Rapid cultivating method for high-yield and high-quality multiple resistant rice restorer

Abstract

The invention relates to a rapid cultivating method for a high-yield and high-quality multiple resistant rice restorer. The method comprises the steps of selecting eight rice species having the characters of high yield, high quality, insect resistance and disease resistance as parents, hybridizing every two parents with different target characters to obtain four first-filial generations F1; hybridizing every two of the four F1 to obtain two composite cross generations F1; performing molecular marker-assisted selection on the two composite cross generations F1 single plants in a seedling stage, screening two composite cross generations F1 integrating target genes, carrying out matched hybrid to obtain multiple composite cross generations F1; performing molecular marker-assisted selection on the multiple composite cross generations F1 single plants in a seedling stage to obtain a single plant integrating all target genes, carrying out anther culture to obtain H0 generation anther-culture lines, screening diploid lines; performing molecular marker-assisted selection, agronomic characters, quality and resistance screening on H1 generations to obtain a target high-yield and high-quality multiple resistant rice restorer, carrying out combined test with a series of two-line sterile lines, and screening out advantageous combination.

Description

technical field [0001] The invention relates to a method for cultivating a rice restorer line, which belongs to the technical field of molecular cell plant breeding, in particular to a method for rapidly cultivating a high-yield, high-quality, multi-resistance rice restorer line, and is particularly suitable for the rapid cultivation of a high-yield, high-quality, and multi-resistance two-line restorer line nurture. Background technique [0002] Rice is one of the most important food crops in the world and is the staple food of more than half of the population in my country. With the continuous increase of the world population, the reduction of the global arable land year by year, the frequent occurrence of natural disasters, and the slowdown of food growth, food security has become a hot issue of general concern to the international community. The perennial planting area of ​​hybrid rice in my country accounts for about half of the rice planting area, and the output exceed...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems of long breeding cycle, high cost, low flower cultivation efficiency, easy to be affected by environmental and human factors, and low cultivation efficiency in the prior art, and to provide a short breeding cycle, Rapid breeding method for high-yielding, high-quality, multi-resistant rice restorer lines with low cost, high flower cultivation efficiency, less susceptible to environmental and human factors, and high cultivation efficiency

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