جستجوی مقالات مرتبط با کلیدواژه "subspecies" در نشریات گروه "زیست شناسی"

The genus Nerium L. consists of perennial shrubs belonging to the Apocynaceae family, which are widely found in the warm and dry regions of western, southern, and southeastern Iran as wild plants. In this study, the quantitative and qualitative morphological traits of various Nerium populations across different regions of Iran were examined. Samples were collected from 100 individuals belonging to 38 different populations, and their morphological data were analyzed. Cluster analysis and Principal Component Analysis (PCA) were performed using the R software. The results indicated that leaf size, flower corolla color, and corolla appendages are highly valuable taxonomic traits and can aid in distinguishing different populations. However, taxonomic ambiguities persist regarding the overlap of certain morphological traits and the exact definition of subspecies. Therefore, molecular studies are recommended to resolve these ambiguities and confirm the results of morphological analyses.

The genealogy of songbirds has long been considered. In the present study, the cytb mitochondrial marker was used in one of the southernmost regions of its distribution in Iran to identify the lesser whitethroat subspecies (Sylvia curruca). Comparing the sequences obtained from the Qeshm Island specimens with the Gene Bank, it was found that this array in southern Iran is considered as halimodendri, which ultimately reflects the cladistic status of the lesser whitethroats of Qeshm Island in southern Hormozgan as a study area not established in Iran. Also, with a systematic molecular approach and using genealogical analysis, it was found that this subspecies had two distinct groups and haplotypes with the highest value relative to the index taxa of this species (i.e. curruca). The Qeshm Island specimens were divided into two clades due to genetic distance and phylogenic trees. The results of the study also indicated that these two clades formed in Qeshm Island had major differences, which could be linked to the separation of migration routes and breeding areas in the northern habitats.

Motacilla albahas three subspecies in Iran includingM. a. personata، M. a. persicaand M. a. dukhunensis. Thereis some evidence to support hybridization among these subspecies. In this study، we investigated morphological differences between two subspecies of White Wagtail in Iran including M. a. personata and M. a. persica. For this purpose، 17 specimens were collected from South and North East of Iran during the spring and summer of 2011، then we measured sevenprimary variables and six calculated ratios for comparison in multivariate analyses using Past program. We also compared coloration of head، forehead، crown and throat between to subspecies. T test revealed that five characteristics were significantly different between two subspecies (P<0. 05). Morphological matrices were analyzed by Principal Components Analysis (PCA) Results indicated that two subspecies are different from each other. Coloration of head، forehead، crown and throat between two subspecies is different and we could not find any evidence of hybridization between them. According to morphometric separation of the two subspecies، there was the possibility of separation of samples hybrid from samples parent the contact region based on morphometric characters.