Technology for making male sterile of female lines for rice hybridization

Abstract

A technique for eliminating female parent self-bred seedlings from the hybridized rice seedlings with herbicide features that the female parent with recessive character of sensitive lethality to bentazon is chosen to hybridize with recovery line and during the stage from green presentation to ear sprouting the solution of bentazon (10 mg/L-5000 mg/L) is sprayed onto their leaves to eliminate said self-bred seedings for keeping the high-purity of hybridized rice seedlings. It can be used in high-speed discrimination of purity for hybridized rice seedlings.

Description

Technical field: [0001] The invention belongs to a production method for improving the purity of rice hybrids, in particular to a method for removing impurities from female parental self-bred seedlings by using herbicides in rice hybrid F1 generation seedlings. Background technique: [0002] Rice is a self-pollinating crop. The female parent used for hybrid seed production must have the characteristics of male sterility. But in many cases, the male sterility of the breeding female parent is not complete. For example, the light (temperature) sensitive male sterile line controlled by light and temperature, if it encounters abnormal low temperature during seed production, it will lead to partial recovery of fertility and self-crossing phenomenon. Another example is male sterility caused by chemical agents. Due to differences in agents and application conditions, incomplete male sterility sometimes occurs and self-fertilization occurs. The incomplete male sterility of the fem...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of mark removal is that it needs to be manually operated in the field, which is labor-intensive and difficult to remove.