Abstract
The genetic diversity in the wild and semi-domestic populations of Daba ecorace of Antheraea mylitta was studied to ascertain the distribution of variability within and among populations of semi-domestic bivoltine (DB), trivoltine (DT) and nature grown wild populations (DN) with inter-simple sequence repeat (ISSR) markers. A total of 138 markers were produced among 56 individuals of the three populations, of which 98% were polymorphic. For the individual populations, the percentage polymorphism was 58.69, 52.9 and 77.54 for DB, DT and DN, respectively. Average number of observed (1.791 ± 0.408) and effective alleles (1.389 ± 0.348) was also high in the wild populations in comparison to the bivoltine and trivoltine semi-domestic populations. Genetic diversity (Ht) in DB, DT and DN was 0.180 ± 0.033, 0.153 ± 0.032 and 0.235 ± 0.033, respectively and within-population genetic diversity (Hs) ranged from 0.166 to 0.259 with a mean of 0.189. Mean gene differentiation (GST) was found to be 0.25. Shanon’s diversity index was 0.278, 0.237 and 0.361 for DB, DT and DN and overall it was 0.391. Gene flow (Nm) among the populations was 1.509. The dendrogram produced by UPGMA with Dice’s genetic distance matrices resulted in the formation of three major clusters separating the three populations. Considerable intra- and inter-population variability is found in all three populations. The population structure analysis further suggests that the semi-domestic populations of Daba ecorace are at the threshold of differentiating themselves. The high genetic variability present within wild Daba population of A. mylitta is of much importance for conservation as well as utilization in systematic breeding program.
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Kar, P., Vijayan, K., Mohandas, T. et al. Genetic Variability and Genetic Structure of Wild and Semi-domestic Populations of Tasar Silkworm (Antheraea mylitta ) Ecorace Daba as Revealed through ISSR Markers. Genetica 125, 173–183 (2005). https://doi.org/10.1007/s10709-005-7002-z
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DOI: https://doi.org/10.1007/s10709-005-7002-z