BIOCHEMICAL POLYMORPHISM IN BROILER RABBITS
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Date
1990-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
COLLEGE OF VETERINARY AND ANIMAL SCIENCES Mannuthy - Trichur
Abstract
Blood samples collected from rabbits maintained in
the rabbit breeding farm of Kerala Agricultural University
formed the materials for this study. These blood samples
were typed employing horizontal polyacrylamide gel
electrophoresis to study the polymorphism of transferrin/
t
post transferrin and haemoglobin. A total of 152 rabbits
comprising of 50 Soviet Chinchilla; 52 Newzealand White
and 50 local rabbits were involved in the study. Genetic
inter relationship among growth traits and survivability
were studied.
In all the genetic groups; two transferrin variants;
A C
the faster Tf and slower Tf with two phenotypes TfAA
A C and TfAC were observed. The gene frequency of Tf and Tf
were 0.7500 and 0.2500 in Soviet Chinchilla; 0.8300 and
0.1700 in Newzealand White and 0.8100 and 0.1900 in local
A
rabbits. The frequency of Tf allele was higher in all
the populations. The phenotype TfCC was not observed in
any of the genetic groups.
Three post transferrin phenotypes Ptf FF; Ptf FS and
Ptf 33 were detected and found to be controlled by two
ii
co-dominant alleleS/ Ptf^ and Ptf^. The fast moving
F variant was designated as Ptf and the slow moving migrant
• S F was designated as Ptf . The gene frequency of Ptf was
0.7400, 0.8500 and 0.7600 in the three genetic groups and
that of Ptf^ was 0.2600, 0.1500 and 0.2400 in Soviet
V Chinchilla, Newzealand White and local rabbits
respectively. ,
Haemoglobin was found to be monomorphic in all the
three genetic groups studied.
The allelic frequencies of transferrin and post
transferrin were suggestive of Hardy Weinberg equilibrium
in the populations of three breeds. No significant
diversity was found to exist between genetic groups.
Analysis of .aegretation pattern observed in
pedigrees revealed the autosomal codominant mode of
inheritance for transferrin and post transferrin alleles.
The absence of TfCC phenotype in the whole population
of rabbits may be due to its unfavourable influence on
the viability.
Ill
significant association was observed between the TfAA
phenotype and body weight at the ages of 15 days/ 30 days#
45 days, 60 days, 75 days and 90 days of age in Soviet
Chinchilla and local rabbits. But no significant
association was observed between transferrin phenotype
and reproductive traits studied.
Average daily gain was found to have no significant
association with the protein types in any of the genetic
groups studied. Preweaning mortality was 38.46 percent
in TfAA X TfAA matings and 28.57 percent in TfAC x TfAC
matings.
Post transferrin phenotype was found to have no
significant association With any of the ecpnowic itraits
studied.
Among the three biochemicals of blood studied,
transferrin and post transferrin reflected a great scope
for genetic monitoring of populations of rabbits.