Screening method and system for japonica two-line thermo-photo sensitive genic sterile line and sterile line

Abstract

The invention belongs to the technical field of variety breeding and discloses a screening method and system for a japonica two-line thermo-photo sensitive genic sterile line and the sterile line. Thescreening method comprises material selection hybridization, additive generation compounding, target selection, first stage selection, second stage selection, third stage selection, ideal strain anddisease resistance combined systematic selection. The method combines genetic breeding and biological breeding to successfully invent a japonica-indica two-line sterile line by japonica rice and indica rice genote mixing technology, the panicle non enclosure degree of the japonica-indica two-line sterile line achieves 100%, necks naturally extend by about 100%, namely, 5cm, the necks are not easyto break without injection of any hormone for assisting when seed stem powder is prepared, and the technical problem that a large amount of hormone (920) is needed to spray to assist to solve panicleenclosure during production of seeds of all sterile lines in the field in China or abroad can be solved.

Description

technical field [0001] The invention belongs to the technical field of variety selection and breeding, and in particular relates to a screening method, system and sterile line of japonica two-line thermal-photosensitive male sterile line. Background technique [0002] At present, all the two-line male sterile lines in the world must use a large amount of hormone agents to assist them to extract all the ears wrapped in the pants because of the neck of the ears in large-scale applications. Affecting the yield and seed quality of seed production is a technical difficulty that is difficult for seed producers to control, and it adds a great economic burden to farmers and enterprises. [0003] Rice belongs to the Poaceae Oryza genus and is an extremely ancient crop. The history of artificial planting in my country has been at least 7,000 years. After long-term evolution and artificial domestication and creation under different ecological conditions, rice has been differentiated in...

AI Technical Summary

Problems solved by technology

[0010] At present, the male sterile lines of rice in the world all have ear necking under natural and suitable conditions, and the degree of necking is as high as 40%-60%. Applying all the spikes is convenient for glume opening and insemination, but it will also bring various technical risks. Excessive dosage will cause glumes not closed, female parent's neck broken, chaff brown, etc., small dosage or uneven spraying of spikelets The neck can not be completely beautiful, so that the florets cannot be bloomed and fertilized, resulting in low seed production. This kind of seed production has a high risk, resulting in air pollution in the seed production area, high cost of seed production, poor appearance of seeds, etc., causing harm to seed producers and enterprises. huge financial burden

After crossing indica rice and japonica rice, the stability of offspring is poor, and the breeding of this sterile line can solve the above problems

Images