Abstract
Genetic variability and divergence among 9 natural populations of Mus terricolor from Terai and the Dooars regions of Darjeeling foothills, India were examined by electrophoretic analysis of 10 enzyme/protein loci. All populations were highly polymorphic in terms of percent polymorphism (P), effective number of alleles (Ae) and heterozygosity (H). P varied from 90 to 100%, while Ae was found to range from 1.8148 to 2.3720 in different populations. The mean Ho were 0.4144 and 0.4495 in the Dooars and Terai populations, respectively. Dooars populations were moderately differentiatiated (FST = 0.0914) with gene flow of 2.4865 while, a low level of genetic differentiation was found in Terai populations (FST = 0.0295) combined with high gene flow of 8.2197. UPGMA cluster analysis using Nei’s D-values revealed three clusters: cluster I and III comprising of Dooars populations and cluster II consists of Terai populations. Two populations, Rohimabad and Kumargram (cluster III) showing higher D value than the other Dooars populations appeared as outgroup. Garidhura population in Terai also showed somewhat unexpected D values which is not concordant with geographical distance. Inbreeding was not pronounced among local populations however, moderate level of differentition exists may be due to physical barrier and adaptation to variable habitat.
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