在山西省交城县采用全光照自动间歇喷雾装置对野生珍珠梅优良单株进行嫩枝扦插试验。
Soft cutting propagation of fine strain of wild Sorbaria sorbifolia was carried out in Jiaochen county of Shanxi under the full sunlight and automatic intermittent spraying.
论述了优树选择应遵循优良种源区选择优良林分，优良林分中选择优良单株的系统选择原则。
The selection principle is selecting stand from fine seed source and from them selecting fine individuality.
通过综合指数选择法，选出了优良速生、耐寒家系和单株，并率先选择了速生、耐寒且木材品质好的优良单株。
Ultimately some elite families and trees with rapid growth, good cold tolerance and good wood properties were selected by a comprehensive index method.
特别是自交高度不亲和性，往往使得优良单株基因型很容易丢失，给优良品种选育材料的繁殖和保存带来了极大困难。
Especially, what self-crossing is highly no appetency makes easy lose of good single genotype, which propagatation and conservation of good varieties breeding brings great difficulty.
特别是自交高度不亲和性，往往使得优良单株基因型很容易丢失，给优良品种选育材料的繁殖和保存带来了极大困难。
Especially, what self-crossing is highly no appetency makes easy lose of good single genotype, which propagatation and conservation of good varieties breeding brings great difficulty.
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