Reciprocal effect in hybrids between univoltine and multivoltine breeds of the silkworm, Bombyx mori L.

Abstract :

Reciprocal effects were studied in F1 hybrids involving three indigenous multivoltine silkworm breeds and one tropical univoltine race. Superiority of straight crosses between univoltine and multivoltine breeds has been shown for cocoon yield /10,000 larvae by number and weight, cocoon weight, cocoon shell weight and cocoon yield/100 dfls whereas, reciprocal crosses of univoltine ´ multivoltine were found superior only for fecundity and cocoon shell percentage. Among the hybrids, Barpat ´ PM was adjudicated as the best hybrid exhibiting maximum average evaluation index values of 60.30 and >50 index values for all the economic characters except ERR by number and ranked first followed by Nistari ´ Barpat (50.76) and Sarupat ´ Barpat (49.44) which were ranked second and third exhibiting >50 evaluation index values for six and five characters respectively

Keyword :

Bombyx mori L., multivoltine and univoltine breeds, reciprocal effect, straight and reciprocal hybrids

Author(s) : Singh, R., Reddy, G. V., Kumari, K. M. V., Angadi, B. S., Sivaprasad, V.
Downloads : 1659
Published Issue : 2014 Vol. 9 Number 2

2014 Vol. 9 Number 2