Method for breeding new red rice variety by using medicinal wild rice

Abstract

The invention provides a method for breeding a new red rice variety by using medicinal wild rice, and belongs to the technical field of rice breeding. The method for breeding the new red rice variety by using the medicinal wild rice comprises the following steps: introducing DNA of the medicinal wild rice into receptor rice, bagging before flowering of the receptor rice, harvesting seeds after maturation, planting the seeds in the current year, screening after heading to obtain excellent single plants, and subsequently planting twice every year, early planting is excellent single plants obtained by screening of late planting in the last year, late planting is excellent single plants obtained by screening of early planting in the current year, and so on until single plants with stable characters are obtained; the genetic correlation between a single plant with stable characters and the medicinal wild rice is verified by adopting an SSR marker, and if a specific DNA fragment of the medicinal wild rice is amplified from the single plant with stable characters and a corresponding fragment cannot be amplified from receptor rice, the breeding is successful. The method disclosed by the invention can be used for rapidly breeding a new red rice variety with medicinal wild rice gene polymerization.

Description

technical field [0001] The invention belongs to the technical field of rice breeding, in particular to a method for breeding new red rice varieties by using medicinal wild rice. Background technique [0002] Rice is one of the most important food crops in my country. More than 65% of the population in China eats rice as the staple food. It is the largest rice producer and consumer in the world. The annual sown area of ​​rice is 30 million hectares, accounting for 20% of the world, and the output is 185 million tons, accounting for nearly 1 / 3 of the world. The yield per unit area is 6.35 tons / ha, 65% higher than the global average yield of 3.85 tons / ha. The achievement of this achievement depends on the support of rice breeding technology. In recent years, rice breeding research in my country has progressed rapidly, and hybrid rice breeding research has continued to maintain a world-leading level. Conventional rice breeding research has formed a new pattern of catching up wi...

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Problems solved by technology

At present, the methods for breeding new varieties of rice in this field mostly adopt conventional breeding methods or hybrid breeding methods, which have the defect of long breeding cycle, and the prior art has not had any relevant research on how to use medicinal wild rice to breed new varieties of red rice. Research

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