Abstract
The populations of Indian tropical Tasar silkworm, Antheraeamylitta Drury, the semi-wild, sericigenous, lepidopteran insect are distributed in eco pockets of various States. These ecoraces vary in geography, topography, ecology, food plant flora and frequency of life cycle in latitudinal and altitudinal gradients. They exhibit diversity in phenotypic, behavioural, physiogenetic and commercial characters. In the present study, the SSR amplification of 7 silkworm strains/ecoraces (16 individuals in each, with seven primers which generated polymorphism) yielded a total of 887 bands, out of which 420 were (47.3 %) polymorphic. Most of the bands were observed within the range 130 to 500 base pairs which is in accordance with the allelic size of the primers taken for studies. The subsequent analysis of its population structure using these alleles revealed the formation of population clusters. The study suggests that these markers could be effectively utilized for identifying the genetic variability among tasar ecoraces.
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