利用SSR引物的种间通用性，本研究分别从杨属和柳属中各随机筛选出10对SSR引物，对17个杨树品种和20个柳树品种的遗传关系进行了分析。

In this research, random screening of 10 SSR primers from Populus and Salix, respectively, and the genetic relationship among 17 poplar cultivars and 20 willow cultivars were studied.

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树种以油松、云杉、白桦、杨、柳为主，经济林有苹果、梨、桃、杏等，野生牧草种类较多，近100种。

Tree species in Chinese pine, spruce, birch, Yang, Liu mainly forests are apple, pear, peach, apricot and so many kinds of wild grass, nearly 100 species.

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我国北方农村的建筑用材，多以杨、柳、榆等速生树种为主，但这些木材易发生腐朽与虫蛀。

Most structural timber species now used in the North China's rural areas are poplar, willow, elm etc, which are fast growing trees but whose woods are very susceptible to biological deterioration.

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2月，杨元庆取代阿梅里奥，联想创始人柳传志(Liu Chuanzhi)再次成为董事长。

In February Mr Yang replaced Mr Amelio and Lenovo's founder, Liu Chuanzhi, became chairman again.

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柳传志表示，这段经历给杨元庆带来在联想目前希望专注领域的独特领导能力。

That experience gives Yang 'unique leadership ability' where Lenovo now wants to focus, Liu said.

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柳传志表示，这段经历给杨元庆带来在联想目前希望专注领域的独特领导能力。

That experience gives Yang 'unique leadership ability' where Lenovo now wants to focus, Liu said.

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