SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Cleary, Daniel F.R.; Descimon, Henri; Menken, Steph B.J..

Clear habitat separation between the sister species Colias alfacariensis and C. hyale is shown when occurring sympatrically. Colias hyale is found more often in moist cultivated pastures while Colias alfacariensis is more abundant in dry uncultivated habitat. Out of a total of 16 loci, no diagnostic loci were found between C. alfacariensis and C. hyale, and both species shared most major polymorphisms. Exceptions were the marked differences in allele frequencies at the HK locus and only C, hyale, but not C. alfacariensis was further invariable at the GOT2 locus, which is usually highly polymorphic in the Pieridae. Colias hyale has a significantly lower level of heterozygosity than its sister species C. alfacariensis. In Colias alfacariensis heterozygosity...

Morphological and allozyme studies of midwife toads (genus Alytes), including the description of two new taxa from Spain

Palavras-chave: Lepidoptera; Pieridae; Allozymes; Population structure; Gene flow.

Ano: 2002

URL: http://www.repository.naturalis.nl/record/534385

Arntzen, J.W.; García-París, M..

Allozyme variation in 31 to 50 presumptive loci of 12 populations of European midwife toads of the genus Alytes show appreciable genetic divergences (DiNe from 0.29 to 0.72) among four groups. These groups correspond to A. cisternasii Boscá, 1879, A. obstetricans (Laurenti, 1768), A. muletensis (Sanchiz & Adrover, 1979), and a new species from the Betic mountains described here as A. dickhilleni n. sp. Smaller divergences among geographic groups of populations of A. obstetricans (up to DNei = 0.17) support the existence of three geographic units in Europe corresponding to the previously recognized subspecies A. o. obstetricans and A. o. boscai Lataste, 1879, plus a third one described here under the designation of A. o. almogavarii n. ssp. The analysis...

How complex is the Bufo bufo species group?

Palavras-chave: Allozymes; Alytes; Midwife toads; Morphometry; Spain; Taxonomy.

Ano: 1995

URL: http://www.repository.naturalis.nl/record/504393

Arntzen, J.W.; Recuero, E.; Canestrelli, D.; Martínez-Solano, I..

Species delineation remains one of the most challenging tasks in the study of biodiversity, mostly owing to the application of different species concepts, which results in contrasting taxonomic arrangements. This has important practical consequences, since species are basic units in fields like ecology and conservation biology. We here review molecular genetic evidence relevant to the systematics of toads in the Bufo bufo species group (Anura, Bufonidae). Two studies recently published in this journal (Recuero et al., MPE 62: 71–86 and Garci´a-Porta et al., MPE 63: 113–130) addressed this issue but reached opposing conclusions on the taxonomy of the group (four versus two species). In particular, allozyme data in the latter paper were interpreted as...

The phylogeny of crested newts (Triturus cristatus superspecies): nuclear and mitochondrial genetic characters suggest a hard polytomy, in line with the paleogeography of the centre of origin

Palavras-chave: Bufo bufo; Bufo spinosus; Molecular systematics; Bufo verrucosissimus; Phylogeny; Allozymes; 42.82.

Ano: 2013

URL: http://www.repository.naturalis.nl/record/470065

Arntzen, J.W.; Themudo, G. Espregueira; Wielstra, B..

Newts of the genus Triturus (Amphibia, Caudata, Salamandridae) are distributed across Europe and adjacent Asia. In spite of its prominence as a model system for evolutionary research, the phylogeny of Triturus has remained incompletely solved. Our aim was to rectify this situation, to which we employed nuclear encoded proteins (40 loci) and mitochondrial DNA-sequence data (mtDNA, 642 bp of the ND4 gene). We sampled up to four populations per species covering large parts of their ranges. Allozyme and mtDNA data were analyzed separately with parsimony, distance, likelihood and Bayesian methods of phylogenetic inference. Existing knowledge on taxonomic relationships was confirmed, including the monophyly of the genus and the groups of crested newts (four...

Phenotypic plasticity revealed by molecular studies on reef corals of Fungia (Cycloseris) spp. (Scleractinia: Fungiidae) near river outlets

Palavras-chave: Allozymes; Historical biogeography; Mitochondrial DNA-sequences; Triturus macedonicus; Triturus marmoratus; Vicariance; 42.82.

Ano: 2007

URL: http://www.repository.naturalis.nl/record/262648

Gittenberger, A.; Hoeksema, B.W..

On a patch reef off Makassar, Sulawesi, Indonesia, corals identified as Fungia (Cycloseris) costulata, Fungia (Cycloseris) tenuis and Fungia (Cycloseris) cf costulata were collected down to a maximum depth of 10 m. The corals lived sympatrically. Mushroom coral clones resulting from fragmentation can be recognized by their equal coloration and close proximity. Therefore, to ensure that no clones were collected, corals of dissimilar colors were selected at a mutual distance of 5 m. The corals were kept alive in two 30 liter sea-water aquariums with an air-pump. They were photographed in detail. Using allozyme electrophoresis in a laboratory close to the field area, it was tested whether the separate coral morphs should be considered three species....

Genetic variability in four samples of Neoplecostomus yapo (Teleostei: Loricariidae) from the rio Paranapanema basin, Brazil

Palavras-chave: Eco-phenotype; Plasticity; Allozymes; River outlets; Mushroom corals; Fungiidae; Cycloseris; Indonesia; 42.79.

Ano: 2006

URL: http://www.repository.naturalis.nl/record/214568

Neotropical Ichthyology

Philippsen,Juliana S.; Renesto,Erasmo; Gealh,Ana Maria; Artoni,Roberto F.; Shibatta,Oscar A.; Zawadzki,Claudio H..

Four samples of Neoplecostomus yapo were analyzed through the allozyme electrophoresis technique in corn starch gel. The allozyme pattern was similar to those found in N. paranensis with 24 loci scored. Two samples (ribeirão Atlântico and ribeirão Uraí) showed monomorphic bands for all 24 loci, whereas the other two (rio Verde and rio Fortaleza) showed 8.3% of polymorphic loci. The He genetic variability estimates for the rios Verde and Fortaleza populations were 0.0195 and 0.0179, respectively, too much inferior to the mean heterozygosity summed to species from the whole world (0.051). The Wright statistical values F IS = 0.5181, F IT = 0.5681 and F ST = 0.1039 and the genetic distance of Nei values showed that the four samples are genetically very...

Etude de la structure génétique des populations de la tortue marine Caretta caretta dans les eaux tunisiennes.

Palavras-chave: Allozymes; Genetic variation; Neoplecostominae; Neotropical fishes; Siluriformes.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100004

OceanDocs

Chaieb, O..

La tortue marine, la caouanne (Caretta caretta), est une espèce en danger d’extinction. Elle est caractérisée par un cycle biologique complexe se basant sur une série de transitions écologiques et géographiques nécessitant des migrations sur de longues distances. En Tunisie, plusieurs études ont été réalisées sur les activités de nidification et les interactions avec les activités de pêche, mais, aucune n’a porté sur l’étude génétique de cette espèce. Dans ce travail, nous nous sommes intéressés à l’analyse génétique de la population nidifiante en Tunisie et des populations des tortues se développant dans les zones néritiques tunisiennes. La population nidifiante a été appréhendée par l’analyse des nouveau-nés échantillonnés durant une période de sept ans...

Tipo: Theses and Dissertations

Palavras-chave: Allozymes; DNA; Genetic diversity; Neritic province.

Ano: 2013

URL: http://hdl.handle.net/1834/5923

Variabilité génétique entre les classes d'âge chez le pageot commun (Pagellus erythrinus, Sparidae) des côtes nord Tunisiennes

OceanDocs

Fassatoui, Ch.; Romdhane, M.S..

La variabilité génétique entre les classes d’âge du pageot commun, Pagellus erythrinus (Linnaeus, 1758 ; Sparidae) a été appréhendée par une analyse isoenzymatique. L’étude aà été portée sur 251 spécimens des côtes Nord de la Tunisie. L’âge des poissons a été estimé indirectement par analyse otolithométrique. Les quatorze systèmes enzymatiques utilisés sont codés par 21 loci dont 10 sont polymorphes au seuil de 99%. Le taux d’hétérozygotie attendu non biaisé moyen (Hnb = 0,048) est comparable à celui rapporté chez les espèces ichtyologiques, notamment les Sparidés. La vérification de l’équilibre de Hardy-Weinberg montre un écart significatif à la panmixie dans le sens d’un déficit en Hétérozygotes (FIS = 0,116, p < 0,001). L’indice de diversité...

Tipo: Journal Contribution

Palavras-chave: Genetic variation; Allozymes; Seabream fisheries.

Ano: 2010

URL: http://hdl.handle.net/1834/4689

International study on Artemia : LX. Allozyme data suggest that a new Artemia population in southern Chile (50° 29' S; 73° 45' W) is A. persimilis

OMA

Gajardo, G.; Mercado, C.; Beardmore, J.A.; Sorgeloos, P..

An Artemia population from a site recently described in Chile and located in a semi-arid and humid hydrographical zone (Torres del Paine National Park), was electrophoretically characterized and cross-bred (followed through F3) to reference samples of A. franciscana (San Francisco Bay, California, USA) and A. persimilis (Buenos Aires, Argentina), which are the species most likely to be found in Chile. The population exhibited high levels of genetic variability as judged by the percentage of polymorphic loci (P=53.3), mean number of alleles per locus (n=2.2) and mean heterozygosity (H=0.176). Based on...

Spatial genetic structure within natural populations of Machaerium villosum Vog. (Leguminosae) at Moji-Guaçu region, SP, Brazil

Palavras-chave: Allopatric populations; Allozymes; Genetic isolation; Hybridization; Population genetics; Chile.

Ano: 1999

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4016

Rev. Bras. Bot.

GIUDICE NETO,JOÃO DEL; KAGEYAMA,PAULO YOSHIO.

A spatial autocorrelation study of enzyme loci detected by starch gel electrophoresis was performed to verify the occurrence of spatial genetic structure within two natural populations of Machaerium villosum Vog. The sampled populations were termed "Antropic Model (MA)" and "Natural Model (MN)" and they are situated in Campininha Farm areas, at Moji-Guaçu municipality, 22°10'43''-22°18'19'' S and 47°8'5"-47°11'34" W, in the state of São Paulo. Ten polymorphic loci in the MA population and nine polymorphic loci in the MN population were assessed by Moran's I autocorrelation statistic. No spatial autocorrelation was detected among individuals within sampled populations. Results are in line with other studies in woody species from tropical rain forest.

Comparative genetic structure in pines: evolutionary and conservation consequences

Palavras-chave: Machaerium villosum; Allozymes; Spatial autocorrelation.

Ano: 2000

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000200010

RChHN

DELGADO,PATRICIA; CUENCA,ARGELIA; ESCALANTE,ANA E.; MOLINA-FREANER,FRANCISCO; PIÑERO,DANIEL.

Pines have been the focus of several studies that estimate population genetic parameters using both allozymes and chloroplast single sequence repeats (SSRs). Also, the genus has also been recently studied using molecular systematics so that we now have a more clear understanding of their evolutionary history. With this background we studied comparatively the genetic structure in pines. Expected heterozygosity is particularly constant with a 99 % confidence interval between 0.19 and 0.23 in species that have been studied until now using allozymes. There is a significant proportion of species (9/41) that show high population differentiation estimates (Fst = or larger than 0.15) and five of these have large and wingless seeds probably associated with low...

Tipo: Journal article

Palavras-chave: Pinus; Genetic structure; Outcrossing rates; Microsatellites; Allozymes.

Ano: 2002

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100004

Genetic differentiation of the neotropical tree species Protium spruceanum (Benth.) Engler (Burseraceae) between fragments and vegetation corridors in Brazilian Atlantic forest

Acta Botanica

Vieira,Fábio de Almeida; Carvalho,Dulcinéia de.

We studied patterns of genetic differentiation in a connected landscape with an interesting history of human habitat conversion that began two centuries ago, during the Brazilian colonization period. In the fragments of Brazilian Atlantic seasonal forest and corridors of secondary forest, Protium spruceanum is an abundant native, mass-flowering/insect-pollinated and bird-dispersed tree. Genetic diversity was analyzed from 230 individuals in five fragments (1 to 11.8 ha) and four corridors (460 to 1000 m length) using allozyme loci. We did not find evidence of inbreeding within fragments or corridors, but the proportion of heterozygotes (<IMG SRC="/img/revistas/abb/v23n4/a28simb1.gif" WIDTH=287 HEIGHT=96>) were significantly higher in fragments than...

Genetic variability and evidence of founder effect in Hemiodus orthonops (Characiformes: Hemiodontidae) from the upper Paraná River basin, Brazil

Palavras-chave: Allozymes; F-statistics; Genetic diversity; Habitat fragmentation.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000400028

Biological Sciences

Marques, Liégie Alher; Renesto, Erasmo.

Hemiodus orthonops is a small fish of the Hemiodontidae family, order Characiformes, with a maximum of 25 cm standard length. Until recently, H. orthonops was an endemic species from the Paraná-Paraguay basin and it was absent from the upper Paraná River basin. Since 2008, it has started to be collected in the upper Paraná River, representing up to 10% of catches. Two population samples of H. orthonops from two localities of the upper Parana River basin (Porto Camargo and Porto Figueira) were analyzed using the allozymes electrophoresis technique. Twenty-one enzymatic loci were detected. The population sample from Porto Camargo displayed a genetic variability (He = 0.1061) higher than that from Porto Figueira (He = 0.0580) and homozygote excess in both of...

Molecular research and the control of Chagas disease vectors

Palavras-chave: Allozymes; Fish; Genetic distance; Heterozygosity; Protein polymorphism. genética de populações.

Ano: 2017

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31793

Anais da ABC (AABC)

Abad-Franch,Fernando; Monteiro,Fernando A..

Chagas disease control initiatives are yielding promising results. Molecular research has helped successful programs by identifying and characterizing introduced vector populations and by defining intervention targets accurately. However, researchers and health officials are facing new challenges throughout Latin America. Native vectors persistently reinfest insecticide-treated households, and sylvatic triatomines maintain disease transmission in humid forest regions (including Amazonia) without colonizing human dwellings. In these scenarios, fine-scale vector studies are essential to define epidemiological risk patterns and clarify the involvement of little-known triatomine taxa in disease transmission. These eco-epidemiological investigations, as well as...

Genetic structure of natural populations of Cryptocarya moschata Nees (Lauraceae) from southeastern Brazilian Atlantic rain forest

Palavras-chave: Molecular systematics; DNA; Allozymes; Triatominae; Chagas disease.

Ano: 2005

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000300007

Biota Neotropica

Moraes,Pedro Luís Rodrigues de; Derbyshire,Maria Teresa Vitral de Carvalho.

This study was accomplished on a more comprehensive basis to evaluate previous questions that were raised from a preliminary article about the genetic structure of Cryptocarya moschata populations. Thus, through the analysis of 40 polymorphic allozyme loci, allele frequencies were estimated from 335 individuals of 11 natural populations of C. moschata from six hydrographic basins of São Paulo state and Serra da Estrela, Rio de Janeiro, Brazil. Estimates of Wright's F statistics were done through the analysis of variance, presenting average values of <img border=0 width=32 height=32 id="_x0000_i1026" src="../../../../../../img/revistas/bn/v4n1/img/a04car(f).jpg" align=absmiddle > or = 0.352, <img border=0 width=32 height=32 id="_x0000_i1027"...