PMID- 25981071
OWN - NLM
STAT- MEDLINE
DCOM- 20160331
LR  - 20190318
IS  - 1525-3198 (Electronic)
IS  - 0022-0302 (Linking)
VI  - 98
IP  - 7
DP  - 2015 Jul
TI  - Short communication: Genetic analysis for fertility traits of heifers and cows 
      from smallholder dairy farms in a tropical environment.
PG  - 4990-8
LID - S0022-0302(15)00324-0 [pii]
LID - 10.3168/jds.2014-8866 [doi]
AB  - The objective of this study was to estimate genetic parameters for various 
      fertility traits on Holstein upgraded dairy heifers and cows in a smallholder 
      system under tropical conditions using data sets from the Thailand national 
      recording scheme. The investigated traits were age at first service (AFS), age at 
      first calving (AFC), days from calving to first service (DTFS), days between 
      first and last service (DFLS), days open (DO), calving interval (CI), number of 
      services per conception (NSPC), and conception at first service (FSC). The data 
      consisted of 68,555, 34,401, and 54,004 records on heifers, primiparous, and 
      multiparous cows, respectively, calving between 1996 and 2011. Gibbs sampling was 
      employed to obtain (co)variance components using both univariate and bivariate 
      analyses with linear and threshold animal models. Virgin heifers had better 
      fertility performance than primiparous and multiparous cows. The reproductive 
      performance in primiparous cows was inferior compared with multiparous cows. Cows 
      with higher Holstein-Friesian blood showed lower reproductive efficiency. 
      Estimated heritabilities for most of the fertility traits were 0.04 or less 
      except for AFS (0.26) and AFC (0.25). The estimated genetic correlations among 
      fertility traits within parity indicated that selection for cows with high 
      conception rate could lead to shortened DO and CI, as well as DTFS. The FSC and 
      NSPC could be used as the best indicators for heifer and cow fertility and could 
      be complemented by other traits, which were genetically considered as different 
      traits such as DTFS and DFLS in terms of a fertility index. This would enable 
      efficient selection for better fertility. Genetic correlations for fertility 
      traits in primiparous and multiparous cows were very high (>0.90), but those 
      between heifers and cows were lower (0.03 to 0.83). The latter results indicated 
      that fertility traits of heifers and cows should be considered as different 
      traits.
CI  - Copyright (c) 2015 American Dairy Science Association. Published by Elsevier Inc. 
      All rights reserved.
FAU - Buaban, S
AU  - Buaban S
AD  - The Bureau of Biotechnology in Livestock Production, Department of Livestock 
      Development, Pratumtani 12000, Thailand. Electronic address: 
      buaban_ai@hotmail.com.
FAU - Duangjinda, M
AU  - Duangjinda M
AD  - Department of Animal Science, Khon Kaen University, Meaung, Khon Kaen 40002, 
      Thailand.
FAU - Suzuki, M
AU  - Suzuki M
AD  - Department of Life Science and Agriculture, Obihiro University of Agriculture and 
      Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
FAU - Masuda, Y
AU  - Masuda Y
AD  - Department of Life Science and Agriculture, Obihiro University of Agriculture and 
      Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
FAU - Sanpote, J
AU  - Sanpote J
AD  - The Bureau of Biotechnology in Livestock Production, Department of Livestock 
      Development, Pratumtani 12000, Thailand.
FAU - Kuchida, K
AU  - Kuchida K
AD  - Department of Animal and Food Hygiene, Obihiro University of Agriculture and 
      Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20150514
PL  - United States
TA  - J Dairy Sci
JT  - Journal of dairy science
JID - 2985126R
SB  - IM
MH  - Animals
MH  - Cattle/genetics/*physiology
MH  - *Dairying
MH  - Female
MH  - *Fertility
MH  - Hybridization, Genetic
MH  - Insemination, Artificial/veterinary
MH  - Thailand
MH  - *Tropical Climate
OTO - NOTNLM
OT  - Holstein upgraded
OT  - genetic parameters
OT  - reproduction
OT  - tropics
EDAT- 2015/05/20 06:00
MHDA- 2016/04/01 06:00
CRDT- 2015/05/19 06:00
PHST- 2014/09/17 00:00 [received]
PHST- 2015/03/27 00:00 [accepted]
PHST- 2015/05/19 06:00 [entrez]
PHST- 2015/05/20 06:00 [pubmed]
PHST- 2016/04/01 06:00 [medline]
AID - S0022-0302(15)00324-0 [pii]
AID - 10.3168/jds.2014-8866 [doi]
PST - ppublish
SO  - J Dairy Sci. 2015 Jul;98(7):4990-8. doi: 10.3168/jds.2014-8866. Epub 2015 May 14.