نتایج جستجو برای: trnh psba
تعداد نتایج: 745 فیلتر نتایج به سال:
BACKGROUND Widespread uptake of DNA barcoding technology for vascular plants has been slow due to the relatively poor resolution of species discrimination (∼70%) and low sequencing and amplification success of one of the two official barcoding loci, matK. Studies to date have mostly focused on finding a solution to these intrinsic limitations of the markers, rather than posing questions that ca...
The genus Fritillaria comprises of 165 taxa of medicinal, ornamental and horticultural importance. Evolutionary relationships in this genus is an interesting research area, attracting many researchers. In this study, phylogenetic relationships among 18 native to endemic species in Iran belonging to four subgenera Petilium, Theresia, Rhinopetalum and Fritillaria, are assessed using chloroplast t...
AIM To examine the phylogeography of Ficus insipida subsp. insipida in order to investigate patterns of spatial genetic structure across the Neotropics and within Amazonia. LOCATION Neotropics. METHODS Plastid DNA (trnH-psbA; 410 individuals from 54 populations) and nuclear ribosomal internal transcribed spacer (ITS; 85 individuals from 27 populations) sequences were sampled from Mexico to ...
BACKGROUND DNA barcoding is expected to be an effective identification tool for organisms with heteromorphic generations such as pteridophytes, which possess a morphologically simple gametophyte generation. Although a reference data set including complete coverage of the target local flora/fauna is necessary for accurate identification, DNA barcode studies including such rich taxonomic sampling...
the genus fritillaria comprises of 165 taxa of medicinal, ornamental and horticultural importance. evolutionary relationships in this genus is an interesting research area, attracting many researchers. in this study, phylogenetic relationships among 18 native to endemic species in iran belonging to four subgenera petilium, theresia, rhinopetalum and fritillaria, are assessed using chloroplast t...
شاه بلوط اروپایی (castanea sativa mill.) یکی از گونه های ارزشمند در خطر جنگلهای هیرکانی است. در این تحقیق، استفاده از نشانگرهای مولکولی به عنوان روشی آسان و سریع برای شناسایی جایگاه تاکسونومیکی شاه بلوطهای شمال ایران مورد استفاده قرار گرفت. در این تحقیق، از تمامی رویشگاههای این گونه در ایران (سه رویشگاه ذکر شده در بخش غربی استان گیلان) نمونه برگ تهیه و بعد از بیومتری، شش پایه انتخاب و ناحیه ...
Background. A useful DNA barcode requires sufficient sequence variation to distinguish between species and ease of application across a broad range of taxa. Discovery of a DNA barcode for land plants has been limited by intrinsically lower rates of sequence evolution in plant genomes than that observed in animals. This low rate has complicated the trade-off in finding a locus that is universal ...
BACKGROUND DNA barcoding is a technique used to identify species based on species-specific differences in short regions of their DNA. It is widely used in species discrimination of medicinal plants and traditional medicines. MATERIALS AND METHODS In the present study, four potential DNA barcodes, namely rbcL, matK, trnH-psbA and ITS (nuclear ribosomal internal transcribed spacer) were adopted...
To determine how well DNA barcodes from the chloroplast region perform in forest dynamics plots (FDPs) from global CTFS-ForestGEO network, we analyzed DNA barcoding sequences of 1277 plant species from a wide phylogenetic range (3 FDPs in tropics, 5 in subtropics and 5 in temperate zone) and compared the rates of species discrimination (RSD). We quantified RSD by two DNA barcode combinations (r...
BACKGROUND A useful DNA barcode requires sufficient sequence variation to distinguish between species and ease of application across a broad range of taxa. Discovery of a DNA barcode for land plants has been limited by intrinsically lower rates of sequence evolution in plant genomes than that observed in animals. This low rate has complicated the trade-off in finding a locus that is universal a...
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