Abstract
Thirty nine accessions of Som, Persea bombycina Kost. were evaluated through rearing of muga silkworm, Anthereae assamensis Helfer during two commercial seasons viz. Kotia (October-November) and Jethua (May-June) to identify the superior accessions for more silk productivity. The rearing performances on each of the som accessions were evaluated on four characters viz. effective rate of rearing (ERR), Cocoon weight, shell weight, and shell ratio percentage (SR%) by the multiple trait evaluation index (EI) method. During Kotia crop, fourteen accessions showed average EI values of >50 (ranging from 50.22 to 62.37) and during Jethua crop, twenty accessions manifested average EI values of >50 (ranging from 50.12 to 67.55). It was found that ten accessions viz. PT-11, PT-16, PT-17, PT-27, PT-28, PT-29, PT-37, PT-38, PT-34 and PT-04 exhibited average EI values of >50 in both the rearing seasons thereby indicating the superiority of these accessions to the other accessions.
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