Breeding method of early-ripe and disease-resistant broccolini

Abstract

The invention relates to a breeding method of crops, and particularly to a breeding method of broccolini, belonging to the technical field of plant breeding. The breeding method has the advantages that 1. the male sterility line belongs to cytoplasmic male sterility and maternal inheritance, and is stable in sterility, the sterile plant rate and the sterility are 100 percent, nectary is developed, more nectars grow, stigma is normal, flowering and fruiting characters are good, and a seedling does not yellow under the condition of low temperature and can not deteriorate after multi-generation backcross, transform is easy, growth is vigorous, and combining ability is strong; 2. a transformation early generation sterile line is stronger in growth vigor in comparison with a maintainer line and has the advantage of interspecies cross; 3. a later producing shoot of the transformation early generation sterile line is stronger than that of the maintainer line, and thus the transformation early generation sterile line material is early planted by 5 days in comparison with a backcross male parent; 4. F1 is prepared by using the sterile line, the seed yield is high, the seed producing cost is low and the labor is saved; and 5. a new variety prepared by using the sterile line is strong in disease resistance, and is remarkable in production increasing.

Description

technical field [0001] The invention relates to a method for breeding crops, in particular to a method for breeding broccoli, and belongs to the technical field of plant breeding. Background technique [0002] Broccoli is a new type of vegetable that is bred by hybridization of broccoli and kale, also known as small broccoli, broccoli, and asparagus broccoli. The English name is Broccolini, and the alias is Sweet Baby Brocclini. Broccoli is mainly eaten with fat and tender flower stalks. The flower stalks are green and beautiful, the meat is crisp and tender, the flavor is sweet and nutritious, rich in vitamins A, B, C, E, protein, anthocyanins, minerals, etc. A variety of nutrients. It combines the advantages of broccoli and kale, while removing the disadvantages of broccoli and kale. It is sweeter, crisper and more delicious than broccoli, and sweeter than kale, but it does not have the astringent green taste that kale often has; its appearance and flavor are far superio...

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, while the use of cytoplasmic male sterile lines for seed production can overcome a series of defects in the use of self-incompatible lines and other seed production

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