Bos taurus vs. Bos indicus - Beef Improvement Federation
Bos taurus vs. Bos indicus - Beef Improvement Federation
Bos taurus vs. Bos indicus - Beef Improvement Federation
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<strong>Beef</strong> Cow Synchronization<br />
Anestrus in US beef cattle at start of<br />
synchronization<br />
Suckling calf<br />
Decreased percentage of estrous cycling cows at breeding<br />
Synchronization response<br />
• Dependent on nutritional status pre-calving<br />
Percentage cycling<br />
Range<br />
8-69%<br />
2212 cows<br />
12 locations<br />
69 dpp<br />
Range<br />
17-67%<br />
851 cows<br />
6 locations<br />
56 dpp<br />
Lucy et al., 2001; Larson et al., 2006<br />
Range<br />
6-81%<br />
724 heifers<br />
5 locations<br />
14.7 months<br />
1 3<br />
5 7<br />
Effectiveness of the CIDR to induce estrus in<br />
lactating anestrous (non-cycling) cows<br />
70<br />
Percent exhibiting estrus<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
FL IL NEB MU MT OK ALL<br />
Lucy et al., 2001<br />
Pregnant (%)<br />
Fig 3. Synchronization responses with 7 day<br />
CIDR in <strong>Bos</strong> <strong>taurus</strong> and <strong>Bos</strong> <strong>indicus</strong> type cows<br />
100<br />
80<br />
60<br />
40<br />
20<br />
0<br />
58<br />
Select Synch<br />
+ CIDR + TAI<br />
<strong>Bos</strong> <strong>taurus</strong> 1<br />
49<br />
54<br />
n=498 n=332 n=539<br />
33<br />
n=891<br />
Select Synch +<br />
CIDR + TAI<br />
<strong>Bos</strong> <strong>indicus</strong> 2 Co-Synch +<br />
CIDR<br />
<strong>Bos</strong> <strong>taurus</strong> 1 Co-Synch +<br />
CIDR<br />
<strong>Bos</strong> <strong>indicus</strong> 3 !<br />
(Larsen et al., 2006 1 ; Saldarriaga et al., 2004 3 ; Yelich, 2000 3 , Esterman, 2011 2 )<br />
!"#$%&'(&)*+,"-./*0&*1&23&,-%40"056&-"7%/&#%78%%0&79%&:;<br />
;;Q&<br />
M>(SN&<br />
O0&P<TQ&<br />
R&I(I>&<br />
R&I(I>&<br />
6
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