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树木杂交育种的目的是在于改良树种,也就是应用其遗传性不同的树种通过有性杂交(主要指人工授粉)的方式,使有价值的遗传因素结合起来,培育出速生、优质、抗性强而符合生产要求的新品种。进行杂交育种前,首先要了解树木的开花习性。即通过细致的花期观察,掌握树木开花的初、盛、末期,花粉的成熟期及撒粉延续时间,柱头最适宜的授粉期及延续时间。同时要了解花的构造,是单性花或两性花,是雌雄同株或雌雄异株,是雌花先成熟或雄花先成熟,掌握这些情
The purpose of tree hybrid breeding is to improve the tree species, that is to say, by applying the genetic hybridization (mainly artificial pollination) to different tree species so that valuable genetic factors can be combined to produce fast growing, good quality and strong resistance And meet the production requirements of new varieties. Before crossing breeding, we must first understand the flowering habits of trees. That through careful observation of the flowering period, to master the early flowering trees, Sheng, the end of the pollen maturity and dusting duration, stigma optimum pollination period and duration. At the same time to understand the structure of flowers, flowers are unisexual or bisexual, monoecious or dioecious, female flower first mature or male flower first mature, grasp these feelings