中国西南地区乡土杨树基因资源丰富，被认为是青杨组的现代自然分布和演化中心之一。

There are abundant genetic resources of poplars in southwest China, which is believed as a centre of Sect.

youdao

中国西南地区乡土杨树基因资源丰富，被认为是青杨组的现代自然分布和演化中心之一。

There are abundant genetic resources of poplars in southwest China, which is believed as a centre of Sect.

youdao