Method for breeding half-bending heavy-panicle large-grain type japonica rice

Abstract

The invention relates to a method for breeding half-bending heavy-panicle large-grain type japonica rice. The method comprises implementation steps of (I) establishing the property standard of the half-bending heavy-panicle large-grain type japonica rice; (II) performing introduction, evaluation, screening and utilization of variety resources; (III) performing breeding of bending heavy-panicle type superior-stress-tolerance high-yield varieties and half-bending panicle type superior-stress-tolerance high-yield varieties; (IV) performing breeding of bending heavy-panicle large-grain type superior-stress-tolerance high-yield varieties; and (V) performing breeding of half-bending heavy-panicle large-grain type superior-stress-tolerance extra-high-yield varieties. Through the adoption of the method disclosed by the invention, the bred varieties concurrently have double advantages of erect-panicle type varieties and bending-panicle type varieties, comprehensive stress tolerance polymerization is realized, breeding objectives of being superior, tolerant to stress and extra-high in yield are achieved, the selection efficiency and the probability of directionally breeding objective traitsare greatly improved, and the application effects are quite significant.

Description

technical field [0001] The invention relates to a method for selecting and breeding japonica rice, in particular to a method for selecting and breeding semi-curved double-pane and large-grain japonica rice. Background technique [0002] As we all know, rice breeding in my country has been in the leading position in the world for a long time. The national rice production has gone from more than 100 kilograms per unit area in the early days of liberation to about 500 kilograms at present. three breakthroughs. The utilization of heterosis is mainly applied in indica rice producing areas in the south, while the yield breakthrough in northern japonica rice producing areas is mainly due to the innovation and application of the ideal plant type---upright panicle breeding theory. The erect panicle varieties have strong ventilation and light transmission, lodging resistance, and high yield. However, the general defects of erect panicle varieties are poor eating quality and poor consu...

AI Technical Summary

Problems solved by technology

[0004] Affected by global warming, rice pests and diseases in the south of my country have a clear upward trend. For example, the stripe leaf blight and rice planthoppers that broke out in the northern japonica rice region in the early 21st century caused huge losses to rice production.

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