نتایج جستجو برای: genetic diversity within species

تعداد نتایج: 2068858  

2012
Karen Lebret Emma S Kritzberg Rosa Figueroa Karin Rengefors

The field of genetic diversity in protists, particularly phytoplankton, is under expansion. However, little is known regarding variation in genetic diversity within populations over time. The aim of our study was to investigate intrapopulation genetic diversity and genetic differentiation in the freshwater bloom-forming microalga Gonyostomum semen (Raphidophyceae). The study covered a 2-year pe...

Journal: :American journal of botany 1998
J Chamberlain

Patterns of genetic diversity within and among populations of Calliandra calothyrsus, an important multipurpose tree species, were examined using isozyme analysis. C. calothyrsus is a widespread species distributed throughout Central America and southern Mexico, across a variety of environments. Morphologically and ecologically distinct populations can be identified within this range, but they ...

Journal: Mycologia Iranica 2016

Paecilomyces variotii is one of the most important causal agents of dieback disease in pistachio (Pistacia vera) gardens. The disease affects different parts of the tree, such as branch and trunk. Assessment of genetic structure in different populations of this species will lead to more useful management of pistachio dieback disease. In this study, genetic variation within samples of P. varioti...

Journal: :Molecular ecology 2013
Francesco Cicconardi Pietro P Fanciulli Brent C Emerson

Despite its ancient origin, global distribution and abundance in nearly all habitats, the class Collembola is comprised of only 8000 described species and is estimated to number no more than 50,000. Many morphologically defined species have broad geographical ranges that span continents, and recent molecular work has revealed high genetic diversity within species. However, the evolutionary sign...

Journal: :BioScience 2021

Abstract Global conservation policy and action have largely neglected protecting monitoring genetic diversity—one of the three main pillars biodiversity. Genetic diversity (diversity within species) underlies species’ adaptation survival, ecosystem resilience, societal innovation. The low priority given to has been due knowledge gaps in key areas, including importance trends change; perceived h...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2010
Paquita E A Hoeck Jennifer L Bollmer Patricia G Parker Lukas F Keller

Small and isolated island populations provide ideal systems to study the effects of limited population size, genetic drift and gene flow on genetic diversity. We assessed genetic diversity within and differentiation among 19 mockingbird populations on 15 Galápagos islands, covering all four endemic species, using 16 microsatellite loci. We tested for signs of drift and gene flow, and used histo...

H.R. Seyedabadi, K. Pahlevan Afshari M. Abdolmaleki

The genetic diversity and phylogenetic structure was analyzed in Marghoz goat population by mitochondrial DNA sequences. Phylogenetic analysis was carried out using hyper variable region 1 (968 bp) obtained form 40 animals. Marghoz goat proved to be extremely diverse (average haplotype diversity of 0.999) and the nucleotide diversity values 0.022. A total of 40 Marghoz goats were grouped into s...

2013
Jakob Kolleck Mouyu Yang Dietmar Zinner Christian Roos

To evaluate the conservation status of a species or population it is necessary to gain insight into its ecological requirements, reproduction, genetic population structure, and overall genetic diversity. In our study we examined the genetic diversity of Rhinopithecus brelichi by analyzing microsatellite data and compared them with already existing data derived from mitochondrial DNA, which reve...

2014
Wei Liu Dongxue Yin Jianjun Liu Na Li Raffaella Balestrini

Sinopodophyllum hexandrum is an important medicinal plant whose genetic diversity must be conserved because it is endangered. The Qinling Mts. are a S. hexandrum distribution area that has unique environmental features that highly affect the evolution of the species. To provide the reference data for evolutionary and conservation studies, the genetic diversity and population structure of S. hex...

Aysan Saebnazar Fatemeh Rahmani,

In this study, SRAP molecular maker approach was performed to investigate genetic diversity in the Salvia genus. A total of 205 DNA bands were produced from PCR amplification of 11 Salvia species and populations using 25 selective primer combinations, of which 204 polymorphic genetic loci accounted. The total number of amplified fragments ranged from 3 to 15. The genetic similarities of 11 coll...

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