AI Article Synopsis
- The study aimed to explore the genetic links between methane (CH) production and traits like body conformation, fertility, and health in dairy cows across 10 Danish Holstein herds.
- Data was gathered from thousands of cows, measuring CH during milking and evaluating various traits such as insemination intervals and disease occurrences.
- Results showed low genetic correlations between CH and the traits evaluated, indicating a need for further research with a larger dataset to refine breeding goals related to CH production in dairy cattle.
Article Abstract
Our aim was to investigate the genetic correlations between CH production and body conformation, fertility, and health traits in dairy cows. Data were collected from 10 commercial Holstein herds in Denmark, including 5,758 cows with records for body conformation traits, 7,390 for fertility traits, 7,439 for health traits, and 1,397 with individual CH measurements. Methane production was measured during milking in automatic milking systems, using a sniffer approach. Correlations between CH and several different traits were estimated. These traits were interval between calving and first insemination, interval between first and last insemination, number of inseminations, udder diseases, other diseases, height, body depth, chest width, dairy character, top line, and body condition score. Bivariate linear models were used to estimate the genetic parameters within and between CH and the other traits. In general, the genetic correlations between CH and the traits investigated were low. The heritability of CH was 0.25, and ranged from 0.02 to 0.07 for fertility and health traits, and from 0.17 to 0.74 for body conformation traits. Further research with a larger data set should be performed to more accurately establish how CH relates to fertility, health, and body conformation traits in dairy cattle. This will be useful in the design of future breeding goals that consider the production of CH.
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| http://dx.doi.org/10.3168/jds.2017-13402 | DOI Listing |
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