Gene for controlling rice grain width, grain weight and yield and application thereof

Abstract

The invention discloses a gene GW8 (Grain Width in Chromosome 8) (SEQ ID NO:1-6) for controlling rice grain width, grain weight and yield and an application thereof. The GW8 can control the shape and the size of a rice grain. The lateral and longitudinal division speed of the cell is affected by the GW8 to control the size and the length-width ratio of a husk, and the filling speed is regulated so as to affect rice yield. The GW8 can serve as a molecular marker for identifying the length-width ratio of the rice kernel and the kernel size species. The GW8 has a wide application prospect on breeding on the basis of improving rice yield and improving rice quality.

Description

technical field [0001] The invention belongs to the field of plant biotechnology. Specifically, the present invention relates to a gene for controlling grain width, grain weight and yield of rice and its application. The present invention also relates to the polypeptide encoded by the gene and the promoter sequence of the gene. Background technique [0002] Rice (Oryza sativa L.) is a very important food crop in the world, and it is also the largest food crop in my country. Nearly half of the world's population uses rice as a staple food (Tan et al., 2000). With the continuous increase of the world's total population, In order to solve the problem of food shortage, the improvement of yield will always be a crucial goal in the process of rice breeding. Moreover, with the improvement of people's living standards and the opening of the rice market, rice is traded as a commodity, and people's requirements for the appearance of rice and the quality of cooking and eating are also...

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So far, the related genes that play a positive re...

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