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Development of a Brazilian maize core collection Genet. Mol. Biol.
Coimbra,Ronaldo R.; Miranda,Glauco V.; Cruz,Cosme D.; Silva,Derly J.H.; Vilela,Ramiro A..
The aim of this study was to evaluate methods for developing a Brazilian maize core collection. For an initial survey of the active collection, passport information, as well as characterization and evaluation of accessions, were taken into consideration, these then being divided according to geographic region and kernel-type. Multiple sampling methods were evaluated. The strategy of constant sampling generated extensive alterations in extract accession frequency. The multivariate strategy with dispersion graphs and principal components associated with the Tocher method was considered efficient for identifying the most divergent genotypes. The multivariate strategy generated greater alterations in the variance of traits. The average number of traits...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Germplasm collection; Zea mays; Breeding; Landraces; Selection.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300017
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Distribution and agroclimatic characterization of potential cultivation regions of physic nut in Mexico. Repositório Alice
NÚÑEZ-COLÍN, C. A.; GOYTIA-JIMÉNEZ, M. A..
Os objetivos deste estudo foram determinar a distribuição e os padrões climáticos de regiões de cultivo, atuais e futuras, do pinhão-manso no México, e identificar possíveis locais para o estabelecimento de bancos ativos de germoplasma, com uso de sistemas de informação geográfica. Os dados climáticos atuais foram processados pelo software Floramap, para obter mapas de distribuição e padrões climáticos de regiões onde plantas de pinhão-manso selvagens poderiam ser encontradas. Foi utilizado o software DIVA-GIS para análise dos dados climáticos atuais (modelo Worldclim) e dos dados climáticos gerados pelo modelo CCM3, para identificar regiões de cultivo atuais e futuras de pinhão-manso, respectivamente. O pinhão-manso está distribuído na maioria das zonas...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Modelagem climática; Sistema de informação geográfica; Coleção de germoplasma; Jatropha curcas; Biocombustível; Biofuels; Geographical information systems; Germplasm collection.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/631456
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Distribution and agroclimatic characterization of potential cultivation regions of physic nut in Mexico PAB
Núñez-Colín,Carlos Alberto; Goytia-Jiménez,María Antonieta.
The purposes of this study were to determine the distribution and climatic patterns of current and future physic nut (Jatropha curcas) cultivation regions in Mexico, and to identify possible locations for in vivo germplasm banks establishment, using geographic information systems. Current climatic data were processed by Floramap software to obtain distribution maps and climatic patterns of regions where wild physic nuts could be found. DIVA-GIS software analyzed current climatic data (Worldclim model) and climatic data generated by CCM3 model to identify current and future physic nut cultivation regions, respectively. The distribution map showed that physic nut was present in most of the tropical and subtropical areas of Mexico, which corresponded to three...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Jatropha curcas; Biofuels; Climate modeling; Geographical information systems; Germplasm collection.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900002
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DNA fingerprinting of water yam (Dioscorea alata) cultivars in Brazil based on microsatellite markers Horticultura Brasileira
Siqueira,Marcos VBM; Dequigiovanni,Gabriel; Corazon-Guivin,Mike A; Feltran,José C; Veasey,Elizabeth A.
This study aimed to fingerprint 36 water yam (Dioscorea alata) accessions using microsatellite markers. Ten accessions were collected in local markets from several municipalities in Brazil, eight were obtained from the 'Instituto Agronômico de Campinas' (IAC) germplasm collection and eighteen were collected directly from growers from São Paulo state. A total of nine microsatellite loci were used in the analysis. Loci revealed high polymorphism verified by elevated PIC values (0.57-0.77), and by high gene diversity and Shannon-Wiener indices (0.69 and 1.29 on average, respectively). The accessions were classified into two groups based on clustering analysis. One group contained mostly accessions from the IAC collection, including a commercial cultivar...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dioscorea alata; Commercial varieties; Genetic diversity; Germplasm collection; SSR.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000400015
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Estratégias de amostragem e estabelecimento de coleções nucleares Repositório Alice
VASCONCELOS, E.S. de; CRUZ, C.D.; BHERING, L.L.; FERREIRA, A..
O objetivo deste trabalho foi avaliar a influência da intensidade de amostragem, do tamanho da coleção de germoplasma inicial e da variância da amostragem sobre a qualidade das respectivas coleções nucleares, quanto à representatividade das coleções iniciais. Foram simulados sete tamanhos de coleções iniciais e utilizadas seis intensidades de amostragem para estabelecimento de coleções nucleares, utilizando caracteres morfoagronômicos. Determinaram-se o número de grupos formados, o coeficiente de coincidência entre a coleção nuclear e a coleção inicial e o coeficiente de determinação dos acessos amostrados para comporem a coleção nuclear. Também foi proposto o uso de uma estratégia alternativa para estabelecer coleções nucleares, de forma a maximizar a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Coleção de germoplasma; Coleção nuclear; Intensidade de amostragem; Coeficiente de coincidência; Método de Tocher; Germplasm collection; Core collection; Sampling intensity; Coincidence rate; Tocher method.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/126118
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INTERNATIONAL EXCHANGE OF GENETIC RESOURCES, THE ROLE OF INFORMATION AND IMPLICATIONS FOR OWNERSHIP: THE CASE OF THE U.S. NATIONAL PLANT GERMPLASM SYSTEM AgEcon
Day-Rubenstein, Kelly A.; Smale, Melinda.
Changing perceptions of resource ownership have altered international exchange of genetic resources. After summarizing the role of genebanks and issues related to property regimes, this paper presents an empirical study of one of the largest national genebanks, the U.S. National Germplasm System. The demand for its genetic resources appears to be substantial, both domestically and internationally. Utilization rates are higher than suggested by past studies. The role of information in enhancing the usefulness of NPGS resources is explored with an econometric model that indicates that accompanying data make germplasm more useful. U.S. requestors account for most of the germplasm demanded, but developing countries appear to make greater use of these...
Tipo: Working or Discussion Paper Palavras-chave: Crop genetic resources; Genebanks; Germplasm collection; Genetic resource management; Developing countries; International Relations/Trade.
Ano: 2004 URL: http://purl.umn.edu/60332
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Molecular characterization of grapevine from Santa Catarina, Brazil, using microsatellite markers. Repositório Alice
SCHUCK, M.R.; MOREIRA, F.M.; GUERRA, M.P.; VOLTOLINI, J.A.; GRANDO, M.S.; SILVA, A.L.. da..
The objective of this work was to characterize the grape germplasm in Santa Catarina, Brazil, using microsatellite DNA markers (simple sequence repeats ? SSR). The DNA samples were collected from leaves and shoots of accessions of public and private collections from the counties Urussanga, Nova Trento, Rodeio, São Joaquim, Campos Novos, Videira, and Água Doce. Ten SSR loci (VVS2, VVMD5, VVMD7, VVMD27, VrZAG62, VrZAG79, VVMD25, VVMD28, VVMD31, and VVMD32) were analysed by capillary electrophoresis. Molecular profiling was conducted for 190 grapevines (European, American, and hybrids), and 67 genotypes were obtained. The data were compared with each other and with those from the literature and from online databases, in order to identify varieties and...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Vitis spp.; Cultivar identification; Genetic variability; Germplasm collection; Molecular markers; Identificação de cultivar; Variabilidade genética; Coleção de germoplasma; Marcadores moleculares.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125871
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Molecular characterization of grapevine from Santa Catarina, Brazil, using microsatellite markers PAB
Schuck,Mariane Ruzza; Moreira,Flavia Maia; Guerra,Miguel Pedro; Voltolini,José Afonso; Grando,Maria Stella; Silva,Aparecido Lima da.
The objective of this work was to characterize the grape germplasm in Santa Catarina, Brazil, using microsatellite DNA markers (simple sequence repeats - SSR). The DNA samples were collected from leaves and shoots of accessions of public and private collections from the counties Urussanga, Nova Trento, Rodeio, São Joaquim, Campos Novos, Videira, and Água Doce. Ten SSR loci (VVS2, VVMD5, VVMD7, VVMD27, VrZAG62, VrZAG79, VVMD25, VVMD28, VVMD31, and VVMD32) were analysed by capillary electrophoresis. Molecular profiling was conducted for 190 grapevines (European, American, and hybrids), and 67 genotypes were obtained. The data were compared with each other and with those from the literature and from online databases, in order to identify varieties and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis spp.; Cultivar identification; Genetic variability; Germplasm collection; Molecular markers.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000500008
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Rice germplasm: collecting, preservation use: proceedings of the third international workshop. International Rice Research Institute
IRRI-IBPGR Rice Germplasm Workshop (3rd : 1990 : IRRI).; International Rice Research Institute.; International Board for Plant Genetic Resources..
172 p. : ill.
Tipo: Book Palavras-chave: Germplasm collection; Germplasm conservation.
Ano: 1991 URL: http://hdl.handle.net/123456789/783
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THE DEMAND FOR CROP GENETIC RESOURCES: INTERNATIONAL USE OF THE U.S. NATIONAL PLANT GERMPLASM SYSTEM AgEcon
Smale, Melinda; Day-Rubenstein, Kelly A.; Zohrabian, Armineh; Hodgkin, T..
In contrast to a perception that ex situ collections of germplasm are rarely used, this empirical case study reveals large quantities of germplasm samples distributed by the U.S. National Germplasm System to many types of scientific institutions located in numerous countries around the world. Distributions favor developing countries in several ways including the numbers of samples shipped, utilization rates in crop breeding programs, and the secondary benefits brought about through sharing this germplasm with other scientists. Expected future demand is also greater among scientists in developing countries. These findings underscore the importance to global science and technology of retaining such resources in the public domain.
Tipo: Working or Discussion Paper Palavras-chave: Developing countries; Crop genetic resources; Plant breeding; Germplasm collection; Crop Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/16086
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The Origin, Development And Structure Of Demand For Plant Genetic Resources. The Impact Of The In Trust Agreements To The CGIAR Collections Availability AgEcon
Caracciolo, Francesco; Gotor, Elisabetta; Holloway, Garth J.; Watts, Jamie.
The objective of this paper is to explore how the demand of germplasm held by CGIAR genebanks changed over time in order to assess the possible influence of the 1994 In Trust Agreements on germplasm demand. The proposed theoretic model motivates the realistic hypothesis that the consequences of the In-Trust Agreements lead to an enhancement of CGIAR germplasm utilization. Therefore the paper firstly examines the classical literature on biodiversity’s valuation and its recent developments and subsequently it investigates the origin of the agricultural biodiversity’s economic value, providing a basic conceptual framework to infer on factors determining the demand for germplasm. Two Bayesian estimation frameworks are applied to the IRRI accessions...
Tipo: Conference Paper or Presentation Palavras-chave: Crop genetic resources; Germplasm collection; Search theoretic framework; Count data; Changepoints; O19; Q18; Q57; C11.
Ano: 2008 URL: http://purl.umn.edu/36773
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Total phenolics, flavonoids, tannins and antioxidant activity of lima beans conserved in a Brazilian Genebank Ciência Rural
Agostini-Costa,Tânia da Silveira; Teodoro,Ana Flávia Pádua; Alves,Rosa de Belem das Neves; Braga,Leandro Ribeiro; Ribeiro,Ieler Ferreira; Silva,Joseane Padilha; Quintana,Luciane Gomes; Burle,Marília Lobo.
The objective of this study was to characterize for the first time polyphenols and DPPH (2-diphenyl-1-picryhydrazyl radical) antioxidant activity in commonly cultivated accessions of Phaseolus lunatus from an ex situ germplasm collection maintained by Embrapa, in Brazil. Furthermore, the study aimed to detect changes in total polyphenols, total flavonoids and condensed tannin for the same accessions after regeneration in a greenhouse. The results showed the diversity of the lima bean collection for phenolic compounds, which were strongly correlated with antioxidant activity. Lima beans accessions with the highest polyphenols and antioxidant activity were those with colored seeds. Conservation through cold storage of P. lunatus seeds in a cold chamber in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus lunatus; Genetic resources; Germplasm collection; Leguminosae; Polyphenols.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200335
Registros recuperados: 12
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