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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
10/11/1993 |
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Data da última atualização: |
10/11/1993 |
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Autoria: |
GEPTS, P. |
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Afiliação: |
Department of Agronomy and Range Science University of California, Davis, CA 95616-8515. |
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Título: |
Genetic markers and core collections. |
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Ano de publicação: |
0 |
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Fonte/Imprenta: |
Davias, CA: University of California, s. d. |
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Páginas: |
2p. |
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Idioma: |
Inglês |
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Conteúdo: |
According to the definition of Franlel (1984), a core collection is a subest of the general or bulk collection that representants the genetic diversity of a crop species and its relatives with a minimum of repetitiveness. One of the essential questions, therefore, in the establishment of a core collection for a crop species is the determination of patterns and levels of genetic diversity in that species. This information then will guide the sampling process leading to the instituition of a core collection. For example, groups that are more diverse will require a storanger representation in the core collection than more unifom groups. Likewise, the sampling procedure should be capable of capturing locally abundant unusual variants. How does one then characterize the genetic diversity of a species? Various criteria have been suggested, including toxonomy, geography, ecology, characterisation data (including morphological, biochemical, and molecular markers), and agronomic evaluation data (Brown 1989). IN my presentation, l will discuss the role, advantages, and disvantagens of biochemical and molecular markers in the characterization of genetic diversity for the purpose of establishing a core collection. The main advantage of biochemical (isozymes, seed proteins) and molecular markers (RFLPs and PCR-based markers) is that they are genotypic markers. They directly reflect reflect mutational changes at the DNA level without influence from the environment and, hence, allow us to equate genotype and phenotype. MenosAccording to the definition of Franlel (1984), a core collection is a subest of the general or bulk collection that representants the genetic diversity of a crop species and its relatives with a minimum of repetitiveness. One of the essential questions, therefore, in the establishment of a core collection for a crop species is the determination of patterns and levels of genetic diversity in that species. This information then will guide the sampling process leading to the instituition of a core collection. For example, groups that are more diverse will require a storanger representation in the core collection than more unifom groups. Likewise, the sampling procedure should be capable of capturing locally abundant unusual variants. How does one then characterize the genetic diversity of a species? Various criteria have been suggested, including toxonomy, geography, ecology, characterisation data (including morphological, biochemical, and molecular markers), and agronomic evaluation data (Brown 1989). IN my presentation, l will discuss the role, advantages, and disvantagens of biochemical and molecular markers in the characterization of genetic diversity for the purpose of establishing a core collection. The main advantage of biochemical (isozymes, seed proteins) and molecular markers (RFLPs and PCR-based markers) is that they are genotypic markers. They directly reflect reflect mutational changes at the DNA level without influence from the environment and, hence, allow us to ... Mostrar Tudo |
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Palavras-Chave: |
Hibridos; Plantas. |
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Thesagro: |
Abacate; Colheita; População. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01972naa a2200193 a 4500
001 1646364
005 1993-11-10
008 bl --- 0-- u #d
100 1 $aGEPTS, P.
245 $aGenetic markers and core collections.
260 $c0
300 $a2p.
520 $aAccording to the definition of Franlel (1984), a core collection is a subest of the general or bulk collection that representants the genetic diversity of a crop species and its relatives with a minimum of repetitiveness. One of the essential questions, therefore, in the establishment of a core collection for a crop species is the determination of patterns and levels of genetic diversity in that species. This information then will guide the sampling process leading to the instituition of a core collection. For example, groups that are more diverse will require a storanger representation in the core collection than more unifom groups. Likewise, the sampling procedure should be capable of capturing locally abundant unusual variants. How does one then characterize the genetic diversity of a species? Various criteria have been suggested, including toxonomy, geography, ecology, characterisation data (including morphological, biochemical, and molecular markers), and agronomic evaluation data (Brown 1989). IN my presentation, l will discuss the role, advantages, and disvantagens of biochemical and molecular markers in the characterization of genetic diversity for the purpose of establishing a core collection. The main advantage of biochemical (isozymes, seed proteins) and molecular markers (RFLPs and PCR-based markers) is that they are genotypic markers. They directly reflect reflect mutational changes at the DNA level without influence from the environment and, hence, allow us to equate genotype and phenotype.
650 $aAbacate
650 $aColheita
650 $aPopulação
653 $aHibridos
653 $aPlantas
773 $tDavias, CA: University of California, s. d.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Tabuleiros Costeiros. Para informações adicionais entre em contato com cpatc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
09/10/2007 |
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Data da última atualização: |
12/02/2009 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Circulação/Nível: |
-- - -- |
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Autoria: |
SOBRAL, L. F.; FONTES JÚNIOR, R. C.; VIANA, R. D.; MARTINS, E. de S. |
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Afiliação: |
Lafayette Franco Sobral, Embrapa Tabuleiros Costeiros; Robinson Cruz Fontes Júnior, Embrapa Tabuleiros Costeiros; Robson Dantas Viana, Embrapa Tabuleiros Costeiros. |
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Título: |
Estimativa de índices de eficiência agronômica do flogopitito, brecha e ultramafica em um latossolo amarelo dos tabuleiros costeiros. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 31., 2007, Gramado. Conquistas e desafios da ciência do solo brasileira: livro de resumos. Gramado: UFRGS, 2007. |
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Páginas: |
p. 69 |
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Idioma: |
Português |
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Thesagro: |
Análise Química; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00676naa a2200181 a 4500
001 1372928
005 2009-02-12
008 2007 bl uuuu u00u1 u #d
100 1 $aSOBRAL, L. F.
245 $aEstimativa de índices de eficiência agronômica do flogopitito, brecha e ultramafica em um latossolo amarelo dos tabuleiros costeiros.
260 $c2007
300 $ap. 69
650 $aAnálise Química
650 $aSolo
700 1 $aFONTES JÚNIOR, R. C.
700 1 $aVIANA, R. D.
700 1 $aMARTINS, E. de S.
773 $tCONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 31., 2007, Gramado. Conquistas e desafios da ciência do solo brasileira: livro de resumos. Gramado: UFRGS, 2007.
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Embrapa Tabuleiros Costeiros (CPATC) |
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