scholarly journals Long-term selection experiment with Afrikaner cattle 4. Cow fertility and calf survival

2009 ◽  
Vol 39 (2) ◽  
Author(s):  
JB Van Wyk ◽  
LM Beffa ◽  
GJ Erasmus
Keyword(s):  
Selection Experiment ◽  
Term Selection ◽  
Calf Survival

Developing twinning cattle for commercial production

2008 ◽  
Vol 48 (7) ◽  
pp. 930 ◽  
Author(s):  
L. J. Cummins ◽  
C. A. Morris ◽  
B. W. Kirkpatrick
Keyword(s):  
United States ◽  
Production Systems ◽  
The United States ◽  
Research Centre ◽  
Commercial Application ◽  
Term Selection ◽  
Calf Survival ◽  
Potential Benefits ◽  
Meat Animal

Long-term selection programs in the United States and New Zealand have developed twinning herds. In Nebraska, the United States Meat Animal Research Centre population had a calving rate of 1.56 per parturition in 2004. They have shown that the location of ovulation has an important effect on the success of pregnancy and that ovulations ≥3 are probably undesirable. These cattle have issues associated with calving difficulty and calf survival, which present challenges for commercial application. Intensive management using existing technology and/or future genetic improvement to address these traits are required to realise the potential benefits to beef production systems.

Kyphoscoliosis in a Long-Term Selection Experiment with Chickens

1971 ◽  
Vol 15 (2) ◽  
pp. 376 ◽  
Author(s):  
Lewis W. Taylor
Keyword(s):  
Selection Experiment ◽  
Term Selection

scholarly journals Analysis of inbreeding depression in the first litter size of mice in a long-term selection experiment with respect to the age of the inbreeding

Heredity ◽  
2007 ◽  
Vol 99 (1) ◽  
pp. 81-88 ◽  
Author(s):  
D Hinrichs ◽  
T H E Meuwissen ◽  
J Ødegard ◽  
M Holt ◽  
O Vangen ◽  
...  
Keyword(s):  
Litter Size ◽  
Inbreeding Depression ◽  
Selection Experiment ◽  
Term Selection

Behavioural differences in non-reproductive adult females in a long-term selection experiment for litter size in mice

2000 ◽  
Vol 66 (3) ◽  
pp. 249-262 ◽  
Author(s):  
W.M Rauw ◽  
P Luiting ◽  
M Bakken ◽  
T Schuurman ◽  
C.J.M de Veer ◽  
...  
Keyword(s):  
Litter Size ◽  
Selection Experiment ◽  
Term Selection ◽  
Adult Females

Long-term selection experiment produces breakdown of horizontal transmissibility in parasite with mixed transmission mode

Evolution ◽  
2015 ◽  
Vol 69 (4) ◽  
pp. 1069-1076 ◽  
Author(s):  
Eike Dusi ◽  
Claire Gougat-Barbera ◽  
Thomas U. Berendonk ◽  
Oliver Kaltz
Keyword(s):  
Transmission Mode ◽  
Selection Experiment ◽  
Term Selection
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