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

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

Análise da estrutura populacional de ovinos deslanados do núcleo de conservação.

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

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

TINO, C. R. S.; CAVANI, L.; FONSECA, R.; SILVA, K. de M..

Resumo: Este estudo analisou a estrutura populacional de ovinos deslanados do núcleo de conservação do estado do Ceará, Brasil. Os parâmetros populacionais foram estimados com base nos dados genealógicos de indivíduos das raças Santa Inês (SI), Somalis (SO) e Morada Nova (MN), nascidos entre os anos de 2001 e 2014. Os parâmetros estimados foram: número de gerações completas equivalentes (GCE), intervalo entre gerações (IEG), número de fundadores (Nf), número efetivo de fundadores (fe), número efetivo de ancestrais (fa), coeficiente de endogamia (F) e índice de contribuição genética (ICG). O GCE médio foi de 1,82, 2,78 e 1,52 para SI, SO e MN, respectivamente. O IEG foi próximo entre as raças, 3,67 anos em média. O Nf para SI, SO e MN foi igual a 225, 194 e...

Tipo: Artigo de periódico

Palavras-chave: Fundadores; Diversidade genética; Raça Santa Inês; Raça nativa; Raça Somalis; Raça Morada Nova; Região Nordeste; Brasil; Founders; Brazilian Northeast; Ovino; Melhoramento Genético Animal; Genética Animal; Conservação; Endogamia; Sheep; Population genetics; Conservation programs; Animal genetic resources; Breeding and Genetic Improvement; Inbreeding.

Ano: 2020

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120340

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

Avaliacao genetica e selecao em Eucalyptus grandis na regiao de Arapoti - PR.

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

DUDA, L. L.; RESENDE, M. D. V. de; CANDIDO, H. C. S..

Foram avaliados 17.916 indivíduos, pertencentes a 163 progênies de polinização aberta de 11 populações de Eucalyptus grandis, implantadas em duas fazendas na região de Arapoti - PR, visando a seleção de indivíduos com base em seus valores genéticos preditos. Foram obtidas estimativas médias da herdabilidade no sentido restrito, em nível de indivíduos e da acurácia seletiva, da ordem de 40 e 65%, respectivamente. A estimativa (0,75) da correlação genética entre médias de progênies, nas duas fazendas, indicou que a interação genótipo X ambiente não é problemática para o melhorista. Ganhos genéticos da ordem de 87 a 105% poderão ser obtidos com o estabelecimento das populações de melhoramento e de produção de sementes, respectivamente.

Tipo: Artigo de periódico

Palavras-chave: Populacao genetica; Ganho genetico; Genetic gain.; Seleção Genética.; Population genetics; Selection methods..

Ano: 1997

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/285141

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

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

Caracterização de um rebanho da raça ovina Somalis Brasileira com base em análise de Pedigree.

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

AGUIAR, A. L. de; COSTA, A. C.; GALVÃO, M. A. A.; SANTOS, T. N. M. dos; SILVA, K. de M.; SHIOTSUKI, L.; LOBO, R. N. B..

Resumo: Este estudo teve como objetivo avaliar a estrutura populacional do Núcleo de Conservação de Ovinos da Raça Somalis Brasileira, da Embrapa Caprinos e Ovinos, Sobral - CE. Foram utilizadas informações de pedigree de 1.353 animais, nascidos entre os anos 2000 e 2014. A endogamia média e o coeficiente médio de parentesco foram 2,68% e 9,60% respectivamente. O número máximo de gerações conhecidas foi de oito, com aumento significativo das informações de pedigree ao longo das gerações. Do total de animais estudados, 86,55%, 61,25% e 45,49% possuíam informações de pedigree na primeira, segunda e terceira ascendência. O intervalo médio de gerações foi de 4,33 anos. O tamanho efetivo da população foi de 27,48 animais, abaixo do valor recomendado para a...

Tipo: Anais e Proceedings de eventos

Palavras-chave: Raça Somalis Brasileira; Genetic diversity as resource; Diversidade genética; Estrutura populacional; Variabilidade genética; Genética de populações; Raça localmente adaptada.; Ovino; Conservação; Endogamia; Sheep; Animal genetics; Population genetics; Pedigree..

Ano: 2015

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1035378

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...

Clonal selection of Eucalyptus grandis x Eucalyptus globulus for productivity, adaptability, and stability, using SNP markers.

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

Ano: 2015

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

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

TORRES-DINI, D.; NUNES, A. C. P.; AGUIAR, A. V. de; NIKICHUK, N.; CENTURIÓN, C.; CABRERA, M.; MORAES, M. L. T.; RESENDE, M. D. V. de; SEBBENN, A. M..

In Uruguay, reforestations with Eucalyptus sp. is of fundamental importance to supply paper, pulp, and wood production. This study investigates genetic, productivity, stability, and adaptability parameters in the selection of Eucalypts grandis x Eucalyptus globulus full-sib hybrid clones. The study was conducted in a clonal test, repeated in two different soils types, in Rio Negro State, Uruguay. The population was characterized phenotypically for diameter at breast height (dbh) and genotyped for SNP markers (EuCHIP60K chip). Mean dbh was similar between sites and the genotype?environment interaction was simple. We found high genotype correlation in clone performance between environments (0.708), indicating the possibility of selecting the same clones for...

Tipo: Artigo de periódico

Palavras-chave: Genética de populações; Genética quantitativa; Forest breeding; Gene markers; Eucalipto; Híbrido; Melhoramento genético vegetal; Eucalyptus; Hybrids; Plant breeding; Population genetics; Quantitative genetics.

Ano: 2016

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1080981

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...