|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
01/08/1992 |
|
Data da última atualização: |
11/12/2023 |
|
Autoria: |
LUSH, J. L. |
|
Título: |
Chance as a cause of changes in gene frequency within pure breeds of livestock. |
|
Ano de publicação: |
1946 |
|
Fonte/Imprenta: |
The American Naturalist, v. 80, n. 792, p. 318-342, May./Jun. 1946. |
|
DOI: |
10.1086/281448 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: Chance deviations in gene frequency from one generation to the next, as a result of Mendelian sampling and the elimination of potential parents, are important in the pure breeds of livestock. Standard deviations of the order of .02 to .05 for gene frequencies near .5 seem to be about the usual magnitude of these chance changes in one generation. The major cause for these changes being so much larger than would be required automatically by the finite size of the population seems to be inequality in the number of gametes which the various potential parents actually contribute to the next generation. Attention to family and pedigree, plus the economic incidents which happen to whole herds, probably emphasize this more in livestock than is usual in most species in nature, although this statement about pure-bred live-stock as compared with wild species is an expression of faith which might be severely shaken if we knew more about the actual pedigrees of wild organisms! |
|
Palavras-Chave: |
Frequencia genica. |
|
Thesagro: |
Animal; Melhoramento. |
|
Thesaurus Nal: |
Animal breeding; Gene frequency; Livestock. |
|
Categoria do assunto: |
G Melhoramento Genético |
|
Marc: |
LEADER 01590naa a2200205 a 4500
001 1521222
005 2023-12-11
008 1946 bl uuuu u00u1 u #d
024 7 $a10.1086/281448$2DOI
100 1 $aLUSH, J. L.
245 $aChance as a cause of changes in gene frequency within pure breeds of livestock.$h[electronic resource]
260 $c1946
520 $aAbstract: Chance deviations in gene frequency from one generation to the next, as a result of Mendelian sampling and the elimination of potential parents, are important in the pure breeds of livestock. Standard deviations of the order of .02 to .05 for gene frequencies near .5 seem to be about the usual magnitude of these chance changes in one generation. The major cause for these changes being so much larger than would be required automatically by the finite size of the population seems to be inequality in the number of gametes which the various potential parents actually contribute to the next generation. Attention to family and pedigree, plus the economic incidents which happen to whole herds, probably emphasize this more in livestock than is usual in most species in nature, although this statement about pure-bred live-stock as compared with wild species is an expression of faith which might be severely shaken if we knew more about the actual pedigrees of wild organisms!
650 $aAnimal breeding
650 $aGene frequency
650 $aLivestock
650 $aAnimal
650 $aMelhoramento
653 $aFrequencia genica
773 $tThe American Naturalist$gv. 80, n. 792, p. 318-342, May./Jun. 1946.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
