J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by van Engelen, M. A.
Right arrow Articles by Ribeiro, E. L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by van Engelen, M. A.
Right arrow Articles by Ribeiro, E. L.

Journal of Animal Science, Vol 73, Issue 7 1948-1953, Copyright © 1995 by American Society of Animal Science

JOURNAL ARTICLE

Differences in pup birth weight, pup variability within litters, and dam weight of mice selected for alternative criteria to increase litter size

M. A. van Engelen, M. K. Nielsen and E. L. Ribeiro
University of Nebraska-Lincoln 68583-0908, USA.

Selection for litter size had been practiced for 21 generations and relaxed selection for 13 generations in mice. Three replicates were used with four selection criteria: index of components (ovulation rate and ova success), uterine capacity, litter size, and an unselected control. Especially with selection for litter size and the index relative to the control, number of pups born had increased, and differences also occurred in mating weight. Dams of the three replicates and their litters were used to evaluate the effects of accumulated selection on pup birth weight, variability in weight of littermates, and dam's weight at mating and after littering. Total number born, number born alive, number of males, and number of females were also recorded and studied. Mean pup birth weight did not differ among the criteria; however, variability among littermates in pup weight tended to differ among criteria of selection. Regressions for pup weight and within-litter standard deviation of pup weight on number born were small and negative but significant (P < .001). The distribution of pup weight within litter was normal for 77.2% of the litters, with no differences among the criteria. The difference between weight of male and weight of female pups was significant (P < .001); overall males were 2.5% heavier than females. There was a difference (P < .02) among criteria in mating weight and littering weight; however, the maternal weight gain between mating and littering was not different among criteria. Number born differed (P < .003) among the criteria, but there was no significant difference among criteria in numbers of males and females.(ABSTRACT TRUNCATED AT 250 WORDS)


This article has been cited by other articles:


Home page
 ReproductionHome page
P. Pallares, R. A Garcia-Fernandez, L. M Criado, C. A Letelier, D. Esteban, J. M Fernandez-Toro, J. M Flores, and A. Gonzalez-Bulnes
Disruption of the endothelial nitric oxide synthase gene affects ovulation, fertilization and early embryo survival in a knockout mouse model
Reproduction, November 1, 2008; 136(5): 573 - 579.
[Abstract] [Full Text] [PDF]

Home page
 ReproductionHome page
M Holt, O Vangen, and W Farstad
Components of litter size in mice after 110 generations of selection
Reproduction, May 1, 2004; 127(5): 587 - 592.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1995 by the American Society of Animal Science.