Madras Agricultural Journal
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EVALUATION OF HETEROSIS IN THE NEWLY EVOLVED BIVOLTINE HYBRIDS OF SILKWORM, Bombyx Mori

Abstract

The studies on the heterosis for the newly evolved bivoltine hybrids CSR2 x CSR4 and CSR2 x CSRS and their reciprocals have shown significant superiority over their parents. Helerosis was recorded highest in case of CSR2 x CSRS for fecundity (29.63%) as compared to other hybrids and also the heterobeltiosis (26.32%). Out of the hybrids studied as per evaluation index for all the traits, CSR2 & CSR5 registered maximum score ie., 58.59 than its reciprocal (44.14) and other hybrids CSR2 x CSR4 (53.61) and CSR4 x CSR2 (44.37), respectively. The hybrids CSR2 x CSR5 and CSR2 x CSR4 can be commercially exploited for obtaining maximum yield and better benefits at farmers level.

Keywords: Silkworm, Bombyx mori, bivoltine hybrids, heterosis

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