Breeding method of typically sterile non glutinous rice widely compatible sterile line with high stigma exposure rate

Abstract

The invention relates to a breeding method of typically sterile non glutinous rice widely compatible sterile line with high stigma exposure rate, belonging to the field of rice breeding. In the invention, indica type temperature sensitive sterile line Peiai 64S serves as a female parent, conventional non glutinous rice variety Xiushui 110 serves as a male parent, the two are hybridized, direction selection is carried out on later generations; single plant with good agronomic trait, high stigma exposure rate and early blossom time is selected, test cross is carried out on the single plant by typically sterile non glutinous rice sterile line Chunjiang 16A dwarfing-sterile, meanwhile, widely compatible testing seeds are used to carry out wide compatibility appraisal, thus breeding fine material Chunjiang 95 with high stigma exposure rate, early blossom time, good wide compatibility and capacity of staying sterile; Chunjiang 16A dwarfing-sterile / Chunjiang 95 F1 serves as the female parent, and Chunjiang 95 serves as the male parent to carry out back cross; fertility appraisal in a generation by generation manner and continuous back cross is carried out on the later generations after the back cross to transform the later generations after the back cross into typically sterile non glutinous rice widely compatible sterile line Chunjiang 95A with high stigma exposure rate and early blossom time, corresponding maintenance line thereof is Chunjiang 95B. The method of the invention has the advantages of improved fertility stability and hybrid non glutinous rice seed production output of non glutinous rice sterile line.

Description

technical field [0001] The invention belongs to the field of rice breeding, and in particular relates to a breeding method for a typical japonica rice wide-compatibility sterile line with high stigma exposure rate. Background technique [0002] According to the morphology of pollen development and the response to I-IK, three-line male sterile lines of rice can be divided into three types: normal, round and dyed. Typical abortive CMS lines are represented by wild abortive and dwarf abortive CMS lines. The pollen abortion period is earlier and occurs in the late mononucleate stage. The response of pollen grains to I-IK is mainly aborted, and The sex is not easily affected by environmental conditions such as high temperature, and the fertility stability is good. The rotten-type CMS is represented by the Honglian-type CMS. The pollen abortion period occurs at the binucleate stage. The response of pollen grains to I-IK is mainly rotten, and its fertility will be affected by high...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the production of hybrid japonica rice that the fertility stability of the japonica rice male sterile line is poor and the yield of hybrid japonica rice seed production is low, the present invention provides an indica wide-compatibility material that introduces high stigma exposure and early flowering. and the wide-compatibility gene, a method of breeding a typical japonica rice wide-compatibility sterile line with high stigma exposure rate and early flowering characteristics, so as to improve the fertility stability of the japonica rice CMS line and improve the hybrid japonica rice seed production output purpose

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