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Microsatellite based genetic diversity study in indigenous chicken
ecotypes of Karnataka
Rudresh, H. N. N. Murthy, M. R. Jayashankar, C. S. Nagaraj, A. M.
Kotresh and S. M. Byregowda
Veterinary World, 8(8): 970-976
B. H. Rudresh:
Department of Animal Genetics and Breeding, Veterinary College,
Karnataka Veterinary, Animal and Fisheries Sciences University,
Shimoga, Karnataka, India; email@example.com
H. N. N. Murthy:
Department of Livestock Production and Management, Veterinary
College, Karnataka Veterinary, Animal and Fisheries Sciences
University, Bangalore, Karnataka, India;
M. R. Jayashankar:
Department of Animal Genetics and Breeding, Veterinary College,
Karnataka Veterinary, Animal and Fisheries sciences University,
Bangalore, Karnataka, India;
C. S. Nagaraj:
India Coordinated Research Project on Poultry Meat, Karnataka
Veterinary, Animal and Fisheries Sciences University, Veterinary
College, Bangalore, Karnataka, India;
A. M. Kotresh:
Department of Veterinary Physiology and Biochemistry, Veterinary
College, Karnataka Veterinary, Animal and Fisheries sciences
University, Shimoga, Karnataka, India;
S. M. Byregowda: Institute of Animal
Health & Veterinary Biologicals, Bangalore, Karnataka Veterinary,
Animal and Fisheries Sciences University, Karnataka, India;
12-02-2015, Revised: 30-06-2015, Accepted: 08-07-2015, Published
Rudresh, e-mail: firstname.lastname@example.org
Rudresh BH, Murthy HNN, Jayashankar MR, Nagaraj CS, Kotresh AM,
Byregowda SM (2015) Microsatellite based genetic diversity study
in indigenous chicken ecotypes of Karnataka, Veterinary World 8(8):
Aim: The current study was
the first of its kind taken upon indigenous ecotypes of the
Karnataka in order to unravel the diversity details at 20 chicken
Materials and Methods: 210 indigenous chicken belonging to six
districts of Bangalore and Mysore division formed the target
sample for the present study. The genomic deoxyribonucleic acid
was isolated by phenol chloroform isoamyl alcohol method. A panel
of 20 microsatellite regions, including 14 recommended by FAO and
six identified from published scientific literature became the
targeted chicken genomic region. 27-33 samples were successfully
genotyped in each of the six ecotypes through simplex or multiplex
polymerase chain reactions, polyacrylamide gel electrophoresis and
silver staining for the selected microsatellite panel.
Results: The chickens of Ramanagara and Chamrajnagara were
most distant with a Nei’s genetic distance value of 0.22. The
chickens of Bangalore rural and Mysore were least distant with a
value of 0.056. The Ramanagara and Chamrajnagara pair had Nei’s
genetic identity value of 0.802, which is least among all pairs of
ecotypes. There were five main nodes from which the six ecotypes
evolved on the basis 20 microsatellite markers used in this study.
This study indicates that the four ecotypes Ramnagara, Bangalore
Rural, Chickaballapura and Mysore are genetically identical due to
their common ancestral evolution while, Mandya and Chamrajnagara
ecotypes formed a relatively different cluster due to a separate
common ancestral chicken population and less number of generations
since drifting from bifurcation node.
Conclusion: Twenty microsatellite markers based genetic
diversity study on six indigenous ecotypes indicated lower genetic
distances as well as lower FST values compared to the
distinguished breeds reported. There were two main clusters, which
differentiated into six ecotypes. They may differentiate into more
distinct varieties if bred in isolation for a longer number of
Keywords: animal genetic resources, ecotypes,
microsatellites, polyacrylamide gel.
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