Assessment of demographic bottleneck in Indian horse and endangered pony breeds
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Bottleneck study of any continuously decreasing population is important and crucial issue in its conservation strategies including the analysis of simulated and real populations (Williamson-Natesan 2005; Busch et al. 2007). A bottleneck in a population can increase the rate of inbreeding, loss of genetic variation, fixation of deleterious alleles, thereby reducing evolutionary potential of animals to adapt to new selective pressures, such as climatic change or shift in available resources and increasing the probability of population extinction (Frankham 1995). The genetic changes caused by a bottleneck in a population’s effective size can lower the possibility of population’s persistence (Vrijenhoek 1994; Newman and Pilson 1997). Various endangered or threatened populations have been reported to have low levels of genetic variations (Vrijenhoek 1994; Gibbs et al. 1998). However, all the populations that have been reduced in size did not show quantifiable lower levels of...
Keywordsbottleneck Indian equine breeds mutation-drift equilibrium mode shift indicator.
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