scholarly journals Genetic merit for fertility traits in Holstein cows: I. Production characteristics and reproductive efficiency in a pasture-based system

2012 ◽  
Vol 95 (3) ◽  
pp. 1310-1322 ◽  
Author(s):  
S.B. Cummins ◽  
P. Lonergan ◽  
A.C.O. Evans ◽  
D.P. Berry ◽  
R.D. Evans ◽  
...  
Keyword(s):  
Holstein Cows ◽  
Reproductive Efficiency ◽  
Genetic Merit ◽  
Fertility Traits ◽  
Production Characteristics

scholarly journals Genetic merit for fertility traits in Holstein cows: VI. Oocyte developmental competence and embryo development

2019 ◽  
Vol 102 (5) ◽  
pp. 4651-4661 ◽  
Author(s):  
S.G. Moore ◽  
S.B. Cummins ◽  
S. Mamo ◽  
P. Lonergan ◽  
T. Fair ◽  
...  
Keyword(s):  
Embryo Development ◽  
Developmental Competence ◽  
Holstein Cows ◽  
Genetic Merit ◽  
Oocyte Developmental Competence ◽  
Fertility Traits

scholarly journals Genetic merit for fertility traits in Holstein cows: V. Factors affecting circulating progesterone concentrations

2014 ◽  
Vol 97 (9) ◽  
pp. 5543-5557 ◽  
Author(s):  
S.G. Moore ◽  
S. Scully ◽  
J.A. Browne ◽  
T. Fair ◽  
S.T. Butler
Keyword(s):  
Holstein Cows ◽  
Factors Affecting ◽  
Genetic Merit ◽  
Fertility Traits

Fluctuation of Reproductive Efficiency Traits of Holstein Cows in the Tokachi Area, Hokkaido

1982 ◽  
Vol 53 (12) ◽  
pp. 792-796
Author(s):  
Yoshinori TERAWAKI ◽  
Koji MUTO ◽  
Hitoshi ONO
Keyword(s):  
Holstein Cows ◽  
Reproductive Efficiency

Effect of fixed-time embryo transfer on reproductive efficiency in high-producing repeat-breeder Holstein cows

2010 ◽  
Vol 118 (2-4) ◽  
pp. 110-117 ◽  
Author(s):  
C.A. Rodrigues ◽  
A.A. Teixeira ◽  
R.M. Ferreira ◽  
H. Ayres ◽  
R.F. Mancilha ◽  
...  
Keyword(s):  
Embryo Transfer ◽  
Fixed Time ◽  
Holstein Cows ◽  
Reproductive Efficiency ◽  
Repeat Breeder

scholarly journals Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows

2012 ◽  
Vol 57 (No. 3) ◽  
pp. 108-114 ◽  
Author(s):  
V. Zink ◽  
J. Lassen ◽  
M. Štípková
Keyword(s):  
Milk Production ◽  
Genetic Parameters ◽  
Selection Index ◽  
Female Fertility ◽  
Holstein Cows ◽  
Production Traits ◽  
Milk Production Traits ◽  
Clear Trend ◽  
Genetic Potential ◽  
Fertility Traits

The aim of this study was to estimate genetic parameters for female fertility and production traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the accuracy of a selection index in seven different scenarios. In order to estimate genetic (co)variance components, the DMU software running an AI-REML algorithm was used. The analyses were made using a series of bivariate animal models. The pedigree included 164 125 animals and it was set up using a pruned animal model design. The present study included the following female fertility traits for the first lactations: calving to the first insemination (CF), days open (DO), calving from the first to the last insemination (FL), and milk production traits: milk production (MLK), kg of fat (FAT), and kg of protein (PROT). The heritability for all the investigated fertility traits was low and close to 0. Moderate heritabilities for production traits ranging from 0.20 (MLK) to 0.23 (PROT) were estimated. The strongest unfavourable correlation was found between PROT and DO (0.49). Other estimated correlations between fertility traits and production traits were moderate, ranging from 0.26 to 0.41. The results of this study evidence that cows with the poorest genetic potential for reproductive performance are those having high genetic potential for milk production and milk components. The results also show that the number of days from calving to new pregnancy depends on the production level. Seven investigated scenarios using selection index theory show a clear trend for increasing accuracy when more fertility traits were added as well as when higher numbers of daughters with information on reproduction traits per sire were available.  

Polymorphisms within the prolactin and growth hormone/insulin-like growth factor-1 functional pathways associated with fertility traits in Holstein cows raised in a hot-humid climate

2018 ◽  
Vol 50 (8) ◽  
pp. 1913-1920 ◽  
Author(s):  
Jose C. Leyva-Corona ◽  
Javier R. Reyna-Granados ◽  
Ricardo Zamorano-Algandar ◽  
Miguel A. Sanchez-Castro ◽  
Milton G. Thomas ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Growth Factor ◽  
Holstein Cows ◽  
Insulin Like Growth Factor ◽  
Humid Climate ◽  
Functional Pathways ◽  
Hot Humid Climate ◽  
Fertility Traits
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