Rice heterosis locus polymerizing method

Abstract

The rice heterosis locus polymerizing method includes the following steps: collecting material; cross-breeding between the acceptor parent and the donor parent; continuous back crossing between the filial generation and the acceptor parent; continuous selfing of back crossing generation; test crossing between the selfing generation and the restoring line of the acceptor parent and comparing test to obtain excellent strain. The present invention has simple experiment process and convenient operation, and can obtain excellent rice strain stably and reliably.

Description

technical field [0001] The present invention relates to the selection and breeding of hybrid rice varieties, and more specifically relates to a method for aggregating rice heterosis loci to breed new super-high-yield rice combinations and new strains. The breeding method belongs to the technical field of plant genetics. Background technique [0002] Rice is the most important food crop in my country, and its sown area and annual output both rank first among all kinds of crops in my country. In the past half century, my country's rice production has achieved two major leaps. The first time was that the breeding and promotion of dwarf varieties in the 1960s and 1970s led to a substantial increase in yield; the second time was the breeding and promotion of hybrid rice in the 1970s and 1980s, which again led to a substantial increase in yield. These two leaps have made great contributions to solving the food and clothing problems of our people. Howe...

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Problems solved by technology

[0003] From the perspective of variety improvement, the following major problems generally exist in my country's rice production: First, the rice output has stagnated in the past two decades. The fundamental reason is that the newly bred varieties do not have great yield potential. breakthrough

Second, the rice quality of the main popularized varieties and hybrid rice in my country is relatively poor, which can neither meet the requirements of the improvement of people's living standards, but also because of the low price affects farmers' enthusiasm for growing grain, and the quality of rice needs to be improved urgently

Third, the large-scale promotion of a small number of varieties has increased the damage of diseases and insect pests year by year. The large amount of pesticides sprayed every year has not only increased the burden on farmers, caused farmers to increase production but not increase income, but also seriously damaged the ecological environment on which human beings depend for survival, and also caused food poisoning. A large amount of pesticide residues, endangering human health

Fourth, the high-yielding varieties currently being promoted require a large amount of fertilizer

Fifth, the shortage of water resources has become a worldwide problem

[0006] However, in the past ten years, the yield potential of hybrid rice has been hovering. Although there are a large number of newly bred varieties, there is no obvious breakthrough in the yield level.

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