A kind of hybrid rice breeding method

Abstract

The invention belongs to the technical field of rice planting, and discloses a method for hybrid rice breeding and seed production; measures such as field layout of parents, planting specifications, promotion of flowering of sterile lines, pollen collection of male parents, spraying and other measures; wherein parents are concentrated separately Planting, seedling machine transplanting for easy removal of impurities; different restorer lines are separated by distance or flowering period, male parent pollen is collected mechanically, and stored at ultra-low temperature; when 30% of the earing of the sterile line is reached, "920" is used to promote earing, and the earing of the sterile line is accelerated At 50% of the time, jasmonic acid or α-linolenic acid substances are used to promote concentrated flowering; mechanically collect pollen from the male parent, store it at ultra-low temperature, and spray pollen by drone; harvest hybrids. The invention contributes to the mechanization of the planting link in the process of breeding and seed production, and avoids mechanical confusion when the hybrids are harvested; avoids the failure of parents to meet at the flowering stage; the sterile line promotes concentrated flowering and sprays pollen with drones to reduce labor intensity. Improve the efficiency of breeding and seed production.

Description

Technical field [0001] The invention belongs to the field of rice planting, and more particularly to a method of hybrid rice breeding. Background technique [0002] At present, my country's rice planting area is about 3.1 × 10 8 HM 2 The rest is 1.7 × 10 8 HM 2 It is hybrid rice. Hybrid seed production has promoted the development of China's rice, and improves rice production in rice. Hybrid rice breeding is an indispensable link between hybrid rice breeding and hybrid rice food production, providing a sufficient source for large area of ​​rice. However, in the current seed production mode, hybrid rice breeding is a labor-intensive industry. With my country's population aging and a large rural labor force into the city, there have been many problems that need to be solved in the hybrid rice breeding industry. In the bread of hybrid water rice, often due to recovery system, the maintenance system and the insectional system do not meet or spend, resulting in decrease in the rose ra...

AI Technical Summary

Problems solved by technology

[0003] In summary, the existing problems in the prior art are: the current hybrid rice seed production method has a reduced seed setting rate, requires more labor input, low seed production yield, and low purity; complicated procedures and improper handling can easily damage pollen cells, Prolonged storage reduces pollen activity

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