Hybrid breeding method for pumpkin

Abstract

The invention discloses a hybrid breeding method for pumpkin by annual three generations, which is characterized in that: combinations are configured in a breeding field in spring of the first year, the combinations are preliminarily screened in the breeding field in autumn, and the enlargement and small-area seed production are performed on selected excellent combined parents in Hainan province in winder; the combining ability is determined in the breeding field in spring of the next year, variety comparison experiments are protectively performed in winter, and the enlargement and small-areaseed production of pioneer combined parents are continued in Hainan province in winder; the variety comparison experiments are continued in spring and autumn of the third year so as to select the optimal hybrid; the female parent is an inbred line 02-8A bred by performing seven generations of homozygous inbreeding on a hybrid winter jade according to an inbred line breeding method by annual threegenerations; and the male parent is an early-matured inbred line with a code number of 9601-4B obtained by hybridizing stable green-peel inbred line (with the code number of SQ96) selected by early-matured inbreeding separation in Seoul in spring in 2000 with a Chinese resource Heilongjiang small white-peel inbred line (with the code number of B) and performing four generations of homozygous inbreeding according to a female parent breeding method.

Description

technical field [0001] The invention relates to the technical field of hybrid breeding, in particular to a three-generation hybrid breeding method 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 general procedur...

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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