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Food resource allocation patterns in lactating females in a long-term selection experiment for litter size in mice
Rauw, W.M. ; Knap, P.W. ; Verstegen, M.W.A. ; Luiting, P. - \ 2002
Genetics, Selection, Evolution 34 (2002)1. - ISSN 0999-193X - p. 83 - 104.
Resource allocation patterns, as quantified by residual food intake (RFI), and the consequences for offspring development were investigated during lactation in 96 females of a mouse line selected for 104 generations for high litter size at birth (S-line) and in 87 females of a non-selected control line (C-line). Litters of 45 C-line dams (Cs) and 48 S-line dams (Ss) were standardised (s) at birth; other dams (ns) supported total number of pups born (Cns and Sns, respectively). RFI during lactation was significantly lower in Sns-dams than in C-line dams and Sns-dams. After weaning Sns-dams seemed to be able to restore the negative resource situation. Sns-pups were about 25␕ess mature than Cns-pups at all times. Maturity was similar for Cs- and Ss-pups from 2 d in lactation on, and about 18nd 53␑igher than Cns- and Sns-pups. The pre-weaning mortality rate was significantly higher in Sns-litters ( ) than in Cns-litters ( ). The results suggest that S-line dams allocated considerably more resources to maintenance of offspring than C-line dams. This was insufficient to provide the offspring with an adequate amount of resources, resulting in reduced pup development and increased pre-weaning mortality rates.
|Changes in food resource allocation patterns with selection for litter size - a mouse model
Rauw, W.M. - \ 2001
Wageningen University. Promotor(en): Martin Verstegen, co-promotor(en): P.W. Knap; P.L. Luiting. - - 141 p.
Body composition in non reproduction adult males and females in long-term selection experiment for litter in mice
Rauw, W.M. ; Knap, P.W. ; Verstegen, M.W.A. ; Luiting, P. - \ 2001
Journal of Animal Breeding and Genetics 118 (2001). - ISSN 0931-2668 - p. 197 - 201.
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 that 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 lower 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.
|Differences in food resource allocation patterns in a long-term selection experiment for littersize in mice.II. Developmental trends in body weight against food intake
Rauw, W.M. ; Luiting, P. ; Verstegen, M.W.A. ; Vangen, O. ; Knap, P.W. - \ 2000
Animal Science 71 (2000)1. - ISSN 1357-7298 - p. 39 - 47.
|Differences in food resources allocation patterns in a long-term selection experiment for litter size in mice. I. Developmental trends in body weight and food intake against time
Rauw, W.M. ; Luiting, P. ; Verstegen, M.W.A. ; Vangen, O. ; Knap, P.W. - \ 2000
Animal Science 71 (2000)1. - ISSN 1357-7298 - p. 31 - 38.
Selection for litter size and its consequences for the allocation of feed resources : A concept and its implications illustrated by mice selection experiments
Rauw, W.M. ; Luiting, P. ; Beilharz, R.G. ; Verstegen, M.W.A. ; Vangen, O. - \ 1999
Livestock Production Science 60 (1999). - ISSN 0301-6226 - p. 329 - 342.
|Effect of feed protein content on genetic correlation of production with efficiency.
Luiting, P. ; Verstegen, M.W.A. ; Brascamp, E.W. - \ 1995
In: Proc. 46th Annual Meeting EAAP, Prague Wageningen Pers - p. 55 - 55.
|A biological approach to examine genetic variation in weaning-to-oestrus interval in first-litter sows based on a review.
Napel, J. ten; Kemp, B. ; Luiting, P. ; Vries, A.G. de - \ 1995
Livestock Production Science 41 (1995). - ISSN 0301-6226 - p. 81 - 93.
|Genetics of the interval from weaning to estrus in first-litter sows: distribution of data, direct response of selection, and heritability.
Napel, J. ten; Vries, A.G. de; Buiting, G.A.J. ; Luiting, P. ; Merks, J.W.M. ; Brascamp, E.W. - \ 1995
Journal of Animal Science 73 (1995). - ISSN 0021-8812 - p. 2193 - 2203.
|Differences in energy metabolism between chickens of white leghorn laying hens selected for high and low residual feed consumption.
Boekholt, H.A. ; Luiting, P. - \ 1994
In: Proc. 13th Symp. Energy Metabolism of Farm Animals, J.F. Aguilera (ed.). Mojacar, Spain, EEAP publ. 76 - p. 281 - 284.
Between animal variation in biological efficiency as related to residual feed consumption.
Luiting, P. ; Urff, E.M. ; Verstegen, M.W.A. - \ 1994
Netherlands Journal of Agricultural Science 42 (1994). - ISSN 0028-2928 - p. 59 - 67.
Production levels in livestock (cattle, pigs and poultry) have been increased considerably, with a correlated increase in gross feed efficiency. However, mature body weight has also increased, leading to higher maintenance costs. Thus, net feed efficiency has been little improved. Breeding for lower body weight has not been successful, but there are possibilities for reduction of feed consumption independent of production and body weight (residual feed consumption). It is as yet uncertain to what extent animal stress susceptibility will be affected by changes in residual feed consumption.
|Selection for feed efficiency and consequences for stress susceptibility.
Luiting, P. ; Decuypere, E. ; Groot, P.N. de; Buyse, J. ; Room, G. - \ 1994
In: Abstract 45th Annual meeting EAAP. Edinburgh - p. 104 - 104.
|Correlated metabolic responses in a divergent selection experiment on residual feed intake in White leghorns.
Luiting, P. - \ 1994
In: Proc. 9th Eur. Poultry Conf. Glasgow (1994) vol.2 - p. 244 - 247.
Thermal requirements of young calves during standing and lying.
Schrama, J.W. ; Arieli, A. ; Brandsma, H.A. ; Luiting, P. ; Verstegen, M.W.A. - \ 1993
Journal of Animal Science 71 (1993). - ISSN 0021-8812 - p. 3285 - 3292.
|The nature of genetic variation in residual feed consumption.
Luiting, P. ; Boekholt, P.G.J.J. van; Hel, W. van der; Verstegen, M.W.A. - \ 1993
In: Abstract 44th Ann. Meeting EAAP, Aarhus, Denmark, Vol.1, G4.3 - p. 216 - 217.
|Relationships between feed intake pattern and residual feed intake in group housed growing pigs.
Haer, L.C.M. de; Luiting, P. ; Aarts, H.L.M. - \ 1993
Livestock Production Science 36 (1993). - ISSN 0301-6226 - p. 233 - 253.
|Between animal variation in biological efficiency as related to residual feed consumption.
Luiting, P. ; Urff, E.M. ; Verstegen, M.W.A. - \ 1993
In: Abstract Zodiac Symp. Biological basis of sustainable animal production, Wageningen - p. 8 - 9.
|Restfutterverzehr bei Legehennen.
Luiting, P. - \ 1992
Lohmann Information (1992). - ISSN 1617-2892 - p. 15 - 22.
|Breed differences in maintenance requirements in pigs measured by computer tomography.
Luiting, P. ; Enting, H. ; Vangen, O. - \ 1992
In: Abstract 43rd Ann. Meeting EAAP, Madrid, Vol. 1 - p. 164 - 165.
|Proof of equivalence of selection containing traits adjusted for each other.
Luiting, P. ; Werf, J.H.J. van der; Meuwissen, T.H.E. - \ 1992
In: Abstract 43rd Ann. Meeting EAAP, Madrid, Vol. 1 - p. 146 - 147.