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Allozymic variation in the clam genus Eurhomalea (Bivalvia: Veneriidae) along southern South American coast RChHN
GALLARDO,M.H; GONZÁLEZ,C; MENA,C; LOMOVASKY,B; MORRICONI,E; CLASING,E.
The correspondence between allozymic variation and specific differentiation was studied in four populations corresponding to the three nominal, allopatric species of clam genus Eurhomalea (E. rufa, E. lenticularis, E. exalbida) described for southern South America. Allozyme variation scored in 12 loci was high as indicated by heterozygosity levels (15.8-20.7 %) and by the presence of only three monomorphic loci (Hk-2, Icd-2, and Xdh-1). These high estimates of allelic variability were influenced by the low levels of interspecific genetic similarity (I = 0.64) and for the high conspecific values of genetic identity observed. The high estimates of substructuring found at the species level (F ST = 0.39) contrasted with the low differentiation (F ST = 0.027)...
Tipo: Journal article Palavras-chave: Allozymic variation; Genetic structure; Taxonomic status.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300013
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Apport des informations moléculaires et cellulaires pour la caractérisation de la résistance de l'huître plate européenne vis-à-vis de la bonamiose, et pour la détection de signatures de la sélection naturelle ArchiMer
Harrang, Estelle.
The European flat oyster, an endemic species from European coasts, has been classified in the category of "endangered and/or declining species" since 2003. Indeed, the natural beds of this oyster, consumed since ancient times, have gradually been decimated by over-exploitation and by successive emergence of parasitic diseases. The parasite that causes the disease called bonamiosis has contributed to drastically reduce the French and European aquacultural production of flat oyster. Marine bivalve molluscs display two specificities that restrict possibilities to fight against diseases: they are grown in an open environment, and possess an innate immune system lacking in adaptive response. In this context, the selection of animaIs naturally resistant to...
Tipo: Text Palavras-chave: Huître plate Européenne; Ostre edulis; Bonamiose; Bonamia ostreae; Marqueurs SNP; Expression génique; Activité hémocytaire; Cartographie de liaison; QTL; EQTL; Populations naturelles; Diversité génétique; Sélection naturelle; European flat oyster; Ostrea edulis; Bonamiosis; Bonamia ostreae; SNP markers; Gene expression; Haemocytic activity; Linkage map; QTL; EQTL; Natural populations; Genetic diversity; Genetic structure; Natural selection.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00127/23785/21702.pdf
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Association mapping for yield and grain quality traits in rice (Oryza sativa L.). Repositório Alice
BORBA, T. C. de O.; BRONDANI, R. P. V.; BRESEGHELLO, F.; COELHO, A. S. G.; MENDONÇA, J. A.; RANGEL, P. H. N.; BRONDANI, C..
Association analysis was applied to a panel of accessions of Embrapa Rice Core Collection (ERiCC) with 86 SSR and field data from two experiments. A clear subdivision between lowland and upland accessions was apparent, thereby indicating the presence of population structure. Thirty-two accessions with admixed ancestry were identified through structure analysis, these being discarded from association analysis, thus leaving 210 accessions subdivided into two panels. The association of yield and grain-quality traits with SSR was undertaken with a mixed linear model, with markers and subpopulation as fixed factors, and kinship matrix as a random factor. Eight markers from the two appraised panels showed significant association with four different traits,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Association analysis; Core collection; Genetic structure; Arroz; Oryza sativa; Recurso genético; Germoplasma; Rice; Germplasm conservation.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/862017
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Characterization of casein gene complex and genetic diversity analysis in indian goats Inra
Rout, P.K.; Kumar, A.; Mandal, A.; Laloë, D.; Singh, S.K.; Roy, R..
Milk protein polymorphism plays an important role in genetic diversity analysis, phylogenetic studies, establishing geographical diversity, conservation decision, and improving breeding goals. Milk protein polymorphism in Indian goat breeds has not been well studied; therefore, an investigation was carried out to analyze the genetic structure of the casein gene and milk protein diversity at six milk protein loci in nine Indian goat breeds/genetic groups from varied agro-climatic zones. Milk protein genotyping was carried out in 1098 individual milk samples by SDS-PAGE at aS1-CN (CSN1S1), b-CN (CSN2), aS2-CN (CSN1S2), j-CN (CSN3), b-LG, and a-LA loci. Indian goats exhibited aS1-casein A allele in higher frequency in the majority of breeds except Ganjam and...
Tipo: Journal Article Palavras-chave:  Casein haplotype; Genetic polymorphism; Genetic structure; Goat.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201140d0a011&uri=/notices/prodinra1/2011/06/
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Combining US and Brazilian Microsatellite Data for a meta-analysis of sheep (Ovis aries) breed diversity: facilitating the FAO Global Plan of Action for Conserving Animal Genetic Resources. Repositório Alice
PAIVA, S. R.; MARIANTE, A. da S.; BLACKBURN, H. D..
bitstream/item/183403/1/esr101.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Genetic structure; Merging data sets; Molecular markers.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/909125
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Comparative genetic structure in pines: evolutionary and conservation consequences 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
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Conservação genética de populações de Cryptocarya moschata Nees (Lauraceae) na Mata Atlântica do estado de São Paulo Rev. Bras. Bot.
MORAES,PEDRO LUÍS RODRIGUES DE; MONTEIRO,REINALDO; VENCOVSKY,ROLAND.
Através da análise de 18 locos isoenzimáticos polimórficos, foram estimadas as freqüências alélicas referentes a 214 indivíduos adultos de quatro populações naturais de Cryptocarya moschata de duas regiões do estado de São Paulo. Com base nas heterozigosidades observadas e esperadas, foram obtidas estimativas das estatísticas F de Wright. Para fins de comparação, utilizou-se também o método da análise da variância para estimação dos parâmetros correspondentes F = FIT, <FONT FACE="Symbol">q</font>P= FST e f = FIS. Os dois métodos forneceram resultados bastante concordantes: <img src="http:/img/fbpe/rbb/v22s2/f.gif" alt="f.gif (76 bytes)">IT = 0,142; <img src="http:/img/fbpe/rbb/v22s2/f.gif" alt="f.gif (76 bytes)">ST = 0,140; <img...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic structure; Effective population size; Gene flow; Cryptocarya moschata.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500004
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Detailed insights into pan-European population structure and inbreeding in wild and hatchery Pacific oysters (Crassostrea gigas) revealed by genome-wide SNP data ArchiMer
Vendrami, David L. J.; Houston, Ross D.; Gharbi, Karim; Telesca, Luca; Gutierrez, Alejandro P.; Gurney-smith, Helen; Hasegawa, Natsuki; Boudry, Pierre; Hoffman, Joseph I..
Cultivated bivalves are important not only because of their economic value, but also due to their impacts on natural ecosystems. The Pacific oyster (Crassostrea gigas) is the world's most heavily cultivated shellfish species and has been introduced to all continents except Antarctica for aquaculture. We therefore used a medium-density single nucleotide polymorphism (SNP) array to investigate the genetic structure of this species in Europe, where it was introduced during the 1960s and has since become a prolific invader of coastal ecosystems across the continent. We analyzed 21,499 polymorphic SNPs in 232 individuals from 23 localities spanning a latitudinal cline from Portugal to Norway and including the source populations of Japan and Canada. We confirmed...
Tipo: Text Palavras-chave: Aquaculture; Crassostrea gigas; Genetic structure; High-density genotyping array; Inbreeding; Pacific oyster; Restriction site-associated DNA (RAD) sequencing; Single nucleotide polymorphism (SNP).
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00484/59561/62557.pdf
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Discriminating populations of Paleosuchus trigonatus (Caimaninae: Alligatoridae) through microsatellite markers retrieved by next generation sequencing. Repositório Alice
MUNIZ, F. de L.; XIMENES, A. M.; BITTENCOURT, P. S.; RANGEL, S. M. H.; CAMPOS, Z. M. da S.; HRBEK, T.; FARIAS, I. P..
bitstream/item/182017/1/Discriminating-Zilca.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Cross-amplification; Genetic structure; Madeira River; Xingu River; Paleosuchus trigonatus.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091695
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Estructura genética de poblaciones de Oligonychus perseae y Oligonychus punicae (Acari: Tetranychidae) en huertos de aguacate. Colegio de Postgraduados
Guzmán Valencia, Stephanie.
La identidad y estructura genética de poblaciones de Oligonychus punicae y O. perseae (Acari: Tetranychidae) fue estudiada en siete localidades productoras de aguacate Persea americana var. Hass. La identidad de los ácaros fue determinada morfológica y molecularmente mediante la secuenciación de una fracción del gen Citocromo Oxidasa subunidad I (COI). La variación genética intraespecífica de diferentes poblaciones de ambas especies de ácaros fue estudiada mediante la secuenciación de las regiones ITS1 e ITS2 del rADN. El análisis filogenético de las secuencias parciales del gen COI separó adecuadamente las dos especies de ácaros, confirmando los resultados de la identificación morfológica. El análisis de las secuencias de las regiones ITS1 e ITS2 del...
Palavras-chave: COI; ITS1; ITS2; Estructura genética; Entomología y Acarología; Maestría; Genetic structure.
Ano: 2012 URL: http://hdl.handle.net/10521/1765
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Genetic charecterization of cotton landraces found in the Paraíba and Rio Grande do Norte states. Repositório Alice
MENEZES, I. P. P. DE; HOFFMANN, L. V.; BARROSO, P. A. V..
The objective of this study was to estimate genetic diversity of cotton mocó planted in Paraíba and Rio Grande do Norte using microsatellite markers, since mocó landraces are a valuable source of genetic diversity. A set of 38 accessions - 21 plants from Rio Grande do Norte and 17 from Paraiba - was analyzed using 24 pairs of cotton microsatellite primers, which amplified 20 polymorphic loci. The average inbreeding was 0.432, and was slightly higher in individuals from Paraíba than from Rio Grande do Norte. Genetic diversity (Nei´s unbiased estimator) between individuals from each state?s populations had similar values (HT = 0.327 and 0.302 in Paraíba and Rio Grande do Norte, respectively), indicating that comparable variability has been maintained....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cotton; Genetic structure; Microsatellite markers; Gossypium hirsutum.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1041495
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Genetic diversity in two Italian almond collections Electron. J. Biotechnol.
Rigoldi,Maria Pia; Rapposelli,Emma; De Giorgio,Donato; Resta,Paolo; Porceddu,Andrea.
Background Sweet-seeded domesticated almonds were brought to the Mediterranean Basin from central Asia about 4000 years ago. In Italy, most of the almonds produced are cultivated in the southern part of the country. Local populations of the tree in Sardinia are largely seed-derived and mostly self-incompatible, so have developed extensive genetic diversity. The need to protect biodiversity has prompted a revived interest in local genetic materials in almond. Two Italian collections have been established, one in Sardinia and the other in Apulia. These collections were the focus of the present evaluation of genetic diversity. Results Eleven SSRs (microsatellites) were used for fingerprinting. The Sardinian germplasm was highly polymorphic, revealing a mean...
Tipo: Journal article Palavras-chave: Biodiversity; Genetic structure; Prunus amygdalus; SSR.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000100008
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Genetic diversity of arboreal cotton populations of the Brazilian semiarid: a remnant primary gene pool for cotton cultivars. Repositório Alice
MENEZES, I. P. P. DE; HOFFMANN, L. V.; SILVA, A. R. DA; BARROSO, P. A. V..
Mocó cotton belong to the same species as the cultivated species, Gossypium hirsutum, and cultivated forms were mainly landraces but also developed as cultivars, bearing good fiber quality and drought tolerant when cropped as a perennial species. The northeast Brazil crop system based on this cotton type is finished, with a few small area planted in the three main States, where it was previously cultivated (Ceará, Paraíba, and Rio Grande do Norte), but in others, maintenance is accomplished by single dooryard plants. Plants were found in all visited Northeast Brazil municipalities, sometimes in the North of the country, and were collected for ex situ preservation and evaluation. Most of seeds had no fuzz (62.2%) and 94.6% of the genotypes presented spot in...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Mocó cotton; Microsatellite markers; Genetic diversity; Germplasm conservation; Genetic structure.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1074553
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Genetic diversity strategy for the management and use of rubber genetic resources: more than 1,000 wild and cultivated accessions in a 100-Genotype core collection. Repositório Alice
SOUZA, L. M. de; LE GUEN, V.; CERQUEIRA-SILVA, C. B. M.; SILVA, C. C.; MANTELLO, C. C.; CONSON, A. R. O.; VIANNA, J. P. G.; ZUCCHI, M. I.; SCALOPPI JUNIOR, E. J.; FIALHO, J. de F.; MORAES, M. L. T. de; GONÇALVES, P. de S.; SOUZA, A. P. de.
Abstract - The rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. Arg.] is the only plant species worldwide that is cultivated for the commercial production of natural rubber. This study describes the genetic diversity of the Hevea spp. complex that is available in the main ex situ collections of South America, including Amazonian populations that have never been previously described. Genetic data were analyzed to determine the genetic structure of the wild populations, quantify the allelic diversity and suggest the composition of a core collection to capture the maximum genetic diversity within a minimal sample size. A total of 1,117 accessions were genotyped with 13 microsatellite markers. We identified a total of 408 alleles, 319 of which...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Hevea brasiliensis; Natural rubber; Estrutura genética; Genetic structure.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1035994
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Genetic structure and demographic history of striped weakfish Cynoscion guatucupa (sciaenidae) from the southwestern atlantic JBAG
Alonso,M.P; Fernández Iriarte,P.J.
In South America, the Pleistocene was characterized by important environmental changes related to glacial cycles, which had significant effects on the evolutionary history of several marine species. To evaluate the pattern of demographic history and the genetic structure of striped weakfish Cynoscion guatucupa, a 401 bp fragment of the mitochondrial Cytochrome b gene was sequenced from 92 individuals from three coastal areas in Argentina and one in Brazil in the southwestern Atlantic. Haplotype diversity was high, whereas nucleotide diversity was low among all sampling sites. The star-like pattern was not phylogeographically structured, in agreement with the AMOVA analysis. The Fu&#8217;s test was negative and highly significant whereas the mismatch...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic structure; Cytochrome b; Marine fish; Pleistocene; Mutation rate.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332015000300001
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Heterogeneous genetic structure in a natural population of Raulí (Nothofagus nervosa) Ciencia e Investigación Agraria
Carrasco,Basilio; Eaton,Lafayette; Letelier,Luis; Díaz,Carole; García-Gonzáles,Rolando.
Heterozygote deficiencies in natural populations of outbreeding tree species are common and thought to be due mainly to biparental inbreeding. Inbreeding is believed to be caused by family structure within populations, a product of limited seed dispersal and probably limited pollen dispersal. Although both theory and simulation studies predict that structure should be apparent where trees are isolated by distance, most studies of structure in natural populations have detected only a weak spatial genetic structuring. In this contribution, we compare the use of spatial autocorrelation methodology and F statistics with the concept of relatedness to examine the spatial genetic structure in the natural population of a native southern beech and to explore the...
Tipo: Journal article Palavras-chave: Genetic structure; Spatial structure; Raulí; Spatial autocorrelation.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000300014
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High genetic diversity and small genetic variation among populations of Magnolia wufengensis (Magnoliaceae), revealed by ISSR and SRAP marker Electron. J. Biotechnol.
Chen,Liyuan; Chen,Faju; He,Suichao; Ma,Luyi.
Background Genetic diversity and genetic variation of 10 populations and subpopulations of Magnolia wufengensis, a new and endangered endemic species, were examined by inter simple sequence repeat (ISSR) and sequence-related amplified polymorphism (SRAP) molecular markers. Compared with other endangered endemic Magnolia taxa, M. wufengensis holds a relatively high level of genetic variation. Result Total genetic diversity was found to be 87.7% for ISSR and 88.0% for SRAP markers. For polymorphic loci (P), the effective mean number of alleles (Ae) was 1.414 for ISSR markers and 1.458 for SRAP markers, while the mean expected heterozygosity (H) was 0.256 using ISSR and 0.291 for SRAP markers. Within-population variation was estimated for P as 74.9% using...
Tipo: Journal article Palavras-chave: Genetic structure; ISSR; Population genetic diversity; SRAP.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000600003
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High levels of genetic differentiation and selfing in the Brazilian cerrado fruit tree Dipteryx alata Vog. (Fabaceae). Repositório Alice
TARAZI, R.; MORENO, M. A.; GANDARA, F. B.; FERRAZ, E. M.; MORAES, M. L. T.; VINSON, C. C.; CIAMPI, A. Y.; VENCOVSKY, R.; KAGEYAMA, P. Y..
bitstream/item/181847/1/49594abb3f3908824070572dfba947bb033d.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Genetic structure; Mating system; SSR; Dipteryx Alata.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/871602
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Historia de vida y genética cuantitativa de cuatro poblaciones del cocodrilo de pantano (Crocodylus moreletii) bajo condiciones de cautiverio en el trópico mexicano. Colegio de Postgraduados
Serna Lagunes, Ricardo.
Se evaluó la variación morfológica, crecimiento corporal, estructura, variación genética y tamaño efectivo de población (Ne) de cuatro poblaciones de Crocodylus moreletii, manejadas en la UMA Cacahuatal, situada en Veracruz, México. La variación morfológica y el crecimiento corporal se evaluaron aplicando un análisis multivariado de covarianza (MANCOVA) y un análisis de varianza (ANOVA), respectivamente. La descripción de la estructura genética se realizó acorde a los principios de Hardy-Weinberg y se evaluó la variación genética con un análisis de varianza molecular (AMOVA), que se corroboró con los estadísticos F. El Ne se determinó a partir del total de cocodrilos reproductivos y se obtuvo la tasa de incremento de endogamia. La población de Villa Juárez...
Palavras-chave: Morfología; Crecimiento corporal; Estructura genética poblacional; Variación genética; Tamaño efectivo de población; Morphology; Body growth; Genetic structure; Genetic variation; Effective population size; Maestría; Agroecosistemas Tropicales.
Ano: 2010 URL: http://hdl.handle.net/10521/191
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Impacts of stocking on the genetic diversity of Colossoma macropomum in central Amazon, Brazil. Repositório Alice
QUEIROZ, C. A. de; SOUSA, N. R.; SILVA, G. F. da; INOUE, L. A. K. A..
Tambaqui (Colossoma macropomum) is the main fish species farmed on a commercial scale in northern Brazil. In view of the current scenario of Brazilian aquaculture, studies on the genetic improvement and reproductive management of captive tambaqui are crucial in identifying the genetic variability of broodstocks and devising management practices. Genetic diversity of three tambaqui broodstocks in western Amazon was evaluated using molecular markers.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Colossoma macropomum; Tambaqui; Genetic variability; Amazonian fish; Genetic structure; Broodstock; Genetic management.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1046067
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