Method for killing male of japonica rice by warm water

Abstract

The invention belongs to the warm water male-killing technical field of japonica rice, and provides a method for killing male of japonica rice by warm water. The method comprises the steps of digging out to-be-hybridized female parents in the afternoon of the previous day of blooming; cutting too old and too tender tillers; removing bloomed glumous flowers and glumous flowers with tender base part; selecting glumous flowers which will bloom in 2-3 days, directly cutting 1 / 2 of the glumous flowers; in the morning of day for pollination, preparing one pot of warm water at 45 DEG C; soaking the cut japonica rice ears in the warm water at 45 DEG C in about 2 hours before the female parent blooms normally; after 3-5min, taking out the ears, and flicking extended anthers to enable stigma to be bared, wherein the anthers extend successively; covering the female parent with kraft paper bag after male-killing, transfering the female parent to place near male parent, and taking the male parent to pollinate when blooming; grouping the pollinated female parents for transplanting; cutting the hybrid seeds when maturing. The method for killing male of japonica rice by warm water breaks through hybridizing time limit of the japonica rice, increases hybridization efficiency, has good pollination effect, improves outcrossing maturing rate, is low in glumous flower-cutting technology demand and kills male thoroughly.

Description

technical field [0001] The invention belongs to the technical field of japonica rice detasseling with warm soup, in particular to a method for japonica rice detasseling with warm soup. Background technique [0002] The hybridization of rice can be divided into detasseling and pollination in terms of steps. At present, there are many methods of detasseling adopted by breeding units, including scissor picking method, chemical detasseling method, vacuum detasseling method, hot air detasseling method, and warm soup detasseling method. . [0003] Because of its simple operation and low equipment requirements, warm soup killing males is the most popular among breeding units. The method is to treat rice ears with warm water at 45°C for 5 minutes on the day of pollination to achieve the purpose of killing males; its disadvantage is that it is limited by time. A person only has 3-4 hours in the morning to cut glumes every day, which limits the progress of rice hybrid breeding. Con...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for destabilizing japonica rice in warm soup, which aims to solve the problem that the method of destabilizing in warm soup provided by the prior art is largely limited by time, and a person only has 3-4 hours in the morning to cut glumes every day, which is limited. The progress of rice hybrid breeding has been hindered, but the production efficiency is low and the labor intensity is relatively high.

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