This work was interested on the study of the morphological variability of 120 individuals of Artemisia herba-alba Asso coming from three stations in western Algeria , which was assessed through 15 quantitative and qualitative characters. Analysis of variance (ANOVA) and hierarchical cluster analysis (HCA) results showed significant morphological variability inter and intra-population. This phenotypic variability is explained by a high genetic polymorphism determined at another genetic study that we conducted in parallel on individuals of the same site using molecular markers types ISSR.This study also revealed a large variability within A. herba alba which could help investigation on a large collection of individuals and therefore select the most efficient ecotypes for re-introduction this species in steppes and highlands of Algeria.
In this work, the anatomical variability in Artemisia herba-alba Asso was studied based on 90 individuals taken from three different bioclimatic zones of Algeria (inferior semi arid, arid and Saharan) as well as the relationships of the dynamics of this variability with the distribution and adaptation of the species. The interpretation of the results of this study through the analysis of variance and the ascending hierarchical classification allowed us to detect a very high intra- and inter-specific anatomical variability, as well as the presence of a parenchyma of water reserves observed in individuals of each studied region. The existence of relationships between environmental conditions and the dynamics of anatomical variability have been established. The broad morphological structural variability thus determined and the genetic variability observed concur well with the results of our two other previous studies. This anatomical polymorphism could help in the selection of the most effective ecotypes to restore this species in degraded steppe ecosystems of Algeria and North Africa. Thus, this choice will allow us to keep their seeds in a bank of grains in order to preserve the species for possible future use.
Background: Artemisia herba alba is an aromatic species very rich in secondary metabolites that can be used in traditional medicine. The context and purpose of the study: This species suffers from the degradation of its natural habitat. The creation of collections containing diverse ecotypes is important for its preservation. This species contains essential oils which limit the extraction of DNA. The objective of this study is to optimize the DNA extraction and PCR conditions. The method will be used to evaluate the genetic diversity of Artemisia herba alba in the highlands of Western Algeria as a starting point. Results and main findings: The use of different reagents and the modification of the incubation time allow obtaining white and clear DNA. Moreover, the modification of temperature and duration of hybridization results in clearer ISSR profiles. The use of the genetic markers for the analysis of genetic material ISSR, carried out on 12 individuals, indicates that A. herba alba is characterized by a broad genetic polymorphism. Conclusions: This study permits the optimization of protocol of DNA extraction and amplification by PCR for A. herba alba. Large variability was found between the studied individuals for A. herba alba. The developed markers could be used for screening a large collection of individuals. Brief summary: Artemisia herba alba is a popular medicine plant in North Africa. This plant shows a degradation of its natural habitat. It is necessary to constitute a collection in order to reintroduce it in the highlands of North Africa. For this purpose the genetic characterization is obviously important. Nevertheless, no information is available on this species. Moreover, its essential oils limit markedly the DNA extraction. This study aimed the optimization of DNA extraction and PCR conditions. The results showed, by using different reagents and both time and temperature of incubation, a clearer DNA and ISSR markers profiles. This study also revealed a large variability within A. herba alba which could help investigation on a large collection of individuals and therefore select the most efficient ecotypes for re-introduction this species in highlands of Algeria. Nevertheless, these actions require a good knowledge of the genetic diversity of A. herba-alba. There are no information concerning the use of molecular markers for the study of A herba alba genetic variability. This work was interested in the study of intraspecific genetic diversity of A. herba-alba by using inter simple sequence repeat (ISSR-PCR) technique. Material and Methods Presentation of the study area Our study sites known as El-Manseb (Altitude 1326m) are located in the highlands of the South East of the province of Tiaret (001° 48' 40.8'' E, 35° 01' 19.2'' N) in the North West of Algeria. The soil in this area is shallow and rocky or stony part, with generally calcareous-lime nature. Annual rainfall reaches 330mm; the range of temperatures varies between 2.5°C (cold season) and 35°C (warm season). The dry season took places durin...
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