Lopes, L S F; Schenkel, F S; Houlahan, K; Rochus, C M; Oliveira, G A; Oliveira, H R; Miglior, F; Alcantara, L M; Tulpan, D; Baes, C F (2024). Estimates of genetic parameters for rumination time, feed efficiency, and methane production traits in first lactation Holstein cows. (In Press). Journal of dairy science American Dairy Science Association 10.3168/jds.2023-23751
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The large-scale recording of traits such as feed efficiency and methane emissions for use in genetic improvement programs is complex, costly, and time-consuming. Therefore, heritable traits that can be continuously recorded in dairy herds and are correlated to feed efficiency and methane emission traits could provide useful information for genetic evaluation. Rumination time has been suggested to be associated with feed efficiency, methane production (methane emission in g/day), and production traits at the phenotypic level. Therefore, the objective of this study was to investigate the genetic relationships among rumination time, feed efficiency, methane and production traits using 7,358 records from 656 first lactation Holstein cows. The estimated heritabilities were moderate for rumination time (0.45 ± 0.14), methane production (0.36 ± 0.12), milk yield (0.40 ± 0.08), fat yield (0.29 ± 0.06), protein yield (0.32 ± 0.07), and energy corrected milk (0.28 ± 0.07), while low and non-significant for feed efficiency (0.15 ± 0.07), which was defined as the residual of the multiple linear regression of DMI on ECM and MBW. A favorable negative genetic correlation was estimated between rumination time and methane production (-0.53 ± 0.24), while a positive favorable correlation was estimated between rumination time and energy corrected milk (0.49 ± 0.11). The estimated genetic correlation of rumination time with feed efficiency (-0.01 ± 0.17) was not significantly different from zero but showed a trend of a low correlation with dry matter intake (0.21 ± 0.13, P = 0.11). These results indicate that rumination time is genetically associated with methane production and milk production traits, but high standard errors indicate that further analyses should be conducted to verify these findings when more data for rumination time, methane production and feed efficiency become available.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Institute of Genetics 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) |
UniBE Contributor: |
Baes, Christine Francoise |
Subjects: |
500 Science > 590 Animals (Zoology) 600 Technology > 630 Agriculture |
ISSN: |
0022-0302 |
Publisher: |
American Dairy Science Association |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
05 Feb 2024 11:18 |
Last Modified: |
05 Feb 2024 19:13 |
Publisher DOI: |
10.3168/jds.2023-23751 |
PubMed ID: |
38310964 |
Uncontrolled Keywords: |
feed efficiency heritability methane production rumination time |
BORIS DOI: |
10.48350/192583 |
URI: |
https://boris.unibe.ch/id/eprint/192583 |
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