Method for propagating rice leaf marking sterile series

Abstract

A propagating method for leaf markering sterilization line of rice features high technical level and saving labour, so it is a great improvement for culturing hybrized rice seeds.

Description

Technical field: [0001] The invention belongs to the field of utilization of heterosis, and in particular relates to a method for breeding, breeding and seed production of a rice leaf-clad marker sterile line. Background technique: [0002] China is the only country in the world that can produce and utilize hybrid rice seeds on a large scale, but there are still many problems to be solved in production, such as low technical content of sterile lines and high cost of breeding and production. The main technical defect of the rice sterile line popularized and used in production at present is: 1. The leaves of the sterile line are upright, and the ear layer is below the leaf layer. The upright leaf hinders the pollen transmission of the male parent to the female parent, and the rice grower has to cut it off when the ear starts. Sword leaf; 2. The heading performance of the sterile line is poor, and a considerable part of the rice ears are wrapped in the leaf sheath and cannot be...

AI Technical Summary

Problems solved by technology

[0002] China is the only country in the world that can produce and utilize hybrid rice seeds on a large scale, but there are still many problems to be solved in production, such as low technical content of sterile lines and high cost of breeding and production

The main technical defect of the rice sterile line popularized and used in production at present is: 1. The leaves of the sterile line are upright, and the ear layer is below the leaf layer. The upright leaf hinders the pollen transmission of the male parent to the female parent, and the rice grower has to cut it off when the ear starts. Sword leaf; 2. The heading performance of the sterile line is poor, and a considerable part of the rice ears are wrapped in the leaf sheath and cannot be drawn out. The rice farmers must spray gibberellin (920) to promote heading, and the cost of 920 per hectare is based on the current market price. 3. The stigma of the main sterile line is short and poorly exposed, the exposed rate is about 30%, and the exposed rate is only 60% after spraying 920; 4. The flowering time of each flower of rice does not exceed two hours , if the stigma is not exposed after closing, there will be no chance of pollination