梨杂种实生苗结果迟,育种周期长,如果在苗期进行预先选择,淘汰劣株,就能节省劳力、土地。米丘林、布尔班克等育种家曾根据杂种实生苗的针刺状况,枝、叶形态等营养性状进行果实品质优劣的预选。如米丘林认为:植株粗壮,新梢先端粗,叶片大而厚,叶柄粗,无尖锐的针刺等,为梨的栽培性状。并认为:苗期即表现栽培性状是最有价值的实生苗。 Pear hybrid seedling results late, breeding cycle is long, if pre-selection at seedling stage, out of bad, you can save labor and land. Michurin, Boolean Bank and other breeders have acted according to hybrid acacia seedling status, branch, leaf morphology and other nutritional traits of the pros and cons of fruit quality. Such as Michurin think: stout plants, shoots tip thick, large and thick leaves, petiole thick, no sharp acupuncture, pear cultivation characteristics. And that: the performance of seedling that is the most valuable cultivation of seedlings.