain, performing continuous combining ability measurement and leaf age observation in 2-3 years on a stable strain with more than or equal to 18 main stem total leaves by using Zhenshan 97A, and integrating the results to obtain the indica type three-line strong high-quality restoring line. The obtained indica type three-line strong high-quality restoring line has more than or equal to 18 main stem total leaves, multiple tiller positions, high primary tiller rate, early tiller and early germination, a foundation is laid for obtaining full and large ears, the total spikelet number in unit area of the restoring line can be effectively increased, and a guarantee is provided for obtaining high per unit area yield.

Description

technical field [0001] The invention belongs to the technical field of plant variety selection and breeding, and in particular relates to a breeding method for cultivating a medium indica three-line strong and superior restorer line with multiple tiller nodes. Background technique [0002] Rice is the largest food crop in my country. Since the 1970s, Chinese scientists have successfully bred rice nuclear-cytoplasmic male sterile lines and photothermo-sensitive genic male sterile lines, and successfully realized three-line and two-line matching. Hybrid rice combines the improvement of plant morphology with the strong physiological functions of the first generation of hybrids, resulting in strong heterosis. The rapid promotion of hybrid rice has increased the average yield of rice in my country by 20%, making an important contribution to the grain production of my country and the world. contribute. At present, the planting area of ​​hybrid rice in my country accounts for more ...

AI Technical Summary

Problems solved by technology

In the current indica rice seed production, the row ratio of father and mother is generally 2:12~14. When the row ratio exceeds 2:14, the amount of pollen in the male parent will be insufficient, and the seed setting rate of the female parent will decrease, which will not only fail to achieve the purpose of increasing yield, On the contrary, there are different degrees of production reduction

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