Breeding method of hybrid onions for bolting

Abstract

The invention discloses a breeding method of hybrid onions for bolting. The breeding method comprises the following steps of 1) breeding and expanding propagation of a female parent and a maintainer line of the female parent are carried out, specifically, directional systematic breeding is carried out, and the selection standard is that the length of pseudobulbs is more than 25 cm, the pseudobulbsare not easy to lodge, after three generations of purification and breeding for 6 years, small-area mixed seed reservation is carried out, plants are named as R02E, R02E male sterile plants are searched, one-to-one single-plant bagging backcross is carried out with homologous fertile plants, after four-generation systematic backcross, a sterile line with the male sterility rate of 99.9% or aboveis selected as a female parent, the female parent is named as R02E-A, and the corresponding maintainer line of the female parent is named as R02E-B; 2) male parent breeding and expanding propagation are carried out, wherein a material easy to bolt is bred by adopting a late sowing directional system to obtain a material named as XC08E, the bolting rate of the material reaches 95% or above, six-generation single-plant selfing is carried out on the XC08E to obtain a male parent with the late sowing bolting rate of 99% or above, and the male parent is named as XC08E-C; and 3) hybrid combination seed production is carried out, specifically, an autumn sowing three-year seed collection method is adopted for the female parent, and an autumn sowing two-year seed collection method is adopted for the male parent to obtain hybrid seeds. The onions bred by the method are easy to bolt, and edible parts of onion sprouts are long and tender.

Description

technical field [0001] The invention relates to the technical field of onion breeding and cultivation, in particular to a method for rapid breeding, multiplication and seed production of easy-to-bolt onions that are easy to operate, have good effects, and can efficiently research new varieties of onions for stalks and produce seeds. Background technique [0002] Onion (Allium cepa L., 2n=16), also known as onion, onion, and jade onion, belongs to the biennial herb of the genus Allium in the family Liliaceae. Bolting and flowering mark the transformation of plants from vegetative growth to reproductive growth, and are one of the important characteristics of plant development. For onion bulbs as the main product organ, early bolting will affect its yield and quality, making its commerciality worse, which is not conducive to production and sales. However, with onion sprouts as the product organ, it is necessary to ensure the proportion of bolting, yield Can meet market demand....

AI Technical Summary

Problems solved by technology

For onion bulbs as the main product organ, early bolting will affect its yield and quality, making its commerciality worse, which is not conducive to production and sales. However, with onion sprouts as the product organ, it is necessary to ensure the proportion of bolting, yield Can meet market demand

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