Method for breeding colored rice two-line hybrid rice

Abstract

The invention discloses a method for breeding colored rice two-line hybrid rice. The method comprises the steps of carrying out hybridizing by taking colored rice +C as a male parent and a two-line sterile line S as a female parent, and carrying out backcrossing with the female parent to obtain BCnF2 generation seeds; selecting male sterile plants, carrying out paired test cross on the male sterile plants and a two-line restoring line R, and selecting and maintaining homozygous sterile line plants with colored seed coats and corresponding hybrid seeds; detecting seed heterosis, and selecting and maintaining hybrid plants and sterile line plants with heterosis to obtain colored rice sterile line seeds; identifying the fertility, yield, quality and resistance of the sterile line to obtain excellent colored rice sterile line plants; and breeding seeds to obtain a colored rice two-line hybrid system. According to the method, the colored rice and the two-line sterile line of the approved hybrid rice are hybridized and backcrossed, and the two-line sterile line plants with the colored seed coats and heterosis are screened through the restoring line, so that the obtained colored rice hybrid rice and the sterile line thereof not only have the colored seed coats, but also have the advantages of high yield, high quality and disease resistance.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a breeding method for two-line hybrid rice of colored rice. Background technique [0002] Colored rice refers to the color of brown rice, mainly black, purple, red, yellow, green and so on. Colored rice is brown rice because it contains seed coat, rice germ and aleurone layer, so its protein, fat, amino acid, vitamin, mineral trace element content is significantly higher than that of white rice (polished rice) eaten daily, and it is rich in natural pigments And a variety of physiologically active substances, it is very consistent with the traditional food culture of "both food and medicine" in our country. For example: in the folk, black rice is called "longevity rice", and there is a saying that "when it is black, it must be nourished"; red rice is often used to "enrich blood", which can nourish yin and kidney, invigorate the spleen and appetizer, and is a health food for...

AI Technical Summary

Problems solved by technology

For the above-mentioned varieties, whether they are red rice or black rice hybrid varieties, the sterile lines are common non-colored rice, and only the restorer lines are red rice or black rice. Restricted by genetic characteristics, the seed coats of these varieties are not obvious enough. For example, the brown rice of red rice hybrid rice is reddish-brown, atypical red; the brown rice of black rice hybrid rice is black or dark brown. Although the yield and resistance are higher than those of conventional colored rice varieties, the functional nutrition has decreased. , compared with hybrid rice super varieties, there is no advantage in yield and quality, which restricts the application of production and consumers

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