Double-cropping grape breeding method

Abstract

The invention relates to a grape breeding method, in particular to a double-cropping grape breeding method. The method comprises the following steps: S1, selecting a variety with high flower bud differentiation capability as a female parent variety, and cultivating the variety in a greenhouse; S2, by utilizing a one-year double-cropping cultivation technology, according to the specific time required by full ripening of secondary fruits of the female parent variety, taking twice flowering as a target, setting and controlling the temperature rising speed of the greenhouse, and arranging cultivation management of accelerating germination, promoting flowering, protecting fruits and promoting secondary flowering in the greenhouse; and S3, one week before primary blooming and secondary blooming,bagging partial flower spikes, conducting emasculation manually three days before blooming, taking the inflorescence which is not bagged as a reference, and artificially pollinating the inflorescenceat 18-28 DEG C in the morning when the inflorescence enters an initial blooming period. According to the method, one-year one-breeding is changed into double-cropping, so that the breeding efficiencyis greatly improved, and the method has very important significance for breeding. Pollination hybridization among a large number of parents can be carried out to obtain more hybridization samples, sothat an ideal hybridization variety can be found more quickly.

Description

technical field [0001] The invention relates to the breeding technology of grapes, in particular to a breeding method for two breedings of grapes a year. Background technique [0002] Grape has always been one of the most important fruits in the world, and its output and area are in the forefront of the world's fruits. Breeding high-quality, early-maturing, adaptable to local climate and soil, storable and fragrant varieties is always the direction of grape breeding. Grape breeding is a long-term work. Because the childhood period of hybrid seedlings is longer, it generally takes 3-5 years from sowing to the first flowering and bearing fruit, and it generally takes 10-15 years to breed a new variety. Moreover, grapes, like other asexually propagated woody fruit trees, have a high degree of heterozygosity in genetics, a large segregation range of hybrid offspring, and a low frequency of required traits, which brings great difficulties to breeding work and takes a long time ...

AI Technical Summary

Problems solved by technology

Moreover, grapes, like other asexually propagated woody fruit trees, have a high degree of heterozygosity in genetics, a large segregation range of hybrid offspring, and a low frequency of required traits, which brings great difficulties to breeding work and takes a long time and effort. Greater manpower, material and financial resources

[0003] Grape breeding methods mainly include hybrid breeding, biotechnology breeding, mutation breeding, molecular biology-assisted breeding, etc., but in practical applications, hybrid breeding is the main method. Currently, only one hybrid breeding can be carried out in a grape growth period, which limits It reduces the breeding efficiency, which is not conducive to the rapid selection of ideal hybrid varieties

Parents with different flowering periods are difficult to pollinate and hybridize, which limits the selection range of parents

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