Method for massively preparing hybrid rice combination

Abstract

The invention belongs to the technical field of rice seed production, and discloses a method for massively preparing hybrid rice combination. The method comprises the following steps: determining thetime for simultaneously heading male and female parents; determining the sowing time of each sterile line and male parent according to the heading time and the duration from seeding to heading of maleand female parents; transplanting all male and female parents into the same district according to the sowing sequence; transplanting male parents on two sides of the female parents; performing contemporary application with 920 in the initial heading period after isolation; pollinating, and cutting off male parents; and harvesting. The method is applicable to multiple combination from one male parent with multiple sterile lines at the same time. The hybrid rice combination in hybrid rice breeding has large test-cross workload for cutting glume, low quality and small seed amount. While, the method has low requirement for working skills, namely common field planting and isolated operation; more hybrid combinations can be obtained in once preparation, higher efficiency can be achieved if larger number of sterile lines are arranged; and cutting glume is not required, seed organs are not destroyed, the seed has high quality, and the germination rate is high.

Description

technical field [0001] The invention belongs to the technical field of rice seed production, in particular to a method for preparing a large amount of hybrid rice combinations. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] The test and matching of hybrid rice combination is an important work content in rice breeding. At present, the mainstream method for breeding hybrid rice combinations is still crossing with glume clipping artificially, and a large number of glume clipping test crosses should be done for the sterile lines. Specifically, after the earing of the sterile line, cut off all the flowering spikelets that have already bloomed, and then cut off about 1 / 2 of all the unopened spikelets, then put on an isolation paper bag, cut off the flowering spikes of the male parent, and then start the process. pollination. This artificial clipping hybridization technology has high requirements on the...

AI Technical Summary

Problems solved by technology

[0005] In summary, the problems in the prior art are: In hybrid rice breeding, hybrid rice combination cutting glume test cross workload is heavy, the quality is low, and the number of seeds is small

Because there is no closed glume, the seeds of clipping hybridization are of poor quality, prone to mildew, and the germination rate is low. However, the test crossing workload is heavy, it takes a long time, and the seed setting rate is often not high, or it fails completely.

The bagging hybridization technology needs sorting and ear cutting, and the preparation combination cannot be expanded, only one-to-one hybridization can be performed, and the workload is relatively large

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