جستجوی مقالات مرتبط با کلیدواژه "تنوع ریخت شناسی" در نشریات گروه "زیست شناسی"

Rose is one of the most important genera of the Rosaceae family and Rosa damascena Mill. is the most prominent rose cultivated in Bulgaria, India, Turkey and Iran to produce perfume. In order to identify populations of R. damascena, morphological characteristics of this species were considered as the first and most important criterion in explaining the genetic status. Samples were taken from 750 hectares of Kashan and other areas of Isfahan province such as Meymeh (Ziyad Abad), Chadegan, Semirom and Najaf Abad and in each specimen, the shape and color of the stem, spiny or spineless, leaf shape and its length, number of leaflet, length and width of terminal leaflet, color of upper and lower of leaf, edge and base of leaf, color and number of petals, number of stamen and at the end of season, shape and color of fruit and number of seeds per fruit were evaluated. Also, the morphology of ornamentation of seed surface of these populations was studied and compared using scanning electron microscopy. According to the results, the morphological traits of different populations known as Kashan and Kazeroon were not different, but the populations known as Tabriz and Meymand showed significant differences in number of spine, shape of fruit and seed number in fruit. No significant differences were observed in seed cover decorations for all types of R. damascena populations and this trait could not be used for separation of different populations.

Achillea is one of the important medicinal plants in Iran which has been used widely in medicinal, cosmetic and health care industries. Agro-morphological diversity of wild populations of Achillea nobilis L. subsp. neilreichii and A. aleppica DC. subsp. aleppica was investigated. The investigated traits were: plant height, plant diameter, flower diameter, number of flowers and fresh and dry weight. Results showed that there are significant differences between populations, and some populations showed distinctively better results than the others. In A. nobilis, Population "Gilan7" showed highest amount and "Semnan" showed the lowest amount for different agro-morphological traits. Correlation effect analysis of A. nobilis Populations showed that there are significant positive correlation between yield (average fresh weight of each plant) and flower diameter. This is the only correlation found between vegetative and reproductive traits. Cluster analysis grouped A. nobilis populations into 5 clusters. The valuable by-product of Achillea is mainly located in the flowers and top part of the flowering stems so cluster 4 and 5 contained most desirable populations because they had highest amount of flowers and flower diameter. In A. aleppica, "Elam" population with high amount of flowers (8.17) and lowest amount for plant diameter is a Superior population because it let us to have more plant in a unit area and produce. These results are very helpful for improving and introducing more suitable varieties.