Breeding method for early-maturing hybrid broccoli in additive selection

Abstract

The invention relates to a breeding method for a plant, in particular to a breeding method for broccoli, belonging to the technical field of plant cultivation. The breeding method comprises the following steps of: performing continuous selfing and directional selection for at least five generations through collected broccoli material to obtain a self compatible line of the broccoli to serve as a transformation male parent to be hybridized with a cytoplasmic male sterile material; breeding a cytoplasmic male sterile line with superior comprehensive performance and stable genetic character through backcross transformation of five generations; then hybridizing the cytoplasmic male sterile line with stable genetic character with the superior self compatible line of the broccoli; and performing field repeated identification and screening to obtain superior hybridized combined variety. According to the method, an optimal growth and development environment for the broccoli is created though low-temperature treatment of seeds in coordination with related facilities and equipment; double blossom and seed setting are realized in one year; the breeding progress can be quickened; and the seed quality is improved.

Description

technical field [0001] The invention relates to a plant breeding method, in particular to a broccoli breeding method, and belongs to the technical field of plant cultivation. Background technique [0002] Broccoli is a variety of Brassica oleracea in the family Brassicaceae. It is a biennial herb with the scientific name Brassica oleracea L.var.italica planch. It is evolved from cabbage and is native to the Mediterranean region. Broccoli forms a green and fat flower ball on the top of the main stem, and the small flower buds on the surface are obvious. The tender stems of the flower buds are collected for food, because they are rich in vitamins A, B, C, E, protein, anthocyanins, minerals, etc. Nutritional ingredients, more vitamin C, higher than Chinese cabbage, tomato, celery, crisp and tender meat, sweet flavor, rich nutrition, excellent taste, recommended by "Time" magazine as the fourth in the top ten healthy foods. Since the early 1980s, my country began to introduce s...

AI Technical Summary

Problems solved by technology

Because broccoli is a biennial vegetable, under normal circumstances, it blooms once a year, that is, it can only be bred or self-bred and purified once a year. Therefore, it takes a long time to breed a hybrid variety, and there is a lack of practical use that can speed up the hybridization of broccoli. Breeding method

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