论文部分内容阅读
短果枝型和非短果枝型(乔化型)之间也没有一条清楚的界线,在这二者之间有着不同程度的各种类型。了解一下美国短果枝型苹果芽变是怎样发现的,对于我国的育种工作可能会有一点参考价值。1955年,华盛顿州发生严重的冻害,果园和苗圃里的树大量死亡,尤其是生长旺盛的幼年树和苗木死亡更多,这种情况造成了苗木的缺乏,同时也造成了对苗木的需要大大增加,由于供不应求,因而原来认为不合标准而要淘汰的苗木也可以出售
There is also no clear boundary between the short fruit branches and the non-short fruit branch branches (Qiaoshu type), and there are different kinds of different types between the two. To find out how the short-shoot apple buds in the United States were discovered, there may be some reference value for our breeding work. In 1955, serious frost damage occurred in the state of Washington, resulting in the death of trees in the orchards and nurseries, especially the more vigorous young trees and seedlings, which caused the shortage of seedlings and the need for seedlings. Increase, due to demand, which previously considered substandard seedlings can also be sold