Annual three-generation inbred line breeding method of pumpkin

Abstract

The invention discloses an annual three-generation inbred line breeding method of a pumpkin, which comprises the following steps: in spring in the first year, seeding in a period from March 15th to March 25th, and finishing in a period from July 20th to July 27th, wherein the growing time is 120-125 days, the ground is covered with a mulching film, furrows are formed under the mulching film, the furrow depth is 15-18cm, the row spacing is 90cm, the seed spacing is 50cm, seeds are alternately sown in wide and narrow rows, the seeds are released from the mulching film after late frost, and other management method is the same with the conventional method; in autumn, seeding in a period from August 5th to August 15th, and finishing in a period from October 25 to November 5th, wherein the growing time is 80-90 days, the seeding mode is the same with that used in the spring, a shading net and an insect net are built to cool plants and prevent insects from the seeding time to the first ten-day period of October, and a low tunnel is constructed to prevent early frost after the middle ten-day period of October; and in winter, seeding in a period from November 10th to November 15th in Hainan, and finishing in a period from February 20th to February 27th next year, wherein the growing time is 100-110 days.

Description

technical field [0001] The invention relates to the technical field of hybrid breeding, in particular to a method for selecting a third-generation inbred line of Zucchini Anniversary. Background technique [0002] At present, zucchini is produced using first-generation hybrid seeds, so the breeding of new varieties is mainly done through heterosis breeding. Heterosis refers to the phenomenon that the hybrids produced by the hybridization of organisms with different genetic compositions are superior to their parents in terms of growth vigor, stress resistance, adaptability and yield. Large-scale use of heterosis in agriculture began in the 1930s, when hybrid corn was first applied to production and developed rapidly. In today's world, the use of heterosis in field crops, vegetables, fruit trees, flowers, forest trees, and breeding animals is becoming more and more extensive. [0003] The characteristic of heterosis breeding is "purity first and then hybridization". The gene...

AI Technical Summary

Problems solved by technology

Greenhouse addition can speed up the process of hybrid combination comparison, but due to insufficient light and daily accumulated temperature in greenhouse, mature seeds cannot be harvested, and at the same time, it is limited by the area of ​​the greenhouse

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