group comparison meaning in English

分类比较

Three types of cuticular thickening at the polar region of the guard cells are observed : slight cuticular thickening ; rod - shaped culicular thickening and rarely t - shaped thickening . with data obtained from the former research and personal observation , the cladistic methods were employed for the phylogenetic analysis of data and trees were rooted by out - group comparison using , the related genus kadsura . as result , a new system of the genus schisamdra michaux was reconstructed , and schisandra michaux was subdivided into 2 subgenus , 3 section , 2 series 10 species in this dissertation
整理有关五味子属植物研究的资料，补充搜集近期发表的资料和本人研究所得数据，以种为基本单元，选择近缘的南五味子属( kadsura )作为外类群，采用paup4 . 0b4a软件对本研究得出的性状数据作分支分析，重建五味子属的系统发育，修订和补充五味子属分类系统，在五味子属下设2亚属、 3组、 2系、 10种。