Cabbage type rape parent seed multiplication method

Abstract

The invention mainly aims at providing a cabbage type rape parent seed multiplication method which can not only ensure purity but also realize higher multiplication yield and lower cost. The method comprises the following steps of: sowing rape parent seeds in March, and controlling the growth temperature at 15-25 DEG C; transplanting in April, selecting the region with the altitude of above 1000m in Yangtze River valley in the south of Qinling-Huaihe Line in China as a transplanting region, adopting a plastic film for coverage, and breaking the film for transplanting; and enabling progenitive rape parents to bloom in May-June and mature in July-August. According to the invention, the high-altitude low-temperature region of the Yangtze River valley is substantively selected, the sowing is performed in spring, and a means for promoting growth is simultaneously adopted, so that the growth and development of plants can be ensured, and simultaneously, the flowering phase of the plants can be significantly staggered with the flowering phases of similar plants, thus the mixing can be avoided. The parent seed multiplication has good economy and high yield, and the method provided by the invention has extensive popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of agricultural cultivation, and in particular relates to a method for multiplying rapeseed parent seeds. Background technique [0002] Propagation of parental seeds is the main way to obtain parental seeds of hybrids, and the purity of the seeds is related to the purity and quality of hybrid seeds, as well as the safety and efficiency of agricultural production. In the prior art, in order to obtain the parent seeds with the highest purity possible, two methods are mainly used for the propagation of the parent seeds. Take Brassica napus as an example: either use greenhouses for isolation breeding, or set up a large-scale isolation area of ​​more than 1,500 meters around the breeding field, and no other cruciferous plants can exist within the isolation area. To prevent the pollen of other cruciferous plants from mixing and degrading with the parent, resulting in a reduction in the purity of the parent. [0...

AI Technical Summary

Problems solved by technology

[0003] Propagation of rapeseed in greenhouses has good purity, but the cost is high. The construction cost of greenhouses alone reaches 500-1000 yuan per square meter

Moreover, due to the lack of airflow and wind in the greenhouse to spread pollen, the rape seeding effect in the greenhouse is not ideal, especially the seeding effect of the sterile line is poor, and the breeding yield is extremely low.

[0004] Propagation of rapeseed parents in isolation areas has a large yield, but the workload of setting up isolation areas is also large, and other cruciferous plants need to be cleaned and removed, and the coordination around the work is complicated, the cost is high, and the purity is not guaranteed. If it is not thorough or encounters other factors such as strong winds, it is easy to cause the parents to mix and degenerate