| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
|
Data corrente: |
09/11/1993 |
|
Data da última atualização: |
09/11/1993 |
|
Autoria: |
GALWEY, N. W. |
|
Afiliação: |
University of Cambridge, U. K. |
|
Título: |
Verifying and validating the representativeness of a core collection |
|
Ano de publicação: |
0 |
|
Fonte/Imprenta: |
Cambridge, U.K. University of Cambridge, s. d. 2p. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The representativeness of a core collection can be defined in two ways: 1.how near it comes to containing the full range of variation present in the whole collection. 2. how closely the pattern of variation in the core resembles that in the whole collection. the utility of a core collection for plant breeding will be related to its representativeness according to the firts definition. However, the ease with which results from studies on the core colletion can be extrapolated to the whole collection will depend on its representativeness according to the second definition. It will usually be desirable to extrapolate further, and make inferences about the crop species as a whole. The ease with which this can be done will in tur depend on how closely the pattern of variation in the whole collection corresponds to that which exists (or formerly existed) in the field. Much of the discussion of core collections has in terms of conservation of alleles. This is helpful for theoretical formulation of the issues, but information about individual alleles will rerely by available, and in any case alleles do not occur independently. In the extreme case of a clonally propagated organism, it is a whole genotype which is included or omitted, with no prospect of recombination of its component alleles. But even in obligate outbreeders, alleles occur in linkage groups which are difficult to recombine. In practice in may be more helpful to think in terms of characters. A particular character in one genetic background may be of much. MenosThe representativeness of a core collection can be defined in two ways: 1.how near it comes to containing the full range of variation present in the whole collection. 2. how closely the pattern of variation in the core resembles that in the whole collection. the utility of a core collection for plant breeding will be related to its representativeness according to the firts definition. However, the ease with which results from studies on the core colletion can be extrapolated to the whole collection will depend on its representativeness according to the second definition. It will usually be desirable to extrapolate further, and make inferences about the crop species as a whole. The ease with which this can be done will in tur depend on how closely the pattern of variation in the whole collection corresponds to that which exists (or formerly existed) in the field. Much of the discussion of core collections has in terms of conservation of alleles. This is helpful for theoretical formulation of the issues, but information about individual alleles will rerely by available, and in any case alleles do not occur independently. In the extreme case of a clonally propagated organism, it is a whole genotype which is included or omitted, with no prospect of recombination of its component alleles. But even in obligate outbreeders, alleles occur in linkage groups which are difficult to recombine. In practice in may be more helpful to think in terms of characters. A particular character in... Mostrar Tudo |
|
Thesagro: |
Genética; Germoplasma; Melhoramento; Planta. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01983naa a2200169 a 4500
001 1646362
005 1993-11-09
008 bl --- 0-- u #d
100 1 $aGALWEY, N. W.
245 $aVerifying and validating the representativeness of a core collection
260 $c0
520 $aThe representativeness of a core collection can be defined in two ways: 1.how near it comes to containing the full range of variation present in the whole collection. 2. how closely the pattern of variation in the core resembles that in the whole collection. the utility of a core collection for plant breeding will be related to its representativeness according to the firts definition. However, the ease with which results from studies on the core colletion can be extrapolated to the whole collection will depend on its representativeness according to the second definition. It will usually be desirable to extrapolate further, and make inferences about the crop species as a whole. The ease with which this can be done will in tur depend on how closely the pattern of variation in the whole collection corresponds to that which exists (or formerly existed) in the field. Much of the discussion of core collections has in terms of conservation of alleles. This is helpful for theoretical formulation of the issues, but information about individual alleles will rerely by available, and in any case alleles do not occur independently. In the extreme case of a clonally propagated organism, it is a whole genotype which is included or omitted, with no prospect of recombination of its component alleles. But even in obligate outbreeders, alleles occur in linkage groups which are difficult to recombine. In practice in may be more helpful to think in terms of characters. A particular character in one genetic background may be of much.
650 $aGenética
650 $aGermoplasma
650 $aMelhoramento
650 $aPlanta
773 $tCambridge, U.K. University of Cambridge, s. d. 2p.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 6 | |
| Registros recuperados : 6 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
