Breeding method of indica-japonica intermediate type wide-compatibility restorer line with high alkali elimination value

Abstract

The invention relates to a breeding method of an indica-japonica intermediate type wide-compatibility restorer line with the high alkali elimination value, which comprises the following steps: taking a rice germplasm resource with an alkali elimination value of more than 6.5 as a parent, hybridizing the parent with a to-be-improved indica-japonica intermediate type wide-compatibility restorer line with a low alkali elimination value to obtain hybrid seeds, planting F1 and selfing to obtain F2-generation seeds, selecting single plants with excellent plant leaf morphology from the separated F2-generation population to harvest seeds, measuring the alkali elimination value of each single plant, and directly eliminating strains with low alkali elimination values or strains with separated alkali elimination values in low generations; carrying out continuous multi-generation selfing on a high-alkali-elimination-value strain, measuring the alkali elimination value of each generation, and selecting the plant leaf morphology to obtain the indica-japonica intermediate type wide-compatibility restorer line with excellent plant leaf morphology and the alkali elimination value of 6.5-7.0. The steps are simple and convenient to operate, the cultivation method is not redundant, and the obtained rice meets various requirements for taste.

Description

technical field [0001] The invention relates to a method for breeding a high-alkali consumption value indica-japonica intermediate wide-compatibility restorer line and belongs to the technical field of hybrid rice breeding. Background technique [0002] The use of heterosis has greatly increased the yield of rice in my country. At present, the planting area of ​​hybrid rice accounts for about 50% of the total planting area of ​​rice in my country. The breeding of new hybrid rice varieties is the original driving force for the development of the hybrid rice industry. In the early days, the hybrid rice varieties bred in my country were mainly intra-subspecies hybrid rice, and mainly concentrated in the indica subspecies; At the same time, due to the huge advantages in yield and resistance, more and more new hybrid rice varieties between indica and japonica subspecies have been approved in recent years, which has further improved the utilization level of rice heterosis in my cou...

AI Technical Summary

Problems solved by technology

[0003] Due to the late start of research on hybrid rice between indica and japonica subspecies, the rice quality of hybrid rice between indica and japonica subspecies is still relatively poor, especially the alkali digestion value of rice is low, generally around 4.5-6.0, which seriously affects the quality of rice. Compliance rate of cooking quality and high-quality rice