Method for identifying the springness and winterness of wheat varieties and regulating flower synchronization

Abstract

The invention relates to a method for identifying the springness and winterness of wheat varieties and regulating flower synchronization. In December of every year, at the low position of a vegetable greenhouse warm in winter in the east-west direction, the wheat varieties which are to be identified and to be adopted as parents and the springness-winterness comparison wheat varieties of which the springness and winterness are known are planted in the north-south row direction, the row direction is perpendicular to the low edge of the greenhouse, the wheat variety which is late in heading and has a large heading (flowering) time difference on both ends of the same line (the heading-flowering of wheat at ends close to the edge of the greenhouse firstly occurs through vernalization) belongs to the winter variety; the wheat variety which is early in heading and has small heading (flowering) time difference on both ends of the same line (even the heading-flowering of the wheat at both ends occurs in the same period) belongs to the spring variety. Through the influence of the low temperature outside the winter greenhouse to the close temperature in the greenhouse and by virtue of the temperature-difference effect generated by different distances to the edge of the greenhouse, the speed of vernalization and growth of wheat is influenced, the springness and winterness of wheat varieties can be identified, and time of flower synchronization among different varieties is greatly prolonged, the flower synchronization of any two wheat varieties can be realized with the combination of intermission seeding, and the two wheat varieties are mutually cross-fertilized to be utilized as parents.

Description

technical field [0001] The invention relates to the technical field of wheat germplasm identification and breeding, in particular to a method for identifying the winter-spring nature of wheat varieties and adjusting the meeting of flowering periods to facilitate hybrid utilization. Background technique [0002] Normally, the flowering period of a wheat variety lasts 2 to 3 days for a single ear, and 5 to 7 days for the whole wheat field. The ability to adjust the flowering period of elongated varieties by adjusting the sowing date is limited, generally no more than 2 to 3 days; water control can promote early flowering, overwintering mulching can promote early flowering, and increasing nitrogen fertilizer and watering can delay flowering, but The maximum prolongation period of all these comprehensive adjustment effects on the flowering period is no more than 10 days, which is still not as large as the difference in the heading and flowering period of some varieties in differ...

AI Technical Summary

Problems solved by technology

However, under normal circumstances, this method is affected by natural environmental factors, and it is not possible to carry out cross-breeding between winter and spring wheat while combining winter and spring sex identification, because winter wheat has late heading and flowering, and usually has entered the high temperature period in summer. Wheat hybrids affected by high temperatures usually produce hybrid seeds with good germinability