Related Experiment Video
Updated: Aug 10, 2026

Providing Meaningful Environmental Enrichment and Measuring Saliva Cortisol in Pigs Housed on Slatted Flooring
Published on: September 30, 2019
[Relationship between climatic factors and wannanhua sow's reproductivity]
1Department of Animal Science, Anhui Agricultural University, Hefei 230036.
Abstract:
Data on reproductive traits of 670 litters of different Am genotypes Wannanhua sow under different climatic conditions were analyzed by the least square model in order to investigate the effects of the climate factors and the Am genotypes on sow's reproductivity. The results showed that the reproductive performance of sow depended on the monthly change of climate regularly. High temperature from July to September had worse effect on sow's reproductivity, especially (P < 0.05). A certain variation existed among reproductive performances of Wannanhua sows at Am loci. AmAB's was better, followed by AmAA, then AmBB and AmBC were poor. But the variance was in significant (P > 0.05). Furthermore, there was strong interactive effect between Am genotypes and the breeding season. In addition, the litter size, the number of live born and the number of weaning pig had a negative correlation with the mean air temperature and photoperiod significantly (P < 0.05 or P < 0.01).
Related Concept Videos
Energy Budgets and Reproductive Strategies
What is Climate?
Adaptations that Reduce Water Loss
Responses to Heat and Cold Stress
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Wald-Wolfowitz Runs Test II
For binary data, runs are identified using symbols such as + and −, or equivalently, 1s and 0s. In...

