Selecting and breeding method for long-grained hybrid japonica rice

Abstract

The invention discloses a selecting and breeding method for long-grained hybrid japonica rice. The method comprises the following steps of: (1) selecting a long-grained type rice resource material as a donor parent; (2) respectively hybridizing the donor parent carried with long-grained type gene and the traditional round-grained japonica rice restorer line and japonica rice maintainer line; (3) in the separation process of offspring, selecting seeds with rice grain length greater than or equal to 6.5mm harvested from single plants; (4) performing test mating on the stabled long-grained type material obtained from the step (3) with a japonica rice sterile line, and selecting to obtain a long-grained restorer line and a long-grained japonica rice sterile line; and (6) performing test mating on the long-grained japonica rice sterile line obtained from the step (5) with the long-grained restorer line obtained from the step (4), and preparing a new long-grained hybrid japonica rice variety. The selecting and breeding method provided by the invention is applied to grain type improvement on the existing round-grained hybrid japonica rice, creates the long-grained type hybrid japonica rice and obviously improves appearance and quality of rice.

Description

technical field [0001] The invention relates to the field of genetic breeding of hybrid rice, in particular to a method for breeding long-grain hybrid japonica rice. Background technique [0002] Asian cultivated rice has two subspecies of indica and japonica. Typical japonica rice is mostly short-grained and round-grained (5.0-5.5 mm in length), and there is a small amount of long-grained japonica rice resources, but the production and application are very few. Hybrid rice has been widely promoted and applied in my country because of its strong heterosis, which has played an important role in increasing rice production and ensuring food security in my country. The area is only about 3 million mu. However, so far, the hybrid japonica rice used in production is short-grained and round-grained (rice grain length 5.0-5.5mm), so that the current hybrid japonica rice does not have the long-grain appearance and high-quality quality that are popular in the market, which affects the...

AI Technical Summary

Problems solved by technology

However, so far, the hybrid japonica rice used in production is short-grained and round-grained (rice grain length 5.0-5.5mm), so that the current hybrid japonica rice does not have the long-grain appearance and high-quality quality that are popular in the market, which affects the hybrid japonica rice to a certain extent. production development

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