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by
F.D. Adeyinka |
Total Records (
5 ) for
F.D. Adeyinka |
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I.A. Adeyinka
,
O.O. Oni
,
B.I. Nwagu
and
F.D. Adeyinka
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The chicks used in this
experiment were obtained from a population of naked neck broiler chickens
that has been kept in NAPRI since 1998. Six Hundred chicks were obtained
from four hatches, one week apart. At hatch, pedigreed chicks were wing-banded
and housed on deep litter in an open house. Body weights were measured
biweekly up to 8 weeks of age. Other measurements taken include Neck
length, Back length, keel length and breast angle. The general least
square means were 37.22 ± 0.32, 210.46 ± 1.97, 744.33 ± 4.31, 1351.3
± 7.91 and 2428.1 ± 14.61g for wt at day old (WT0D), weight at 2 weeks
(WT14D), weight at 4 weeks (WT28D), weight at 6 weeks (WT42D) and weight
at 8 weeks (WT56D), respectively. While measurements taken included
Neck length, Back length, keel length and breast which were 7.31 ± 0.06,
15.99 ± 0.05, 5.63 ± 0.04, 10.44 ± 0.04cm respectively. The heritability estimates
ranged from low value of 3.013 ± 0.08 for keel length to 0.315 ± 0.22 for
WT0D. There were negative genetic correlations between WT0D and other
traits. This study showed that additive heritabilities are low for linear
body measurement and moderate for body weight for naked neck chickens
during rearing. |
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I.A. Adeyinka
,
O.O. Oni
,
B.I. Nwagu
and
F.D. Adeyinka
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The data used to calculate
the variance components of various production traits was obtained from
records of about 4000 hens daughters of about 180 cocks mated to about
1,500 dams and collected over 5 year period. Two strains of Rhode Island
Chickens were involved in this study. Within the red strain population
sire`s contribution to total variation in age at first egg did not exceed
8.6% across the year and 6.9% in the white strain. Except for body weight
at 40 weeks of the red strain where the contribution of the sire exceed
14%, the contribution of the sire to the total variation for all the
economic traits considered in this study were generally low for both
strain of the layer type chickens under consideration. Generally dam
component of variance were higher most of the time and in many traits
within the red strain population. |
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I.A. Adeyinka
,
C.L. Akanwa
,
G.T. Iyeghe-Erakpotobor
,
F.D. Adeyinka
and
M. Orunmuyi
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Data were collected on rabbits kept at the National Animal Production Research Institute Ahmadu Bello University, Zaria. The data were collected over 7 year period. The trait studied included average Litter Size at birth (LS), Average Birth Weight (ABWT), Average Weaning Weight (AWWT) and Gestation Length (GL). ABWT ranged from 46.67±4.05 to 52.84±2.94 in the late dry and early wet season, respectively. Average weaning weight and litter size were highest for rabbit born during the early rain period with a value of 12407plusmn;78 g and 5.18 kits, respectively. The highest average birth weight was recorded for kits born during the 3rd parity with a value of 51.4±3.65 g. The average weaning weight also follow a similar trend. Litter size was however highest for kits belonging to parity 4. AWWT and LS were significantly correlated with ABWT with a value of 0.22 and -0.43, respectively. The correlation coefficient of AWWT with LS and Parity were -0.14 and 0.32, respectively. All other correlations were small and non-significant. |
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M. Orunmuyi
,
I.A. Adeyinka
,
O.A. Ojo
and
F.D. Adeyinka
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One hundred and eleven litter records obtained from the mating of 8 bucks to 22 does of a non-descript population were used to provide estimates of heritability and genetic correlations for pre-weaning litter traits. Least square means and standard errors for fur score, litter size at birth, litter size at weaning and weaning weight were: 30.3±0.17, 3.72±0.12, 4.8±0.12, 3.6±0.14 and 480.70±22.43 g, respectively. The least square analysis of variance revealed that most of the productive traits studied exerted significant effect on weaning weight with the exception of litter size at birth and gestation length. Heritability estimates obtained for gestation length, fur score, litter size at birth, litter size at weaning and weaning weight were 0.60±0.39, 1.46±0.56, 1.09±0.51, 1.49±0.59 and 1.07±0.51, respectively. Genetic correlations were high and positive in most cases with the exception of correlations between gestation length and weaning weight and litter size at weaning and weaning weight which were negative. Phenotypic correlations were also high and positive in most cases except for gestation length and fur score and gestation length and weaning weight which were negative. |
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M. Orunmuyi
,
G.S. Bawa
,
F.D. Adeyinka
,
O.M. Daudu
and
I.A. Adeyinka
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A total of forty (40) growing
rabbits with an average initial weight of 921.5g were randomly allotted
to five dietary treatments containing 0, 10, 20, 30 and 40% palm kernel
cake as replacement for soyabean cake respectively. All diets were formulated
to be isonitrogenous (20% CP). The final live weights of the rabbits
were higher in the control diet compared to those on palm kernel cake
diets. With the exception of the rabbits placed on 40% level of palm
kernel cake daily feed intake, daily weight gain and feed efficiency
values compared favourably with those on control diet. Carcass weight
and weight of primal cuts expressed as percentage of carcass weight
did not show any significant difference between the treatment means.
Animals on 40% palm kernel cake diets had the highest (P< 0.05) cost
per kg gain compared to those on other dietary treatments. It was concluded
that palm kernel cake can be used up to 30% level in a maize – soyabean
meal based diet for grower rabbits without adverse effect on the performance
of the animals. |
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