Study of morphophysiological characteristics of Field bindweed (Convolvulus arvensis L.) population biotypes in Karaj using multivariate analysis methods

This research was accomplished during 2005 to 2006 at Weed Resaerch Department، Iranian Plant Protection of Research Institute for identification of morphophysiological variation of field bindweed population، and introduction of this weed biotypes in Karaj. The study was done by Principal Component Analysis (PCA) and Cluster Analysis (CA) based upon 43 morphological and physiological variables. Due to Karaj climate، The most important variables were shoot dry weight (SDW)، (5. 71-34. 40 g) total biomass (10. 56-36. 91 g) and leaf area (557. 56-1948. 34 cm2)، respectively. The results of this experience showed 11 biotypes in Karaj. The variability in morphological and physiological of these field bindweed biotypes may explain their different adaptability as the environmental conditions and different management practices change.