Comparative evaluation of litter traits in desi, large white Yorkshire and their crossbred pigs
By: Gopinathan A.
Contributor(s): Usha A P (Guide).
Material type:
BookPublisher: Mannuthy Department of Animal Breeding and Genetics, College of Veterinary and Animal Sciences 2001DDC classification: 636.082 Online resources: Click here to access online Dissertation note: MVSc Abstract: The present study was undertaken to compare and
evaluate litter traits in Large White Yorkshire, Desi and
their Crossbred pigs and to decide a breeding strategy. The data on
20-25 farrowings were collected from Centre for Pig Production
and Research, Mannuthy for Large White Yorkshire, Desi and
Crossbred pigs. A random sample of eight animals from each
genetic group was selected and maintained from weaning to eight
month of age to study the growth, feed conversion efficiency and-
carcass characteristics.
The average birth weight and weaning weight, litter
size at birth and weaning, litter weight at birth and weaning,
pre-weaning mortality for each genetic group were calculated.
Large White Yorkshire was found to be superior for all traits
followed by Crossbred and Desi pigs. Crossbred pigs had lowest
pre-weaning mortality while Desi pigs had highest litter size at
birth. Analysis of variance showed that the effect of genetic group
was found to be highly significant for all litter traits except litter
size at birth and weaning.
The data were analysed using least squares analysis of
variance to study the effect of different factors on birth weight and
weaning weight in all three genetic groups. Least squares analysis
of variance for birth weight revealed that the effect of sire and
litter size at birth was highly significant in all three genetic
groups. Sex had significant effect only in crossbreds. For weaning
weight, the effect of sire and litter size at birth were found to be
highly significant while sex did not show a significant effect on
weaning weight in all three genetic groups.
The effect of genetic group was found to be highly
significant for third, fifth and eighth month body weight. But there
was no significant effect noticed between Large White Yorkshire
and Crossbred pigs during third month. The average daily gain and
feed conversion efficiency was highest for Large White Yorkshire
followed by Crossbred and Desi pigs from weaning to eight months
of age.
In carcass traits like back fat thickness, loin eye area,
dressing percentage and carcass length, Large White Yorkshire
averaged better than Desi and Crossbred pigs. The effect of genetic
group was found to be highly significant for all carcass traits. The
cost of production per kg of live body weight was calculated in
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 636.082 GOP/CO (Browse shelf) | Available | 171714 |
MVSc
The present study was undertaken to compare and
evaluate litter traits in Large White Yorkshire, Desi and
their Crossbred pigs and to decide a breeding strategy. The data on
20-25 farrowings were collected from Centre for Pig Production
and Research, Mannuthy for Large White Yorkshire, Desi and
Crossbred pigs. A random sample of eight animals from each
genetic group was selected and maintained from weaning to eight
month of age to study the growth, feed conversion efficiency and-
carcass characteristics.
The average birth weight and weaning weight, litter
size at birth and weaning, litter weight at birth and weaning,
pre-weaning mortality for each genetic group were calculated.
Large White Yorkshire was found to be superior for all traits
followed by Crossbred and Desi pigs. Crossbred pigs had lowest
pre-weaning mortality while Desi pigs had highest litter size at
birth. Analysis of variance showed that the effect of genetic group
was found to be highly significant for all litter traits except litter
size at birth and weaning.
The data were analysed using least squares analysis of
variance to study the effect of different factors on birth weight and
weaning weight in all three genetic groups. Least squares analysis
of variance for birth weight revealed that the effect of sire and
litter size at birth was highly significant in all three genetic
groups. Sex had significant effect only in crossbreds. For weaning
weight, the effect of sire and litter size at birth were found to be
highly significant while sex did not show a significant effect on
weaning weight in all three genetic groups.
The effect of genetic group was found to be highly
significant for third, fifth and eighth month body weight. But there
was no significant effect noticed between Large White Yorkshire
and Crossbred pigs during third month. The average daily gain and
feed conversion efficiency was highest for Large White Yorkshire
followed by Crossbred and Desi pigs from weaning to eight months
of age.
In carcass traits like back fat thickness, loin eye area,
dressing percentage and carcass length, Large White Yorkshire
averaged better than Desi and Crossbred pigs. The effect of genetic
group was found to be highly significant for all carcass traits. The
cost of production per kg of live body weight was calculated in
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