Studies on the relationship between economic traits and Biomolecules of Mulberry Silkworm - A review
1P.H. Thejaswini and 2*H.B. Mahesha
1Department of Biotechnology, Maharani’s Science College for Women, Mysore - 570005 {India} 2Department of Sericulture, Yuvaraja’s College, University of Mysore, Mysore - 570005 {India} *Corresponding Author E-mail:hbmahesh@ycm.uni-mysore.ac.in
ABSTRACT
Mulberry silkworm Bombyx mori L. is playing an important role in the economic life of man since time immemorial. Though the conventional breeding techniques yielded several improved silkworm breeds with high productivity, have to overcome some limitations like genetic background, climatic influence, time duration etc. Recent advances in genetics and molecular biologyi.e., molecular markers have offered a number of alternative strategies to overcome the above limitations. Therefore, identification of suitable markers holds the key to successful implementation of marker assisted selection. Conventional library literature survey and online research databases with following keywords viz., correlation studies between {biomolecules} haemolymph, midgut, fat body, proteins, amylase, esterase, succinate dehydrogenase and {commercial characters} fecundity, hatching per cent age, weight of fifth instar larva, larval duration, cocoon weight, shell weight, shell ratio, filament length, denier and renditta were used. Review of literature showed that some authors have studied the correlation between selected characters of silkworm with selected biomolecules in selected silkworm breeds of both tropical and temperate regions. However, the clear evidence showing clear-cut correlation between biomolecules with commercial characters has not reported. This review identifies the workdone so far and reveals the gaps between the correlation studies. This reminds us for a technique/s for marker assisted selection of parents and progenyin silkworm breedingprogrammers for improvedcommercial characters. Further, it may be applicable in other crops in general.