论“株系循环双向选优法”

“株系循环双向选优法”是将新品种选育与原种繁殖相结合的新方法。该方法在遵循“纯中选优”原则生产原种的同时，根据育种目标，按照“优中选优”的原则选育新品种。该方法既区别于单纯生产原种的“株系循环法”，也区别于选育新品种的纯系育种法。

Study on Circulate Line Selection in Double Direction

Circulate line selection in double direction"is a new selection procedure combined multiplication of seeds and development of new varieties From this procedure foundation seed are produced according to the principle of "selection among purity" and at same time new varieties can be developed according to the principle of "selection among outstanding" It is differ both from the me thod of "circulate line selection" for seed reproduction and from the method of "pure line breeding" for varieties development