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Registros recuperados: 21
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A first genetic linkage map of the blue mussel Mytilus edulis ArchiMer
Lallias, Delphine; Hecquet, Céline; Boudry, Pierre; Lapegue, Sylvie; Beaumont, Andy.
The blue mussel, Mytilus edulis, is widely distributed in the northern hemisphere, from the White Sea to the Atlantic coast of southern France, and is an economically important species (1 million tons per year, FAO, 2002). At present however, little domestication has been achieved with bivalves, in contrast to agricultural crops, livestock and horticultural species like tomatoes, where selection and production is entirely controlled by man. For bivalves, despite their economic importance, no lines with selected characteristics have been taken to the production scale. There is therefore a need to make up for lost time. Our interest in genetic mapping sprang from some results showing a genetic component to some economically important traits like growth and...
Tipo: Text Palavras-chave: QTLs; AFLP; Genetic; Mussel; Mytilus edulis; Genetic linkage map.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/acte-3465.pdf
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A first genetic linkage map of the European flat oyster, Ostrea edulis : towards the identification of Bonamia resistance QTLs ArchiMer
Lallias, Delphine; Lapegue, Sylvie; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Beaumont, Andy.
The flat oyster Ostrea edulis is an endemic European oyster species, found on both Atlantic and Mediterranean coasts. Its aquacultural production has dramatically decreased due to two successive diseases caused by the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has undertaken a breeding program to produce oyster families which are tolerant to Bonamia. In this context, the next step is to identify QTLs for resistance to this parasite. A genetic map is therefore being established as a basis for QTL work. The reference family is an F2 family produced by single pair mating of two oysters from the same F1 family. The F1 family was itself produced from a bi-parental cross between a wild oyster and an individual from the...
Tipo: Text Palavras-chave: Genetic linkage map; Parasite; Genetic; QTLs; Resistance; Bonamia ostreae; Ostrea edulis; Flat oyster.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/acte-3464.pdf
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A preliminary genetic linkage map for the European flat oyster Ostrea eduli ArchiMer
Lallias, Delphine; Lapegue, Sylvie; Halley, Chris; Boudry, Pierre; Beaumont, Andy.
The European flat oyster, Ostrea edulis, occurs naturally from Norway to Morocco in the North-Eastern Atlantic and throughout the Mediterranean. The oyster has been a harvested species for at least 6000 years. However, it successively suffered from over harvesting and then from two protozoan diseases during the 1960s and its production has drastically decreased in Europe from that time. Following two generations of selection for tolerance to one of these diseases (bonamiosis), our aim is to optimize this selection with the assistance of molecular markers, that is to say to implement marker-assisted selection. This will enhance the efficiency of selection by reducing the generation time, as the selection on sites cannot be made before the oysters are...
Tipo: Text Palavras-chave: QTLs; Ostrea edulis; Genetic linkage map; Genetic; European flat oyster.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3473.pdf
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A preliminary genetic linkage map for the European flat oyster Ostrea edulis L. ArchiMer
Lallias, Delphine; Lapegue, Sylvie; Harley, Crhis; Boudry, Pierre; Heurtebise, Serge; Beaumont, Andy.
The flat oyster Ostrea edulis is the species endemic to European coasts, both Atlantic and Mediterranean. It has been exploited since Roman times, but its aquaculture production decreased from around 20000 tons in the 1950's to 1500 tons today because of two successive diseases due to the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has been undertaking a breeding program to produce families of oysters tolerant to Bonamia. In this context, a further step would be to identify QTLs for resistance to this parasite. Therefore, as a first step a genetic map is now being built. The establishment of a genetic linkage map will provide a foundation for the mapping of QTLs, with the ultimate objective to implement...
Tipo: Text Palavras-chave: QTLs; Ostrea edulis; Flat oyster; Genetic linkage map; Genetic.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3466.pdf
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Apport de la génétique pour une meilleure connaissance des populations naturelles et une amélioration des populations cultivées d'huîtres plates et creuses ArchiMer
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
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Desenvolvimento e mapeamento de marcadores microssatélites e identificação de QTLs ligados à produtividade e à resistência à mancha preta em Arachis spp. Repositório Alice
MORETZSOHN, M. de C..
O amendoim cultivado (Arachis hypogaea) é uma cultura importante, amplamente cultivada nas regiões tropicais e subtropicais do mundo. É bastante susceptível a diversos estresses bióticos e abióticos, para os quais muitas das espécies silvestres são resistentes. Como um primeiro passo visando a introgressão desses genes de resistência no amendoim cultivado, um mapa de ligação foi construído, usando uma população F2' obtida do cruzamento entre duas espécies silvestres diplóides de genoma AA (A. duranensis e A. stenosperma). Esse mapa foi baseado em marcadores microssatélites e marcadores âncoras, ambos codominantes e transferíveis entre espécies aparentadas. Um total de 271 novos marcadores microssatélites foi desenvolvido no presente trabalho, a partir de...
Tipo: Tese/dissertação (ALICE) Palavras-chave: Amendoim; Marcadoes microssatélites; Bibliotecas genômicas; Bibliotecas ESTs; GeneBank; Mapa genético; Espécies diplóides; RGAs; QTLs; Produtividade; Resistência genética; Fungo; Mancha preta; Cercosporidium personatum; Arachis.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/187907
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Genome-wide association study for femur-related traits in broilers. Repositório Alice
ONO, R. K.; IBELLI, A. M. G.; CANTAO, M. E.; PEIXOTO, J. de O.; SOLLERO, B. P.; SUREK, D.; MOREIRA, G. C. M.; GODOY, T. F.; COUTINHO, L. L.; LEDUR, M. C..
Abstract: Due to the intense selection for heavier and faster growing broilers, metabolic disorders such as skeletal problems became a worldwide concern. Advances in genome-wide association study (GWAS) methodologies increased the possibility of elucidating the genetic architecture controlling bone integrity traits. Therefore, the aim of this study was to perform a GWAS to identify potential genetic markers and candidate genes associated with femur traits in a paternal broiler line developed by Embrapa. To this, three femur bone-related traits were evaluated in 1,433 chickens: dry matter (FDM), ash content (FAC) and breaking strength (FBS). Chickens were genotyped using the 600K Affymetrix® Axiom® HD panel. A total of 16 regions associated to FAC, being a...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Integridade óssea; Características do fêmur; Associação genômica; QTLs; Melhoramento Genético Animal; Frango de Corte; Formação Óssea; Fêmur; Animal genetic resources; Broiler chickens; Bone metabolism; Quantitative trait loci.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093205
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Identificação de QTLs em feijoeiro por meio de marcadores SSR influenciados pela seleção natural Ciência e Agrotecnologia
Rodrigues,Taislene Butarello; Santos,João Bosco dos; Ramalho,Magno Antonio Patto; Amorim,Edson Perito; Silva,Nara Oliveira.
Para identificar QTLs para produtividade de grãos e peso de 100 sementes em feijoeiro (Phaseolus vulgaris L.), foram usados microssatélites influenciados pela seleção natural, identificados na população derivada do cruzamento 'Carioca MG' x 'ESAL 686', conduzida pelo método da população até a geração F24. Foram avaliadas 107 linhagens da geração F8 e 107 da F24 em três épocas distintas: inverno de 2001 (F8:9 e F24:25) em Ijaci; águas de 2001 (F8:10 e F24:26) e secas de 2002 (F8:11 e F24:27) ambos em Lavras. Utilizou-se o delineamento látice simples 18 x 18 em Ijaci, e triplo nas duas outras épocas. Entre os 105 pares de primers utilizados, 30 foram polimórficos nos genitores e no bulk de DNA das linhagens F24 e utilizados, juntamente com as avaliações...
Tipo: Info:eu-repo/semantics/article Palavras-chave: QTLs; Marcadores microssatélites; Phaseolus vulgaris.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000500012
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IDENTIFICACIÓN DE QTLs ASOCIADOS A CARACTERES DE ARQUITECTURA VEGETAL EN YUCA (Manihot esculenta) Acta biol.Colomb.
MORA MORENO,Ruben Eduardo; SOTO,Johana Carolina; LÓPEZ,Camilo.
La yuca (Manihot esculenta) es el cuarto cultivo en importancia a nivel mundial como fuente de calorías para la población humana después del arroz, el azúcar y el maíz, posicionándose por esta razón como un cultivo primordial para la seguridad alimentaria. Su arquitectura ha sido considerada como un factor clave que subyace a la fisiología del rendimiento, relacionando características morfológicas con productividad. En este trabajo se evaluaron diferentes características de arquitectura vegetal en yuca. Los caracteres fueron evaluados en una población F1 compuesta por 133 hermanos completos (familia K) sembrados en dos lugares biogeográficamente diferentes: La Vega (Cundinamarca) y Arauca (Arauca) en Colombia. Las características evaluadas relacionadas con...
Tipo: Journal article Palavras-chave: Arquitectura vegetal; Grupo de ligamiento; Mapeo genético; Marcador molecular; QTLs; Yuca.
Ano: 2016 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000100010
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Identificación de QTLs para carotenos en el genoma de yuca, (Manihot esculenta Crantz), y validación en poblaciones S1 Acta Agron. (Palmira)
Morillo C,Ana Cruz; Morillo C,Yacenia; Ceballos L,Hernán.
El contenido de b-caroteno en yuca (Manihot esculenta Crantz) es importante para suplir las deficiencias de vitamina A en regiones donde esta raíz es la principal fuente de alimento. Las familias de esta especie utilizadas para el análisis molecular del contenido de carotenos fueron: GM 708, GM 734 y CM 9816. Se utilizó el Análisis de Grupos Segregantes (Bulked Segregant Analysis, BSA por su sigla en inglés) para la evaluación de 800 marcadores microsatélites. Para determinar la asociación con el color del parénquima de la raíz se hizo un análisis de correlación y regresión simple entre los datos fenotípicos y los genotípicos de cada marcador. Se hizo, además, un análisis de QTLs con estas familias y se validó su presencia en descendencias S1. Se encontró...
Tipo: Journal article Palavras-chave: Carotenos; Manihot esculenta Crantz; Mapeo genético; QTLs; SSR.
Ano: 2013 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122013000300002
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Identification of non-host resistance genesin wheat to Puccinia striiformis f. sp. hordei IPB - Escola Superior Agrária
Rodrigues, Paula.
Yellow rust, caused by Puccinia striiformis West., is an important foliar disease of wheat and barley throughout the world, and the development of resistant cultivars is the most economical and environmentally friendly method of control. Breeding for resistance to yellow rust has, for decades, been based on the use of race-specific resistance genes, which have shown to be short-lived. Non-host resistance has been studied as a possible source of durable resistance. Two major genes, as well as an undetermined number of minor genes, for non-host resistance to the barley attacking form of yellow rust, P. striiformis f. sp. hordei, have been previously detected in the wheat cultivar ‘Lemhi’. The present study aimed at quantifying and mapping those genes using...
Tipo: MasterThesis Palavras-chave: Non-host resistance; QTLs.
Ano: 2004 URL: http://hdl.handle.net/10198/934
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Linkage disequilibrium, genetic association mapping and gene localization in crop plants Genet. Mol. Biol.
Sorkheh,Karim; Malysheva-Otto,Lyudmyla V.; Wirthensohn,Michelle G.; Tarkesh-Esfahani,Saeed; Martínez-Gómez,Pedro.
DNA-based molecular markers have been extensively utilized for a variety of studies in both plant and animal systems. One of the major uses of these markers is the construction of genome-wide molecular maps and the genetic analysis of simple and complex traits. However, these studies are generally based on linkage analysis in mapping populations, thus placing serious limitations in using molecular markers for genetic analysis in a variety of plant populations. Therefore, alternative approach has been suggested, linkage disequilibrium-based association analysis which detects and locates quantitative trait loci (QTL) by the strength of the correlation between a trait and a marker. Although association analysis has already been used for studies on genetics of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Linkage disequilibrium; LD; Association mapping; Population structure; QTLs; Localization of genes; Marker-trait associations.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500001
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Mapeamento de QTLs (quantitative trait loci) em galinhas. Infoteca-e
SULZBACH, A.; PEIXOTO, J. O.; ESTEVES, P. A..
2008
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Genômica; Galinhas; QTLs.
Ano: 2008 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/444152
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Mapping and stability of QTLs for seed weight in common beans under different environments. Repositório Alice
MELO, L. C.; SANTOS, J. B. dos; FERREIRA, D. F..
The objectives were: 1 - to identify, under different environments, RAPD markers linked to loci that control the 100 seed weight of common beans; 2 - to evaluate the existence of interactions involving QTL's with planting dates and locations; 3 - to compare detection procedures of markers linked to QTL's utilizing the methods of mapping and multiple regression. One hundred and minety-six recombinant inbred lines derived from the cross of cultivars Carioca x Flor de Mayo were evaluated under two tradtional sowing dates for common beans in 1996, 1997 and 1998, in Lavras and Patos de Minas, Brazil. For the phenotypic evaluation of the families, seven field experiments were conduced. The experimental design used was a 14 x 14 partially balanced Square Simple...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Phaseolus vulgaris; Seed weight; QTLs; Environments interactions; RAPD; Feijão; Mapeamento; Estabilidade; Semente; Marcador.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/212573
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Overwiew on molecular tools in bivalve shellfish aquaculture ArchiMer
Boudry, Pierre; Saavedra, Carlos.
Dr. Boudry presented an overview of the current development of molecular tools in shellfish bivalves, focussing on the recent development in oysters, species to which the most efforts are dedicated. This review was prepared together with Dr. Saavedra (Mollusc Research Group, Torre de la Sal, Spain) within the Fish and Shellfish group of the EU Network of Excellence "Marine Genomics Europe". Searches in DNA sequence databank ("GenBank") show that 4% are microsatellite sequences, 23% are mitochondrial sequences and the remaining 73 % other nuclear sequences. Among these, 75% concern oyster (Crassostrea) species, 15% mussel (Mytilus) species and 10% scallop (Argopecten) species. Some of these sequences were targeted as candidate genes related to known...
Tipo: Text Palavras-chave: QTLs; Mitochondrial geneome; Crassostrea virginica; Crassostrea gigas; Crassostrea; Shellfish bivalves; Molecular tools; Genetic.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-3480.pdf
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QTL mapping for resistance to bonamiosis in the European flat oyster Ostrea edulis ArchiMer
Lallias, Delphine; Beaumont, Andy; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Lapegue, Sylvie.
A breeding programme has been undertaken by Ifremer to produce selected Ostrea edulis families which are resistant to Bonamia ostreae, a parasite which is the most significant constraint on aquaculture of this oyster. Using such families, we aimed to identify Quantitative Trait Loci (QTLs) of resistance/susceptibility to bonamiosis. We used an F2 family derived from a bi-parental cross between a wild oyster and an individual from one of the selected oyster families. A total of 550 F2 individuals from the family cohabited with wild oysters that were injected with the parasite. Mortality was checked daily over six months and heart smears were used on moribund or dying oysters to detect the presence and level of infection of the parasite. Ninety two F2...
Tipo: Text Palavras-chave: QTLs; Flat oyster; Ostrea edulis; Bonamia ostreae; Genetic; QTL.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-3726.pdf
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QTLs asociados al contenido de carotenos en hojas de maíz (Zea mays L.) Agrociencia
Silva-Pérez,Viridiana; Gómez-Merino,F. Carlos; García-Zavala,J. Jesús; Burgueño-Ferreira,Juan; Santacruz-Varela,Amalio; Palacios-Rojas,Natalia; Tiessen,Axel.
Los carotenos son pigmentos antioxidantes que captan fotones del espectro de luz visible y protegen a los tejidos de las plantas contra la foto-oxidación, lo cual está relacionado con la tasa fotosintética y rendimiento de los cultivos. La biosín-tesis de los carotenos ocurre dentro de los plástidos, donde se sintetizan a partir de la vía mevalónica independiente, con la participación de más de 10 enzimas y un número de factores aún no definidos. Con el objetivo de identificar regiones cromosómicas de maíz (Zea mays L.) asociadas al contenido de carotenos, se midió el contenido de estos compuestos en hojas de 200 líneas endogámicas recombinantes de maíz, provenientes de la cruza B73×Mo17, sembradas en Irapuato, México, en el ciclo primavera-verano 2009....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; QTLs; Caracteres cuantitativos; Carotenoides en hojas.
Ano: 2012 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000400002
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QTLs y heterosis en jitomate en una población F2 derivada de una cruza interespecífica. Colegio de Postgraduados
Hernández Bautista, Aurelio.
Para estudiar y aprovechar la diversidad genética de los parientes silvestres del jitomate (Solanum lycopersicum L.), es necesario seguir explorando nuevas fuentes de genes que puedan contribuir significativamente a la formación de variedades rendidoras y de alta calidad de fruto. De acuerdo con los resultados, se observó que los progenitores difieren significativamente (p < 0.05) en la mayoría de los caracteres, excepto en pH. Las variables peso, largo y ancho de fruto, días a floración y madurez de frutos presentaron un grado de dominancia parcial a 11904, mientras que grados Brix expresó aditividad. La mayoría de los valores de heterosis fueron negativos, excepto para el número total de frutos (183.9 %), frutos por racimo (5.1 %) y días a madurez...
Palavras-chave: Solanum lycopersicum; Heterosis; Heredabilidad en sentido amplio; Grado de dominancia; S. pimpinellifolium; QTLs; Broad sense heritability; Dominance degree; Genética; Maestría.
Ano: 2013 URL: http://hdl.handle.net/10521/2026
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Quantitative trait locus mapping associated with earliness and fruit weight in tomato Scientia Agricola
Hernández-Bautista,Aurelio; Lobato-Ortiz,Ricardo; García-Zavala,José Jesús; López-Fortoso,Fernando; Cruz-Izquierdo,Serafín; Chávez-Servia,José Luis; Cadeza-Espinosa,Marisol.
ABSTRACT The flowering time is regarded as an important factor that affects yield in various crops. In order to understand how the molecular basis controlling main components of earliness in tomato (Solanum lycopersicum L.), and to deduce whether the correlation between fruit weight, days to flowering and seed weight, is caused by pleiotropic effects or genetic linkage, a QTLs analysis was carried out using an F2 interspecific population derived from the cross of S. lycopersicum and S. pimpinellifolium. The analysis revealed that most of the components related to earliness were independent due to the absence of phenotypic correlation and lack of co-localization of their QTLs. QTLs affecting the flowering time showed considerable variation over time in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; QTLs; Epistasis; Days to flowering; Path analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500478
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Searching RFLP markers to identify genes for aluminum tolerance in maize. Repositório Alice
TORRES, G.A.; MARTINS, P.R.; LOPES, M.A.; PARENTONI, S. N.; PAIVA, E..
1996
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: RFLP; Maize; Aluminum; Tolerance; Milho; Corn; Aluminio; Tolerancia; QTLs; Solo; Soil.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/472486
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