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Full-Text Articles in Life Sciences
Genetics Of The Interval From Weaning To Estrus In First-Litter Sows: Correlated Responses, J. Ten Napel, T. H. E. Meuwissen, R. K. Johnson, E. W. Brascamp
Genetics Of The Interval From Weaning To Estrus In First-Litter Sows: Correlated Responses, J. Ten Napel, T. H. E. Meuwissen, R. K. Johnson, E. W. Brascamp
Department of Animal Science: Faculty Publications
The objective of this study was to evaluate relationships between rebreeding performance and growth performance (n = 3,777 gilts) and rebreeding performance and reproductive performance (n = 2,242 sows). Our data were from a selection experiment for shorter intervals from weaning to estrus after the first parity (IWE), involving Dutch Landrace pigs, in which a selection line and a control line without selection were maintained for eight generations. Relationships were evaluated before and after transforming IWE to normal interval (NI; IWE &#; 7 d), prolonged interval (PI; IWE > 7 d), and incidence of a prolonged interval (INC). Heritabilities of NI, …
Multiple Duplications Of Yeast Hexose Transport Genes In Response To Selection In A Glucose-Limited Environment, Celeste J. Brown, Kristy M. Todd, R. Frank Rosenzweig
Multiple Duplications Of Yeast Hexose Transport Genes In Response To Selection In A Glucose-Limited Environment, Celeste J. Brown, Kristy M. Todd, R. Frank Rosenzweig
Biological Sciences Faculty Publications
When microbes evolve in a nutrient-limited environment, natural selection can be predicted to favor genetic changes that give cells greater access to limiting substrate. We analyzed a population of baker's yeast that underwent 450 generations of glucose-limited growth. Relative to the strain used as the inoculum, the predominant cell type at the end of this experiment sustains growth at significantly lower steady-state glucose concentrations and demonstrates markedly enhanced cell yield per mole glucose, significantly enhanced high-affinity glucose transport, and greater relative fitness in pairwise competition. These changes are correlated with increased levels of mRNA hybridizing to probe generated from the …
Effects Of Selection For High Body Weight And Age Of Hen Onegg Characteristics In Japanese Quail (Coturnix Coturnix Japonica), Özge Altan, İsmail Oğuz, Yavuz Akbaş
Effects Of Selection For High Body Weight And Age Of Hen Onegg Characteristics In Japanese Quail (Coturnix Coturnix Japonica), Özge Altan, İsmail Oğuz, Yavuz Akbaş
Turkish Journal of Veterinary & Animal Sciences
The present study was conductud on qualis ( Coturnix coturnix japonica) to evaluate the effects of line and age of bird on egg characteristics. Total ninety Japanese quail from unselected (C) and selected (S) for high 4-week body weight for five generations were used. All birds were weighed individually at 10, 14 and 18-week of age and egg characteristics were obtained on all eggs collected during these weeks. The results showed that egg weight was increased by selection for high 4-week body weight and egg weight differences between the lines was due to increases in yolk and albumen weight of …