Analysis of Principal Components for Celery Seedlings High Temperature Resistance
ZHU Xin1，2，SHEN Huo-lin1*
（1Collage of Agronomy and Biotechnology，China Agricultural University，Beijing 100094，China；2Tianjin Facility Agriculture
Research Institute，Tianjin 300192，China）
Abstract：The high temperature resistance of 8 celery（Apium graveolens L.） varieties at the seedling stage was evaluated by principal components analysis and subordinate function analysis．The results showed that 32 high temperature resistance indexes with significant differences could be classified by principal components analysis into 7 new comprehensive indexes with mutually independent components analysis．Through subordinate function analysis，the order of high temperature resistance from high to low was‘Wentula mutation lines’＞‘Jiazhouwang mutation lines’＞‘Jinnanshiqin’＞‘Yota 52-70’＞‘Cuinenxiqin’＞‘Kangnaier’＞‘Fuqin’＞‘Jinhuang’，which was consistent with the results of field observation in the past several years．
