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

Ruiz-García,Manuel; Alvarez,Diana.

We used nine morphological genes to analyze cat populations from Mexico, the Dominican Republic, the Colombian, Brazilian and Peruvian Amazon, Bolivia and Brazil. Most populations were in Hardy-Weinberg equilibrium at the O locus. The highest allele frequencies so far detected at world level for alleles I (inhibitor) and L (long hair) were found at La Paz (Bolivia). The analyses revealed at least five cat gene pools in Latin America: These findings suggest that the current genetic distribution of cats in Latin America correlates with the colonization of the Americas during the XIV to XVIII centuries. Additionally, the cat populations of São Paulo, Rio de Janeiro and Manaus were sampled, to compare their 1996-2003 genetic profiles with those obtained in...

A conservation genetic study of Rafflesia speciosa (Rafflesiaceae): patterns of genetic diversity and differentiation within and between islands

Palavras-chave: Domestic cats; Latin American cats; Population genetics; Genetic changes.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000400026

Naturalis

Pelser, P.B.; Nickrent, D.L.; Barcelona, J.F..

Rafflesia speciosa is a threatened endo-holoparasitic species. It has several populations in the Central Panay Mountain Range (CPMR) of Panay island and a single population on Negros Island. Because R. speciosa is the only Philippine species of the genus that is not endemic to an individual island, it is a suitable species for improving our understanding of the factors underlying the high island endemism of Philippine Rafflesia. For this purpose and to inform the conservation management of R. speciosa, patterns of genetic diversity and differentiation were studied using 15 microsatellite loci and samples from nine populations. None of these populations shows evidence of inbreeding and R. speciosa has similar levels of heterozygosity as generally observed...

Tipo: Article / Letter to the editor

Palavras-chave: Microsatellites; Conservation; Negros; Panay; Philippines; Population genetics.

Ano: 2018

URL: http://www.repository.naturalis.nl/record/655789

A note on the population genetic consequences of delayed larval development in insects

Salles,Marcos Mattoso de; Otto,Paulo A..

Observations by Dobzhansky's group in the 1940s suggesting that the presence of recessive genotypes could account for lower larval developmental rates in Drosophila melanogaster were not confirmed at the time and all subsequent investigations on this subject focused on the analysis of ecological models based on competition among pre-adult individuals. However, a paper published in this journal in 1991 eventually confirmed the finding made by Dobzhansky and his co-workers. In this report, we provide a theoretical analysis of the population genetic effects of a delay in the rate of larval development produced by such a genetic mechanism.

AFLP marker analysis revealing genetic structure of the tree Parapiptadenia rigida (Benth.) Brenan (Leguminosae-Mimosoideae) in the southern Brazilian Tropical Rainforest

Palavras-chave: Difference and differential equations; Drosophila; Dynamic systems; Larval development; Population genetics.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300019

Souza,Laís Bérgamo de; Ruas,Eduardo A.; Rodrigues,Luana A.; Ruas,Claudete F.; Ruas,Paulo M..

Parapiptadenia rigida is a tropical early secondary succession tree characteristic of the Tropical Atlantic Rainforest. This species is of great ecological importance in the recovery of degraded areas. In this study we investigated the variability and population genetic structure of eight populations of P. rigida. Five AFLP primer combinations were used in a sample of 159 individuals representing these eight populations, rendering a total of 126 polymorphic fragments. The averages of percentage of polymorphic loci, gene diversity, and Shannon index were 60.45%, 0.217, and 0.322, respectively. A significant correlation between the population genetic variability and the population sizes was observed. The genetic variability within populations (72.20%) was...

Aislamiento de Microsatélites y flujo Genético en Dosidicus Gigas (D'Orbigny, 1835) entre el Golfo de California y La Costa Occidental de La Península de Baja California, México

Palavras-chave: Tropical tree; Genetic diversity; Population genetics; Conservation; AFLP.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400012

OceanDocs

Millán, A.M..

El calamar gigante, Dosidicus gigas (D'Orbigny, 1835) es una especie semioceánica y nerítica endémica del Pacífico Oriental, distribuida desde el norte de California E.U.A (43º N) hasta el sur de Chile (20°S), incluyendo el Golfo de California. Habita aguas desde la superficie hasta 1000 metros de profundad. Particularmente dentro del Golfo de California (México), es considerado uno de los recursos pesqueros más importantes, sin embargo el manejo de la pesquería de éste cefalópodo enfrenta varias dificultades entre las que se encuentran: un corto ciclo de vida, tasa de crecimiento desigual y falta de caracteres morfométricos y/o merísticos debido a la extrema plasticidad morfológica. Con el fin de determinar si existe estructura genética poblacional en D....

Tipo: Theses and Dissertations

Palavras-chave: Genetic isolation; Cephalopod fisheries; Population genetics; Population genetics; Http://aims.fao.org/aos/agrovoc/c_34326.

Ano: 2010

URL: http://hdl.handle.net/1834/3657

Allozymic variation and differentiation in the chilean blue mussel, Mytilus chilensis, along its natural distribution

Toro,Jorge E.; Castro,Grace C.; Ojeda,Johana A.; Vergara,Ana M..

Genetic differentiation in the Chilean blue mussel Mytilus chilensis (Hupé 1854) was investigated based on the variation in the allozyme frequencies of Pgm, Gpi, Icd, Me, Gsr, Lap and Pep in eight samples collected along 1800 km from Arauco (VIII Region) to Punta Arenas (XII Region). Despite the large geographic separations, values of Neis unbiased genetic distance, D (0.004-0.048) and standardised genetic variation among populations, Fst (0.011-0.055) were small. The levels of gene flow (Nm = 8) found in this study prevent the effect of differentiation among populations by genetic drift. This findings indicate that its long-lived planktotrophic larvae provides this species with considerable dispersal ability throughout its range which is favoured by the...

Łeghágots'enetę (learning together): the importance of indigenous perspectives in the identification of biological variation

Palavras-chave: Allozyme; Mytilus chilensis; Population genetics; Gene flow; Chile.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100031

Ecology and Society

Polfus, Jean L.; Natural Resources Institute, University of Manitoba, Winnipeg, Manitoba, Canada; jeanpolfus@gmail.com; Manseau, Micheline; Office of the Chief Ecosystem Scientist, Parks Canada, Gatineau, Québec, Canada; Natural Resources Institute, University of Manitoba, Winnipeg, Manitoba, Canada; Micheline.Manseau@pc.gc.ca; Bayha, Walter; Délı̨nę Land Corporation, Délı̨nę, Northwest Territories, Canada; nihtla321@gmail.com; Rice, Keren; Department of Linguistics, University of Toronto, Toronto, Ontario, Canada; rice@chass.utoronto.ca; Wilson, Paul; Biology Department, Trent University, Peterborough, Ontario, Canada; pawilson@trentu.ca.

Tipo: Peer-Reviewed Reports

Palavras-chave: Aboriginal; Biocultural diversity; Biodiversity; Caribou; Collaborative research; Ecology; First Nation; Genetic variation; Indigenous communities; Population genetics; Population structure; Rangifer tarandus; Resource management; Social-ecological systems; Traditional knowledge.

Ano: 2016

Amplification of microsatellites in two haemulid species (Haemulon aurolineatum and Haemulon steindachneri)

Boletín de Investigaciones

Pabón Quintero,Paula E.; Tavera,José Julián; Millán-Márquez,Ana María; Acero P,Arturo.

ABSTRACT Genetic-population studies in marine fish have allowed to study patterns of dispersal and connectivity between habitats. One important tool in population genetics is the use of microsatellite molecular markers. Cross-amplification of microsatellite is a method that consists in using primers designed for one species in a different one but phylogenetically related. Because of the importance of genetic studies of populations in artisanal fisheries species, primers were evaluated and designed for the species Haemulon aurolineatum and Haemulon steindachneri. Samples were collected from the artisanal fisheries in Baru-Colombia. Amplification was standardized for 12 microsatellites which ten were polymorphic for H. aurolineatum and nine for H....

URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612018000100151

Palavras-chave: Haemulidae; Grunts; Primers; Polymorphism; Population genetics.

Ano: 2018

An Integrated Biomarker Approach Using Flounder to Improve Chemical Risk Assessments in the Heavily Polluted Seine Estuary

Analyse genetique et physiologique des interactions hote-parasite: le systeme prosorhynchus squamatus - Mytilus

Borcier, Elodie; Charrier, Gregory; Couteau, Jérôme; Maillet, Géraldine; Le Grand, Fabienne; Bideau, Antoine; Waeles, Mathieu; Le Floch, Stephane; Amara, Rachid; Pichereau, Vianney; Laroche, Jean.

The objective of this study was to develop an integrative approach in ecotoxicology (from biomarkers to population genetics) to assess the ecological status of fish populations. Flounders (Platichthys flesus) collected after the spawning season in the heavily polluted Seine estuary were compared with the moderately polluted Bay of Douarnenez. The muscle energetic reserves were highly depleted in Seine vs. Douarnenez fish. The Seine fish displaying a reduced capacity to manage the oxidative stress and a higher energetic metabolism. An increase in the content of muscle membrane phospholipids (sphingomyelin, phosphatidylserine, free sterols) was detected in the Seine vs. Douarnenez fish. The data integration allowed to hypothesize relationships between...

Tipo: Text

Palavras-chave: Platichthys flesus; Estuaries; Biomarkers; Bioenergetics; Polar lipids; Population genetics.

Ano: 2020

URL: https://archimer.ifremer.fr/doc/00658/76981/78238.pdf

Analysis of propagule pressure and genetic diversity in the invasibility of a freshwater apex predator: the peacock bass (genus Cichla)

Coustau, Christine.

Tipo: Text

Palavras-chave: Mytilidae; Prosorhynchus squatamus; Host oreferences; Population genetics; Physiology; Parasitic diseases; Mytilus.

Ano: 1991

URL: http://archimer.ifremer.fr/doc/1991/these-1571.pdf

Neotropical Ichthyology

Carvalho,Daniel C.; Oliveira,Denise A. A.; Sampaio,Iracilda; Beheregaray,Luciano B..

An important step in invasive biology is to assess biological variables that could be used to predict invasion success. The study of genetics, evolution, and interactions of invasive and native species in invaded ranges provides a unique opportunity to study processes in population genetics and the capability of a species' range expansion. Here, we used information from microsatellite DNA markers to test if genetic variation relates to propagule pressure in the successful invasion of an apex predator (the Amazonian cichlid Cichla) into Southeastern Brazilian River systems. Invasive populations of Cichla have negatively impacted many freshwater communities in Southeastern Brazil since the 1960s. Reduction of genetic variation was observed in all invasive...

Apport de la génétique pour une meilleure connaissance des populations naturelles et une amélioration des populations cultivées d'huîtres plates et creuses

Palavras-chave: Invasion biology; Neotropical; Population genetics; Translocation; Tucunaré.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100105

Biodiversity and sustainable management of a tropical wetland lake ecosystem: A case study of Lake Kanyaboli, Kenya

Lapegue, Sylvie.

In the framework of the French diploma "Habilitation à Diriger des Recherches", Sylvie Lapègue's synthesis of research includes ten years (1998-2007) of work in bivalve genetics, and mainly cupped and flat oysters. This research has been developed in (1) flat oyster population genetics at the European level and cupped oyster populations and species genetics at a global scale, (2) the characterization of a cytogenetic particularity observed in oysters that corresponds to a high rate of aneuploidy in somatic cells, and (3) more recently in the use of molecular markers for the construction or improvement of genetic maps, allowing (4) the identification of areas of the genome related to the resistance to summer mortality in the Pacific oyster and the...

Tipo: Text

Palavras-chave: Ostrea; Crassostrea; Oysters; QTLs; Genetic maps; Breeding; Aneuploidy; Population genetics; Ostrea; Crassostrea; Huître; QTLs; Cartes génétiques; Amélioration; Aneuploïdie; Génétique des populations.

Ano: 2007

URL: http://archimer.ifremer.fr/doc/2007/these-3478.pdf

OceanDocs

Rasowo, J.O.; Abila, R.; Manyala, J..

Lake Kanyaboli and the surrounding Yala swamp wetland has been recognized as an important biodiversity hotspot. Recent population genetic and phylogenetic studies confirm the evolutionary importance of Lake Kanyaboli (Kenya) in preserving the cichlid fish fauna of Lake Victoria. The adjoining Yala swamp harbours the endangered swamp antelope Sitatunga (Tragecephalus spekii) and several papyrus endemic birds. The lake and adjoining swamp play a critical role in the livelihood of the local communities who heavily depend on the wetland resources. Current ongoing large scale land use changes within the swamp threaten the ecological integrity and functioning of this highly dynamic wetland ecosystem. It is therefore imperative that proper management and...

Tipo: Proceedings Paper

Palavras-chave: Wetlands; Biodiversity; Resource conservation; Inland waters; Ecosystem management; Ecological crisis; Tropical environment; Population genetics; Phylogenetics; Lake fisheries; Freshwater fish; Aquatic birds; Land use.

Ano: 2006

URL: http://hdl.handle.net/1834/2126

Changes in the genetic structure of Atlantic salmon populations over four decades reveal substantial impacts of stocking and potential resiliency

Perrier, Charles; Guyomard, Rene; Bagliniere, Jean-luc; Nikolic, Natacha; Evanno, Guillaume.

While the stocking of captive-bred fish has been occurring for decades and has had substantial immediate genetic and evolutionary impacts on wild populations, its long-term consequences have only been weakly investigated. Here, we conducted a spatiotemporal analysis of 1428 Atlantic salmon sampled from 1965 to 2006 in 25 populations throughout France to investigate the influence of stocking on the neutral genetic structure in wild Atlantic salmon (Salmo salar) populations. On the basis of the analysis of 11 microsatellite loci, we found that the overall genetic structure among populations dramatically decreased over the period studied. Admixture rates among populations were highly variable, ranging from a nearly undetectable contribution from donor stocks...

Tipo: Text

Palavras-chave: Conservation; Population genetics; Salmo salar; Stocking; Temporal stability.

Ano: 2013

URL: http://archimer.ifremer.fr/doc/00141/25271/23328.pdf

Characterization of the complete mitochondrial genome and a set of polymorphic microsatellite markers through next-generation sequencing for the brown brocket deer Mazama gouazoubira

Caparroz,Renato; Mantellatto,Aline M.B.; Bertioli,David J.; Figueiredo,Marina G.; Duarte,José Maurício B..

The complete mitochondrial genome of the brown brocket deer Mazama gouazoubira and a set of polymorphic microsatellite markers were identified by 454-pyrosequencing. De novo genome assembly recovered 98% of the mitochondrial genome with a mean coverage of 9-fold. The mitogenome consisted of 16,356 base pairs that included 13 protein-coding genes, two ribosomal subunit genes, 22 transfer RNAs and the control region, as found in other deer. The genetic divergence between the mitogenome described here and a previously published report was ∼0.5%, with the control region and ND5 gene showing the highest intraspecific variation. Seven polymorphic loci were characterized using 15 unrelated individuals; there was moderate genetic variation across most loci (mean...

Color polymorphism and allele frequency in a Brazilian population of the sunflower caterpillar Chlosyne lacinia saundersi (Doubleday) (Lepidoptera: Nymphalidae)

Palavras-chave: Conservation; Microsatellites; Mitogenome; Population genetics; 454-pyrosequencing.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300338

Neotropical Entomology

Lopes-da-Silva,Marcelo; Casagrande,Mirna M..

The aim of this work was at calculating allele frequency color polymorphism in a population of sunflower caterpillar, Chlosyne lacinia saundersi (Doubleday) from Londrina, Paraná State, Brazil. Allele frequency in insect populations can be used as genetic marker to compare populations from different geographical and host origins. There are three phenotypes conditioned by two loci interacting epistatically. The phenotypes are: rufa (oranged colored larvae), bicolor (black larvae with dorsal orange stripes) and nigra, larvae with the body entirely black, sometimes with dorsal yellow dots, best seen in the fourth and fifth instars. Samples were taken independently in an attempt to obtain all combinations of crossing among genotypes. The genetic mechanism of...

Conservación y genética poblacional de ballenas jorobadas de la Península Antártica y Pacífico Sudamericano

Palavras-chave: Epistasis; Population genetics; Ecological genetics; Phenotype.

Ano: 2003

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100025

OceanDocs

Olavarría, C..

El autor se refiere a la explotación y manejo de ballenas jorobadas del hemisferio sur, la identidad poblacional de ballenas jorobadas del Pacífico Sur Oriental y la ecología molecular de ballenas jorobadas. El artículo concluye con la mención al proyecto "Estructura genética poblacional de las áreas de alimentación de ballenas jorobadas de la Península Antártica y sur de Sudamérica usando marcadores nucleares y mitocondriales" que financia actualmente el INACH, con el cual se completarán los análisis previos de diversidad genética y estructura poblacional de ballenas jorobadas del Pacífico Sur oriental mediante métodos filogenéticos y cuantitativos. Se llevará a cabo un análisis de genotipeo de microsatélites de ADNn para complementar el análisis...

Tipo: Journal Contribution

Palavras-chave: Marine mammals; Population genetics; Population genetics; Http://aims.fao.org/aos/agrovoc/c_34326.

Ano: 2008

URL: http://hdl.handle.net/1834/3361

Constitution of aquacultural stocks: Genetic aspects.

Danko Brncic and the flower-flies

Chevassus, B.

Before reaching of production level justifying an elaborated genetic improvement program, the new aquaculture species deserve a minimal strategy to avoid the consequences of uncontrolled genetic phenomena. Three main aspects will be discussed: initial constitution of the broodstock; maintenance of the broodstock; selection of the broodstock.

Tipo: Text

Palavras-chave: Oncorhynchus keta; Salmo salar; Salmo trutta; Salmonidae; Pisces; Marine molluscs; Marine fish; Sex ratio; Females; Males; Eggs; Larvae; Spawning populations; Aquaculture; Population genetics.

Ano: 1989

URL: http://archimer.ifremer.fr/doc/1989/acte-1442.pdf

RChHN

CARSON,HAMPTON L..

This is a personal essay commemorating Brncic as a keen naturalist/evolutionist in the best Darwinian sense. His innate curiosity, so important in a scientist, led him to the discovery of cenain unique drosophilid flies in Chile. The life cycle of one species of flower-fly (Drosophila flavopilosa) is of special interest. Females oviposit in fresh flowers of a solanaceous plant that is widespread in Chilean valleys. Twenty years of combined ecological and genetic work, carried out on this species, pioneers the use of a highly specialized Drosophila species in the study of population genetics and evolution. Many eco-genetic features are revealed that are important supplements to observations made on the widely-studied generalist species of the genus

Tipo: Journal article

Palavras-chave: Flower-breeding Drosophila; Genetic specialization; Ecology; Population genetics; Evolution.

Ano: 2001

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000000008

Development and characterization of 20 polymorphic microsatellite markers for Epinephelus marginatus (Lowe, 1834) (Perciformes: Epinephelidae) using 454 pyrosequencing

Vaini,Jussara Oliveira; Mota,Kenneth Gabriel; Ojeda,Alejandra Paola; Barreiros,João Pedro; Moreira,Renata Guimarães; Hilsdorf,Alexandre Wagner Silva.

Abstract The dusky grouper, Epinephelus marginatus, is a well-known and widespread marine fish assessed as endangered by the International Union for the Conservation of Nature. Analyzing the genetic diversity of this species is, therefore, of utmost importance and necessary for conservation purposes. Microsatellites are molecular tools with advantages that are ideal for population analyses. This study provides the first set of species-specific microsatellite loci for E. marginatus that can be applied when assessing both intra- and interpopulation genetic variation. Twenty microsatellite loci were isolated and characterized for the dusky grouper by genotyping 20 individuals obtained from the North Eastern Atlantic Ocean (n = 4) and from the South Western...