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Registros recuperados: 8
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A core subset of Brazilian maize germplasm. Repositório Alice
ABADIE, T.; ANDRADE, R.V. de; CORDEIRO, C.; MAGALHAES, J.R.; PARENTONI, S. N..
1999
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Milho; Germoplasma; Melhoramento; Brasil; Brazil; Zea mays; Core collection; Germplasm; Breeding.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/483563
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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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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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Extracting samples of high diversity from thematic collections of large gene banks using a genetic-distance based approach. Repositório Alice
PESSOA-FILHO, M.; RANGEL, P. H. N.; FERREIRA, M. E..
Background Breeding programs are usually reluctant to evaluate and use germplasm accessions other than the elite materials belonging to their advanced populations. The concept of core collections has been proposed to facilitate the access of potential users to samples of small sizes, representative of the genetic variability contained within the gene pool of a specific crop. The eventual large size of a core collection perpetuates the problem it was originally proposed to solve. The present study suggests that, in addition to the classic core collection concept, thematic core collections should be also developed for a specific crop, composed of a limited number of accessions, with a manageable size. Results The thematic core collection obtained meets the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Variabilidade genética.; Core collection; Arroz; Oryza sativa; Banco de germoplasma; Biodiversidade; Gene banks.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/867069
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In-depth genome characterization of a Brazilian common bean core collection using DArTseq high-density SNP genotyping. Repositório Alice
VALDISSER, P. A. M. R.; PEREIRA, W. J.; ALMEIDA FILHO, J. E.; MÜLLER, B. S. F.; COELHO, G. R. C.; MENEZES, I. P. P. de; VIANNA, J. P. G.; ZUCCHI, M. I.; LANNA, A. C.; COELHO, A. S. G.; OLIVEIRA, J. P. de; MORAES, A. da C.; BRONDANI, C.; VIANELLO, R. P..
Background: Common bean is a legume of social and nutritional importance as a food crop, cultivated worldwide especially in developing countries, accounting for an important source of income for small farmers. The availability of the complete sequences of the two common bean genomes has dramatically accelerated and has enabled new experimental strategies to be applied for genetic research. DArTseq has been widely used as a method of SNP genotyping allowing comprehensive genome coverage with genetic applications in common bean breeding programs. Results: Using this technology, 6286 SNPs (1 SNP/86.5 Kbp) were genotyped in genic (43.3%) and non-genic regions (56. 7%). Genetic subdivision associated to the common bean gene pools (K = 2) and related to grain...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Diversity arrays technology; Diversity analysis; Loci under selection; Core collection; Feijão; Phaseolus vulgaris; Genética vegetal; Linkage disequilibrium; Genotyping; Single nucleotide polymorphism.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1076278
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Inorganic Nutritional Composition of Common Bean (Phaseolus vulgaris L.) Genotypes Race Chile Chilean J. Agric. Res.
Paredes C,Mario; Becerra V,Viviana; Tay U,Juan.
The current Chilean bean (Phaseolus vulgaris L.) collection is about 1110 accessions. To facilitate the characterization of this germplasm a core collection of 246 accessions was formed. Little information exists about the mineral content and other quality traits for those bean genotypes. This information could be useful to determine their quality and to promote its consumption. The objective of this work was to evaluate the variability for macro and micronutrients of a representative bean sample from a Chilean core collection and to compare them with representatives from other races. The results indicated the presence of a wide variability for some macro and micronutrients, such as N, Fe, and Zn. The protein content varied from 183.5 to 259.7 g kg-1, Fe...
Tipo: Journal article Palavras-chave: Race Chile; Macronutrients; Micronutrients; Core collection.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000400002
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Using genetic diversity information to establish core collections of Stylosanthes capitata and Stylosanthes macrocephala. Repositório Alice
SANTOS-GARCIA, M. O.; TOLEDO-SILVA, G. de; SASSAKI, R. P.; FERREIRA, T. H.; RESENDE, R. M. S.; CHIARI, L.; KARIA, C. T.; CARVALHO, M. A.; FALEIRO, F. G.; ZUCCHI, M. I.; SOUZA, A. P. de.
Stylosanthes species are important forage legumes in tropical and subtropical areas. S. macrocephala and S. capitata germplasm collections that consist of 134 and 192 accessions, respectively, are maintained at the Brazilian Agricultural Research Corporation Cerrados (Embrapa-Cerrados). Polymorphic microsatellite markers were used to assess genetic diversity and population structure with the aim to assemble a core collection. The mean values of HO and HE for S. macrocephala were 0.08 and 0.36, respectively, whereas the means for S. capitata were 0.48 and 0.50, respectively. Roger?s genetic distance varied from 0 to 0.83 for S. macrocephala and from 0 to 0.85 for S. capitata. Analysis with STRUCTURE software distinguished five groups among the S....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Stylosanthes; Tropical forage; Microsatellites; Genetic diversity; Core collection.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/946145
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應用核酸逢機增殖多型性分子標記進行番椒屬種原核心收集遺傳歧異之研究 Taiwan Agricultural Research Institute
范明仁; 陳述; L. M. Engle; Ming-Jen Fan; Shu Chen.
[[abstract]]本研究之主要目的為針對利用性狀調查資料所建立的番椒屬種原核心收集,期望藉由RAPD分子標記,就分子層次瞭解該種原核心收集的遺傳歧異結構。本研究以16個逢機引子,針對番椒屬種原核心收集的264份種原進行RAPD分析,並據此進行集群分析結果發現,由兩群間最小距離 (Mini Distance; MD) 於0.83為分群依據時,可明顯的將番椒屬種原核心收集區分為5個子群,其中C. annuum 的種原有92%集中在第1子群,C. baccatum 亦有92%的種原集中在第4子群,C. chinense 的種原為86%集中在第2子群,C. frutescens 為86%的種原集中在第3子群,而C. chacoense 則是全部的參試種原皆集中於第5子群,顯示就分子層次而言,番椒屬內各不同“種”別的種原間具有顯著的遺傳歧異,因此在建立番椒屬種原核心收集時,應以儘量包含不同“種”別的種原為考量。針對同一“種”別之種原研究結果發現,仍有少部份的種原會散佈至其它子群中,顯示“種”內亦具有相當程度的歧異分化存在,以保存寬廣之遺傳歧異的觀點而言,這些具有歧異分化的種原納入在種原核心收集中是相當有意義的。經由 Shannon-Weaver 歧異指數之估算發現,第1子群(主要成員為C. annuum)歧異指數較低(為0.783),顯示群內種原間的遺傳相似性較其它群為高,研究認為應可藉由RAPD分子標記針對該群種原進行再篩減,以形成更具代表性的種原核心收集。因此本研究應用RAPD分析探討番椒屬種原核心收集之結果顯示,藉由分子標記不但有助於瞭解分子層次的遺傳歧異結構,並可應用於輔助種原核心收集之建立。
Palavras-chave: 番椒屬 核心收集 核酸逢機增殖多型性 遺傳歧異 Capsicum; Core collection; RAPD; Genetic diversity [[classification]]9.
Ano: 2004
Registros recuperados: 8
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