Bos taurus vs. Bos indicus - Beef Improvement Federation

Select Synch + CIDR and TAI in suckled
Bos indicus type cows
Item Year 1 Year 2 Year 3 Combined
Estrous response,% 47.6 (63) 45.2 (62) 52.9 (157) 48.5 (282)
Conception rate, % 68.8 (30) 60.7 (28) 77.1 (83) 68.8 (141)
Timed AI
pregnancy rate, % 30.3 (33) 58.8 (34) 46.0 (74) 44.8 (141)
Synchronized
pregnancy rate, % 50.8 (63) 59.7 (62) 62.4 (157) 57.6 (282)
Esterman et al., 2008: (Mean: BCS 5.0, DPP 75 days)
Percentage Brahman (n)
Variable AN 1/4 3/8 1/2 3/4 BR
Estrous
Response, %
Conception
Rate, %
Timed-AI
Pregnancy
Rate, %
AI Pregnancy
Rate, %
Select Synch + CIDR and TAI in Suckled
Angus, Brahman, and respective crosses
62.9 a
(70)
68.2
(44)
38.5
(26)
57.1
(70)
44.3 b
(70)
54.8
(31)
48.7
(39)
51.4
(70)
a,b (P < 0.05); J.V. Yelich, unpublished data
68.6 a
(35)
50.0
(24)
36.4
(11)
45.7
(35)
45.4 b
(97)
72.7
(44)
45.3
(53)
57.7
(97)
37.5 b
(32)
50.0
(12)
35.0
(20)
40.6
(32)
45.2 b
(31)
57.1
(14)
23.5
(17)
38.7
(31)
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AI pregnancy rates in Bos indicus type cows
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