Breeding and cultivating method for early-matured, disease-resistant and loose purple cauliflowers

Abstract

The invention relates to a breeding and cultivating method for a plant, in particular relates to a breeding and cultivating method for loose purple cauliflowers, and belongs to the technical field of plant cultivation. The breeding and cultivating method comprises the steps of hybridizing a loose purple cauliflower breeding material with a semi-compact purple cauliflower breeding material to obtain seeds F1, and selfing single strains with high comprehensive agronomic characters after the seeds F1 are sowed to obtain seeds F2; performing microspore culture on single loose purple cauliflowers through flower buds suitable for the microspore culture from the mononuclear edging stage to the double-core early stage to grow a large number of normal regenerated plants, selfing excellent DH plants of the loose purple cauliflowers to obtain a loose purple cauliflower excellent DH strain 03-12 serving as a recurrent parent which is hybridized with a cauliflower cytoplasmic male sterility source material CMS05-6, performing five generations of backcross transformation and selection to form a cytoplasmic male sterile line CMS08-2, and hybridizing the DH strain serving as a parent with the excellent cytoplasmic male sterile line CMS08-2.

Description

Technical field [0001] The invention relates to a plant breeding and breeding method, in particular to a loose purple cauliflower breeding and breeding method, and belongs to the technical field of plant cultivation. Background technique [0002] Loose purple cauliflower is more and more characterized by its compact plant type, short growth period, green leaves, purple flower stems and flower buds, loose bulbs, long flower stems, good taste, high marketability, stress resistance and disease resistance. The more it is welcomed by growers and consumers. Loose purple cauliflower is mainly eaten with fatty buds and stems. The buds and stems are purple and beautiful, the flesh is crisp and tender, the flavor is sweet, and the nutrition is rich. It is rich in vitamins A, B, C, E, protein, anthocyanins, and minerals. Various nutrients such as substances. It combines the advantages of loose cauliflower, while removing the shortcomings of compact cauliflower, and has the difference in c...

AI Technical Summary

Problems solved by technology

However, the use of self-incompatible lines for seed production requires a lot of manpower and time for parental breeding (through artificial pollination at the bud stage), which is very costly, and the promotion area is limited by the number of seeds produced.

What is more unfavorable is that the long-term continuous self-trading of the parents will cause the vitality to degenerate, so that some excellent characters will be lost, and the hybridization rate of hybrids is difficult to reach 100%.

The use of dominant nuclear male sterile lines for seed production is cumbersome, complicated and difficult to popularize

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