Agriculture Reference
In-Depth Information
Table 4.10
Continued
Breed
Body weight at
Mortality to
56 days
Sire
Dam
Birth
56 days
Market
Barki
Barki
2.1 (0)
6.2 (0)
12.6(0)
24(0)
Zaraibi
Zaraibi
2.1 (0)
6.3 (0)
10.9(0)
31(0)
Damascus
Damascus
3.1 (0)
9.1 (0)
17.5(0)
35(0)
Zaraibi
Barki
2.6 (24)
7.1 (15)
13.2 (5)
25 (4)
Damascus
Barki
2.6 (24)
7.8 (26)
15.6 (24)
33 (38)
Barki
Zaraibi
×
Barki
2.2 (
−
15)
7.5 (6)
14.7 (11)
34 (36)
Barki
Damascus
×
Barki
2.3 (
−
12)
7.5 (
−
4)
14.8 (
−
5)
21 (
−
36)
Breed
Litter weight
at weaning
Milk intake
per 1 kg gain
Total 16 - wk
milk yield
Sire
Dam
Barki
Barki
7.85 (0)
9.17 (0)
80.0 (0)
Zaraibi
Zaraibi
9.21 (0)
7.43 (0)
116.5 (0)
Damascus
Damascus
11.92 (0)
6.78 (0)
146.0 (0)
Zaraibi
Barki
10.15 (29)
7.70 ( − 16)
117.7 (47)
Damascus
Barki
10.41 (33)
7.70 ( − 16)
136.8 (71)
Barki
Zaraibi × Barki
7.94 ( − 22)
8.73 (13)
93.0 ( − 21)
Barki
Damascus × Barki
10.35 ( − 1)
8.20 (6)
123.0 (5)
Taneja, 1982; Singh et al., 2002; Singh et al., 2000; Ruvuna et al., 1988; Abdelsalam et al., 1994; Abdelsalam
et al., 2000; Shrestha and Fahmy, 2007.
1
Percent deviation from dam breed in parenthesis.
may be a consequence of marginal differences in the
mature weight of the parental breeds. In contrast kids
derived from bucks of the heavier Jamunapari breeds
and does of the dwarf Black Bengal breed were signifi -
cantly heavier than the contemporary purebred kids of
their female parent. Singh et al. (2002) reported that kids
derived from the larger Beetal breed exceeded the dwarf
Black Bengal and their reciprocal crosses in body weights
from birth to 12 months of age demonstrating 3-4% het-
erosis at 6- and 12-month body weights. However, they
found no difference between does of the Black Bengal
breeds and Beetal × Black Bengal crosses in age at fi rst
conception, while the latter showed a signifi cant increase
in age at fi rst kidding, service period, and kidding
interval.
In Kenya, Ruvuna et al. (1988) carried out a crossbreed-
ing study of several breeds and reported that the body
weight of kids from birth to 9 months of age were lowest
for East African, heaviest for Anglo - Nubian × Galla, and
intermediate for Galla, Toggenburg ×
Toggenburg × Galla, and Anglo - Nubian × East African
(Table 4.10). Kids derived from Toggenburg and Anglo-
Nubian buck and East African does exceed contemporary
kids derived from their female parental breed by 9-19%
for body weight from birth to 9 months of age. In another
study, Ruvuna et al. (1992) concluded Toggenburg and
Anglo-Nubian-sired kids had similar growth rate, slaugh-
ter weight and carcass composition. Galla dams produced
kids that were heavier and leaner than those from contem-
porary East African dams.
In Egypt, Abdelsalam et al. (1994) evaluated crosses
among bucks of the Zaraibi and Damascus breeds with
does of the Barki breed, and bucks of the Barki breed with
does of Zaraibi × Barki, and Damascus × Barki crosses
resulting in single- and backcrosses and contemporaries
derived from their purebred parents (Table 4.10). In the
Zaraibi × Barki cross heterosis of 12-24% was observed
for body weights from birth to market and 9% for mortality
to 90 days. Corresponding estimates of heterosis for the
Damascus × Barki cross varied from 0-4% for body
East
African,
