Pollination method for purity-conservation Chinese cabbage breeding material

Abstract

The invention relates to a pollination method for a purity-conservation Chinese cabbage breeding material. The method comprises the steps of: conducting soil preparation, harrowing, ridging, levelling, treading and top ridging; selecting a Chinese cabbage plant, removing old, diseased and rotten leaves, cutting away the upper half of the plant capitulum, dipping the root of the whole plant in a mixed solution of 100 times of carbendazim and chlorothalonil, then carrying out field planting to the plant in the middle of the ridge back, treading the root, and coating the root with a mulching film; covering the whole plant with an isolating net enclosure before the entering of the Chinese cabbage plant into an initial flowering stage, and inserting fixation rods on two sides of the isolating net enclosure respectively, fixing the isolating net enclosure on the fixation rods; when daily flowering quantity of the Chinese cabbage plant reaches more than 20, putting 2 bumblebees into the isolating net enclosure of each Chinese cabbage plant, then imbedding the mouth of the isolating net enclosure to the underground; after putting the bumblebees, spraying a mixed solution of 3%-4% of salt and 500 times of borax by mass every morning.

Description

technical field [0001] The invention relates to a self-pollination method, in particular to a method for pollination of pure Chinese cabbage breeding materials, and belongs to the technical field of vegetable breeding. Background technique [0002] Chinese cabbage belongs to Brassicaceae, insect-pollinated flowers, cross-pollinated crops, and most Chinese cabbage varieties have poor self-pollination compatibility. The traditional Chinese cabbage variety Baochun is preserved by natural isolation of 1-2 kilometers and natural pollination. But such Chinese cabbage varieties are still easy to hybridize naturally, resulting in the mixing of Chinese cabbage breeding materials. In the 1970s, Chinese cabbage breeding units adopted the method of "single inflorescence in a parchment bag and artificial pollination" for the purification and rejuvenation of Chinese cabbage breeding materials and the selection and purity of inbred lines. Although the effect of pollination isolation is be...

AI Technical Summary

Problems solved by technology

However, such Chinese cabbage varieties are still easy to hybridize naturally, resulting in the mixing of Chinese cabbage breeding materials.

In the 1970s, Chinese cabbage breeding units adopted the method of "single inflorescence in a parchment bag and artificial pollination" for the purification and rejuvenation of Chinese cabbage breeding materials and the selection and purity of inbred lines. Although the effect of pollination isolation is better, it has many shortcomings. , mainly manifested in: the flowering period of Chinese cabbage is relatively concentrated, and a large amount of manual work is required to simultaneously peel and pollinate single inflorescence buds; Powder, so that breeding resources are artificially mixed or lost