Method for improving American glabrous rice and japonica rice germplasm

Abstract

The invention relates to a method for improving American glabrous rice and japonica rice germplasm. The method includes: hybridizing American glabrous rice germplasm with a high-yield variety on the lower reaches of Yangtze River. Through ideotype construction, high-fecundity seed selection technology, high-yield community optimization technology, glabrous rice leaf selection technology and glabrous rice ear selection technology, the problem that American glabrous rice is poor in fecundity, prone to premature senility in later period and low in yielding ability in regions on the lower reaches of the Yangtze River can be effectively solved, own excellent characteristics of glabrous rice like high rice quality, high fertilizer tolerance and lodging resistance, high ear-bearing rate, high adaptability to high light intensity, temperature insensitiveness of rice quality and rice glume glabrousness are maintained, effective polymerization of excellent gene and high-yield gene of the glabrous rice is realized, adaptability level of new varieties is improved, and vitality of bred new varieties is improved.

Description

technical field [0001] The invention belongs to the field of rice planting, and in particular relates to an improvement method for planting naked rice in the United States. Background technique [0002] Light-skinned rice, also known as "light-leaf rice" and "light-hull rice", is famous for its smooth and hairless leaves, stems, leaf sheaths and grains. It is mainly distributed in Africa, America and my country's Yunnan-Guizhou Plateau It is the main type of plant species in the United States, Africa and other places. There are different viewpoints on the taxonomic status of Oryza sativa. Some people regard it as a higher-level group above the glazed japonica, and it is juxtaposed with the species with scale hair; some people put it in the Java rice, which is the same ecotype as the Java rice; Oryza sativa (Oryza glabra) is listed as an ecogroup as a subspecies of Hominus and as an ecotype of japonica rice. Regardless of the taxonomic status of Oryza naked, as an important...

AI Technical Summary

Problems solved by technology

However, American naked rice has technical problems such as poor adaptability and low yield in the lower reaches of the Yangtze River, and there are no reports of large-scale application of naked rice varieties in other areas of the lower reaches of the Yangtze River. Therefore, it is urgent to provide a new method for the lower reaches of the Yangtze River. japonica rice types, enhancing the market competitiveness of rice in the region