两端育种的理论与现状

THE THEORY AND PRESENT STATE OF TWO POLE BREEDING

摘要:

本文根据前人的分裂选择，高低杂交法，穿梭育种的研究结果及我们的育种实践，综述两端育种的理论与现状。认为两端育种利用修饰基因的缓冲作用，在群体内的优劣两端个体间进行多次轮回选择及杂交，开发作物的潜在变异。在选择方法上两端育种利用不同的地理环境，异地间交叉进行选择，选择适应性广的基因型，同时提出在人工创造的上下限两端栽培条件下进行选择的两端选择法及两端育种和生物技术结合应用于今后育种实践的新设想。

Abstract:

According to the former study of disruptive selection,high and low crossing,shuttle breeding method and our breeding experience,the theory and present state of two pole breeding method are reviewed.By using the buffer action of the modifying gene,the rotational crossing and recurrent selection between the superior and inferior lines in the colony,the potential variation of crops can be developed.As to the selecting method,two pole breeding method selects the genotype with more adaptive faculty among the different geographic conditions.A new breeding prospect is put forward here:link the two pole selecting method to selection under the artificial superior and inferior cultivation conditions and biotechnique together in later crop breeding.