Data/hora: 23/06/2024 17:43:07

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.
Thesagro: | Genética; Germoplasma; Melhoramento; Planta.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (15398-1) - ADC - SP - -- - S5572 -  - S5572 - DIS