A method for rapid cultivation of fragrant, high-grade and high-quality rice

Abstract

The invention discloses a method for quickly cultivating aromatic, high-grade, and high-quality rice. The steps are as follows: firstly, hybridizing a slender, fragrant variety A with a low-chalky, high-transparency variety B to obtain a single-cross F1, which is used as the male parent Recross with variety C with high thousand-grain weight to get recross F1. Carry out aroma gene molecular marker-assisted selection and agronomic traits screening on recrossed F1 single plants at the seedling stage, screen out single plants with aroma genes and excellent agronomic traits for anther culture, obtain H0 generation flower culture population, and screen out diploid lines ;In the H1 generation, the quality traits were screened, and the yield and resistance were investigated in addition. Finally, the rice with fragrance, thousand-grain weight above 25g, rice grain length above 7mm, aspect ratio above 3.5, amylose 13‑18%, and chalky grain rate were selected. No higher than 10%, chalkiness not higher than 1%, transparency grade 1, and a high-quality new rice variety with a polished rice rate of more than 45%.

Description

technical field [0001] The invention belongs to the technical field of molecular cell plant breeding, and in particular relates to a rapid cultivation method of fragrant, high-grade and high-quality rice. Background technique [0002] China is a big rice production and consumption country in the world. For quite a long period of time in the past, in order to solve the food shortage, the phenomenon of emphasizing the output and ignoring the quality was quite prominent. With the substantial improvement of my country's grain production capacity, the continuous improvement of people's living standards, and the intensification of international and domestic market competition, the problem of poor rice quality has become increasingly prominent, and has become a major obstacle to the development of rice production. [0003] At present, the high-grade and high-quality rice recognized by everyone refers to a type of rice variety with excellent physical and chemical quality, slender ri...

AI Technical Summary

Problems solved by technology

[0004] According to the supply and demand survey of my country's rice market, high-grade edible rice accounts for more than 10% of the market share, and at least 200,000 hm can be planted in Hubei Province 2 At present, the total planting area of ​​four varieties including Ezhong 5, Jianzhen 2, Exiang 1, and Xiangwan Xian 13 is less than 60,000 hm 2

At present, most rice breeding methods in my country take yield as the primary goal, while the primary goal of high-grade and high-quality rice is quality, and at the same time, yield and resistance must be taken into account. At present, there are no reports on the specific goals and methods of high-grade and high-quality rice breeding in my country.