evaluation of morphological, phonological and essential oil yield in populations of four chamomile species anthemis tinctoria, a. haussknechtii, a. pseudocotula and a. altissima under field condition

in other to evaluation of morphological and phenological traits of 24 populations, from four species chamomile of the genus of anthemis, an experiment were carried out using randomized completely blocks design (rcbd) in three replications in alborz research station in karaj, iran during 2011-12. 13 traits including: length and width of canopy diameter, plant height, number of flower, shoot fresh and dry weight, growth degree days (gdd), essential oil percentage and essential oil yield and plant height were evaluated. mean comparison of the four anthemis tinctoria, a. haussknechtii, a. pseudocotula, a. altissima, showedthatanthemis tinctoria hadhigher length of canopy diameter, shoot fresh and dry weight and plant height than other species. mean comparison of the population of four population showed that galikesh population (anthemis haussknechtii) had higher mean value of length and width of canopy diameter, plant height, number of flower, shoot fresh and dry weight than other populations but baneh two population (anthemis tinctoria) had higher mean value of essential oil yield compare with other populations. regarding of positive correlation of vegetative and generative of the genus of anthemis and maximum traits interpretation showed that essential oil yield was followed shoot fresh and dry weight, width of canopy diameter and plant height. cluster analysis of the populations of anthemis tinctoria, a. haussknechtii, a. pseudocotula and a. altissima showed that the populations divided into four groups and therefore it was proved the reason of relationship between them.