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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Population Structure And Conservation Genetics Of The Oregon Spotted Frog, Rana Pretiosa, Michael S. Blouin, Ivan C. Phillipsen, Kirsten Monsen
Population Structure And Conservation Genetics Of The Oregon Spotted Frog, Rana Pretiosa, Michael S. Blouin, Ivan C. Phillipsen, Kirsten Monsen
Department of Biology Faculty Scholarship and Creative Works
The Oregon spotted frog (Rana pretiosa) is one of the most threatened amphibians in the Pacific Northwest. Here we analyzed data from 13 microsatellite loci and 298 bp of mitochondrial DNA in frogs collected from 23 of the remaining R. pretiosa populations in order to (1) assess levels of genetic diversity within populations of R. pretiosa, (2) identify the major genetic groups in the species, (3) estimate levels of genetic differentiation and gene flow among populations within each major group, and (4) compare the pattern of differentiation among R. pretiosa populations with that among populations of R. cascadae, a non-endangered …
Barcoding Of Arrow Worms (Phylum Chaetognatha) From Three Oceans: Genetic Diversity And Evolution Within An Enigmatic Phylum, Robert M. Jennings, Ann Bucklin, Annelies Pierrot-Bults
Barcoding Of Arrow Worms (Phylum Chaetognatha) From Three Oceans: Genetic Diversity And Evolution Within An Enigmatic Phylum, Robert M. Jennings, Ann Bucklin, Annelies Pierrot-Bults
Biology Faculty Publication Series
Arrow worms (Phylum Chaetognatha) are abundant planktonic organisms and important predators in many food webs; yet, the classification and evolutionary relationships among chaetognath species remain poorly understood. A seemingly simple body plan is underlain by subtle variation in morphological details, obscuring the affinities of species within the phylum. Many species achieve near global distributions, spanning the same latitudinal bands in all ocean basins, while others present disjunct ranges, in some cases with the same species apparently found at both poles. To better understand how these complex evolutionary and geographic variables are reflected in the species makeup of chaetognaths, we analyze …
From The Valleys To The Mountains: The Biographic History Of Antelope Squirrels, Bats, And Chipmunks In Western North America, Stacy James Mantooth
From The Valleys To The Mountains: The Biographic History Of Antelope Squirrels, Bats, And Chipmunks In Western North America, Stacy James Mantooth
UNLV Theses, Dissertations, Professional Papers, and Capstones
Genetic differentiation within and between species often coincides with significant geological or climatic changes that have shaped the sizes and locations of their geographic ranges and altered the connectivity between populations over time. Across western North America, many endemic taxa experienced high levels of initial divergence associated with geological transformations of the Neogene, with subsequent diversification and geographic structuring of populations associated with climatic changes during the Quaternary. As such, we can use a combination of molecular markers and genetic analyses to effectively examine the evolutionary and biogeographic histories of populations, species, and regional biotas whose signatures of differentiation are …
Genetic Diversity And Reproductive Biology In Warea Carteri (Brassicaceae), A Narrowly Endemic Florida Scrub Annual, Margaret E.K. Evans, Rebecca W. Dolan, Eric S. Menges, Doria R. Gordon
Genetic Diversity And Reproductive Biology In Warea Carteri (Brassicaceae), A Narrowly Endemic Florida Scrub Annual, Margaret E.K. Evans, Rebecca W. Dolan, Eric S. Menges, Doria R. Gordon
Rebecca W. Dolan
Carter's mustard (Warea carteri) is an endangered, fire-stimulated annual endemic of the Lake Wales Ridge, Florida, USA. This species is characterized by seed banks and large fluctuations in plant numbers, with increases occurring in postdisturbance habitat. We investigated the mating system, patterns of isozyme variation, and effective population sizes of W. carteri to better understand its population biology and to comment on reserve designs and management proposals relevant to this species. Warea carteri is self-compatible and autogamous, and probably largely selfing. Measures of genetic variation in W. carteri were lower than values reported for species with similar ecological and life …
Zostera Marina Population Genetics In Barnegat Bay, New Jersey, And Implications For Grass Bed Restoration, James Campanella, Paul Bologna, Stephanie M. Smith, Eric B. Rosenzweig, John V. Smalley
Zostera Marina Population Genetics In Barnegat Bay, New Jersey, And Implications For Grass Bed Restoration, James Campanella, Paul Bologna, Stephanie M. Smith, Eric B. Rosenzweig, John V. Smalley
Department of Biology Faculty Scholarship and Creative Works
Within Barnegat Bay, New Jersey, Zostera marina populations have declined by 62% over the last 20 years, and restoration efforts have met with mixed success. We have completed a microsatellite-based genetic investigation of eight populations of Z. marina within Barnegat Bay to determine whether the genetic stock origins of the plants used in management projects may affect restoration success. Additionally, we assessed the genetic diversity of Z. marina in Barnegat Bay to better understand its population structure. Clonal diversity ranged from 0.70 to 0.95 for the populations studied. Individually, Barnegat Bay populations are not genetically diverse, and there is also …
Genetic Diversity In Doubled Haploid Wheat According To The Acid-Page Method, Morphological Traits, And Baking Quality, Javid Ojaghi, Ellada Akhundova
Genetic Diversity In Doubled Haploid Wheat According To The Acid-Page Method, Morphological Traits, And Baking Quality, Javid Ojaghi, Ellada Akhundova
Turkish Journal of Biology
This study aimed to assess the genetic diversity of 102 lines of doubled haploid wheat (obtained from CIMMYT) using the acid-PAGE method, morphological traits, and baking quality. Cluster analysis of the morphological traits separated all the genotypes into 4 groups, such that the genotypes with high yield were placed in 1 group. However, based on cluster analysis of their qualitative traits, the genotypes were classified into 3 main groups, while the genotypes with high protein content were placed in a distinct group. In all, 48 bands and 47 patterns were observed in the 102 lines studied, and polymorphism was observed …
Barley Germplasms Developed For Scald Disease Resistance Exhibited A High Level Of Genetic Diversity Based On Srap Markers, Ayten Di̇zkirici, Zeki̇ Kaya, H. Eli̇f Güren, Hi̇kmet Budak
Barley Germplasms Developed For Scald Disease Resistance Exhibited A High Level Of Genetic Diversity Based On Srap Markers, Ayten Di̇zkirici, Zeki̇ Kaya, H. Eli̇f Güren, Hi̇kmet Budak
Turkish Journal of Biology
The objective of this study was to assess the genetic diversity and genetic relationships among 59 Turkish barley (Hordeum vulgare L.) germplasm lines (maintained for scald disease resistance breeding) using sequence-related amplified polymorphism (SRAP) markers. Seventeen SRAP primer combinations produced 83 polymorphic markers, with a mean polymorphism of 73.5%. The dendrogram created based on Nei's unweighted-pair group method using arithmetic average (UPGMA) indicated that there were 4 main clusters, which was supported by principle component analysis (PCA). Cluster I primarily included only scald-resistant germplasm lines, while clusters III and IV consisted of only scald-sensitive lines, but cluster II had both …