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Titolo:
Body composition in non-reproductive adult males and females in a long-term selection experiment for litter size in mice
Autore:
Rauw, WM; Knap, PW; Verstegen, MWA; Luiting, P;
Indirizzi:
Agr Univ Norway, Dept Anim Sci, N-1432 As Nlh, Norway Agr Univ Norway As Nlh Norway N-1432 ept Anim Sci, N-1432 As Nlh, Norway
Titolo Testata:
JOURNAL OF ANIMAL BREEDING AND GENETICS-ZEITSCHRIFT FUR TIERZUCHTUNG UND ZUCHTUNGSBIOLOGIE
fascicolo: 3, volume: 118, anno: 2001,
pagine: 197 - 204
SICI:
0931-2668(200106)118:3<197:BCINAM>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESIDUAL FEED CONSUMPTION; FOOD RESOURCE-ALLOCATION; DIVERGENT SELECTION; LAYING HENS; GENETIC-VARIATION; DEVELOPMENTAL-TRENDS; CARCASS COMPOSITION; EGG-PRODUCTION; ANIMAL GROWTH; EFFICIENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Rauw, WM Agr Univ Norway, Dept Anim Sci, POB 5025, N-1432 As Nlh, Norway Agr Univ Norway POB 5025 As Nlh Norway N-1432 432 As Nlh, Norway
Citazione:
W.M. Rauw et al., "Body composition in non-reproductive adult males and females in a long-term selection experiment for litter size in mice", J ANIM BR G, 118(3), 2001, pp. 197-204

Abstract

Earlier studies have shown that adult mice from a line selected for high litter size (S-line), in particular females, had higher residual food intake(RFI) than mice from a non-selected control line (C-line). It was suggested bar this increase in RFI, in particular the mature selected females, may anticipate the metabolically stressful periods of pregnancy and lactation. The present study investigated whether body composition at maturity has been changed as a correlated response to selection, in order to support the offspring during pregnancy and lactation. Furthermore, part of the observed differences between individuals in RFI may be attributable to differing proportions of body protein and lipid. For these reasons, differences in body composition at maturity between males and females of the S-line and the C-line were investigated. Lipid percentage was similar for C-line animals and S-line females; S-line males had a significantly rower lipid percentage. Males had a higher protein percentage than females, in particular S-line males. The results show that body composition in adult non-reproductive females has not been affected as a correlated effect of selection for high litter size. Furthermore, the results suggest that the high lean content in S-line males may explain part of the high RFI compared with C-line animals. Body composition in S-line females probably does not explain the high RFI compared with S-line males and C-line animals. Factors other than protein and lipid levels must be responsible for the differences found between the lines and sexes in RFI.

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Documento generato il 19/09/20 alle ore 17:11:16