Selective breeding method for high-nutrition rice varieties

Abstract

The invention discloses a selective breeding method for high-nutrition rice varieties, which belongs to the technical field of special rice seed breeding. The selective breeding method disclosed by the invention comprises the following steps of: selecting high-yield, high-quality and disease-resistant rice varieties as recurrent parents; hybridizing the recurrent parents with iron-rich rice variety IR164, high-sugar rice variety Bai Tian No.1, high-lysine rice variety Milyang 164 and high-cellulose rice variety water source 464 respectively; performing backcross and convergent cross for times; and breeding the high-nutrition rice varieties having economical characters and yield characters which are similar to the economical characters and yield characters of the recurrent parents, and rich in the nutritional ingredients of iron, sugar, lysine, cellulose and the like by selecting the economical characters, yield characters, iron content, sugar content, lysine content, cellulose content and the like of separating generations.

Description

technical field [0001] The invention specifically relates to a method for breeding high-nutrition rice varieties, and belongs to the technical field of special rice breeding. Background technique [0002] In recent years, the nutritional and health functions of rice have attracted more and more attention from consumers. Some special rices are favored by consumers because of their unique health effects on the human body. For example, the International Rice Institute has bred the iron-rich high-yielding rice variety IR164 with an iron content of more than 25 mg / kg, Swiss breeders have bred the "Golden Rice" variety (Golden Rice) rich in vitamin A, and Korean breeders have bred sweet rice hwachengbyeo su- 1, hwachengbyeo su-2 (total sugar content up to 5%-9%), powdery rice hwachengbyeofro, soft rice, high lysine rice variety Milyang164, high cellulose variety "Shuiyuan 464" (the dietary fiber content of brown rice and polished rice 2 times and 3 times higher than the control r...

AI Technical Summary

Problems solved by technology

[0003] However, the varieties reported so far are all rich in 1-2 kinds of functional ingredients, and rice varieties rich in multiple functional ingredients are relatively rare, especially rich in iron (trace elements needed by the human body), sugar (to improve taste), lai There are no reports of high-nutrition rice varieties with 4 kinds of nutrients such as amino acid (essential amino acid for human body) and cellulose (to improve gastrointestinal function)