关键词: 平衡施肥, 平衡施肥

Abstract:

In this paper, the value of flue-cured tobacco recurrent selection breeding were summed up on the basis of the literature of foreign scholars, along with, advantages of recurrent selection applied in flue-cured tobacco breeding were analyzed combined with the characteristics of flue-cured tobacco crops. Finally, combined with breeding experience, this paper pointed out that constructing tobacco recurrent selection basis groups should pay attention to choice of parents, number of parents and synthesis method of base group; put forward that recurrent selection program of multi-objective breeding for flue-cured tobacco should be improved mass selection method combined with S1 selection method; and recommended the use of open recurrent selection scheme with the timely introduction of excellent germplasm gene with appropriate genetic ratios, the determination of recurrent selection population size according to the germplasm contained in basis groups, genetic model and genetic complexity of selected traits, the determination of selection intensity for offspring based on the scale of recurrent selection population, the actual process of recurrent selection and the genetic model of target traits, and the selection of multi-objective traits at the same time using a constraint index.