GENETIC VARIABILITY AND BOTTLENECK ANALYSES OF KANNI ADU GOAT POPULATION USING MICROSATELLITE MARKERS
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Date
2015-10
Journal Title
Journal ISSN
Volume Title
Publisher
Indian Society for Sheep and Goat Production and Utilization
Abstract
Microsatellite data on 25 loci were generated and utilized to evaluate the genetic architecture
and mutation drift equilibrium of Kanni Adu goats of southern Tamil Nadu. The genetic diversity
analysis of Kanni Adu goats displayed higher level of within breed variability in terms of mean
number of alleles per locus (11.24±0.87) and heterozygosity values (H = 0.677±0.041, H =
0.857±0.016). Within population inbreeding estimate (F =0.215±0.040) showed moderate level of
inbreeding, which warrant adoption of appropriate breeding strategies under field conditions. The
polymorphism information content (PIC) value ranged from 0.531 to 0.915 suggested higher
polymorphism in this breed. In general, the sign, standardized difference and Wilcoxon rank tests
indicated heterozygosity excess in Kanni Adu goat population in infinite alleles and two-phase
model and non-significant in stepwise mutation model. Hence, the mode-shift indicator test was
utilized and it indicated the absence of genetic bottleneck in the recent past in Kanni Adu goats. It
suggests that any unique alleles present in this breed may not have been lost. The study indicated
that Kanni Adu goats exhibited substantial amount of genetic variation as reflected from the
heterozygosity and number of alleles per locus.
Description
TNV_IJSR_2015_21(2)216-220
Keywords
Veterinary Science, Small Ruminants