Journal of Entomology1812-56701812-5689Asian Network for Scientific Information10.3923/je.2010.160.1671 Hybrids of Indian Tropical Tasar Silkworm, Antheraea mylitta Drury]]>Manohar ReddyR. RaiSuresh SrivastavaA.K. KarP.K. SinhaM.K. PrasadB.C. 3201073Assorted F1 hybrids and reciprocals of divergent tasar ecoraces of Antheraea mylitta viz., Daba, Jata and Raily were evaluated for relative heterosis. The DabaxJata [R] (random female and male) and its reciprocal hybrids have recorded high positive heterosis for fecundity (+17.45 and +1.70%), egg fertility (+11.58 and +7.20%), shell weight (+34.76 and +27.44%), silk ratio (+30.49 and +24.15%) and silk yields (+94.33 and +82.51%), respectively. Dabax Jata [PxS] (high pupal female and high shell male) hybrid, although recorded positive heterosis for all traits, but was next to random parental hybrids. The DabaxJata [PxP] (high pupal female and high pupal male) combination and its reciprocal have shown positive heterosis only for fecundity (+22.13 and +35.89%), while DabaxJata [SxS] (high shell female and high shell male) hybrid and its reciprocal are positive in shell weight (+45.12 and +33.54%) and silk ratios (+26.95 and 27.95%). All hybrids of DabaxRaily including reciprocals have shown negative heterosis for fecundity and silk yields. However, DabaxRaily [R], [SxS], [PxS] hybrids and their reciprocals have shown uneven positive heterosis for egg fertility (+1.65 to +20.74%), shell weight (+7.56 to +56.98%) and silk ratios (+1.02 to +54%). In general, all reciprocal F1 hybrids of Daba, Jata and Raily ecoraces have shown lesser heterosis. The dissimilar performance of assorted F1 hybrids and reciprocals of Daba, Jata and Raily ecoraces reveal their varied potential on relative heterosis. However, the study infers commercial prospective and optimal seed cocoon expediency in Daba and Jata ecoraces as F1 hybrids [R] and reciprocals. While, the trait specific positive heterosis in high pupal and high shell hybrids (assorted F1 hybrids) have application in segregating lines with desired traits and aggregating them in to needy one(s).]]>Aruga, H.,1994pp: 99-111pp: 99-111Falconer, D.S.,1985Hansda, G., R. Manohar-Reddy, M.K. Sinha, N.G. Ojha and N.B.V. Prakash,2008Ex situ stabilization and utility prospects of Jata ecorace of tropical tasar silkworm Antheraea mylitta Drury.]]>17169172He, X.Z. and Q. Wang,2006Aphidius ervi (Hymenoptera: Aphidiidae).]]>36293298Kumar, N.S., H.K. Basavaraja, P.G. Joge, G.V. Kalpana and N. Malreddy,2008Bombyx mori L. under different environments of temperature.]]>10112Li, B., G.T. Howe and R. Wu,1998Populus tremuloides, P. tremula).]]>182936Moghaddam, S.H.H., N.E. Jomeh, S.Z. Mirhosseini and M.R. Gholamy,2005Bombyx mori L.]]>109599Moorthy, S.M., S.K. Das, N.B. Kar and S.R. Urs,2007Bombyx mori suitable for variable climatic conditions of tropics.]]>1499105Nagaraju, J., R. Urs and R.K. Datta,1996Bombyx mori L.) A review.]]>36120Naqvi, A.H., A.K. Srivastava, A.K. Sinha, S.R. Viswakarma and G.C. Roy,2004Antheraea mylitta D.]]>11495501Puttaraju, H.P. and K.L. Rajanna,1997Bombyx mori L. 1. Direcet response.]]>36121127Reddy, R.M., N. Suryanarayana and N.B.V. Prakash,2008Antheraea mylitta D (Lepidoptera: Saturniidae).]]>13235Reddy, R.M., N. Suryanarayana, N.G. Ojha, G. Hansda, S. Rai and N.B.V. Prakash,2009Antheraea mylitta Drury: A strategic approach.]]>186975Sengupta, A.K., A.A. Siddiqui, D.P. Dasmohapatra, A. Kumar and K. Sengupta,1987Antheraea mylitta D.]]>27519524Siddiqui, A.A.,1997Antheraea mylitta D.]]>375969Siddiqui, A.A. and A.K. Sengupta,1993Antheraea mylitta) in field.]]>323942Siddiqui, A.A., A.K. Sengupta, A.K. Sinha and K. Sengupta,1988Antheraea mylitta D.]]>28187192Singh, R., H.K. Chaturvedi and R.K. Datta,1994Bombyx mori in relation to female cocoon weight and repeated matings.]]>337071Singh, T., B. Saratchandra and G.N. Murthy,2002Bombyx mori L.]]>52332Sinha, A.K., A.K. Srivastava, B.R.P.D. Sinha and K. Thangavelu,2001Antheraea mylitta Drury.]]>10849852Suryanarayana, N., K. Sengupta and B.N. Bramhachari,1987Antheraea mylitta D.]]>27701709Verma, A.K., G.K. Chattopadhyay, M. Sengupta, S.K. Das and A.K. Sarkar,2005Bombyx mori L.]]>11119124Zhao, Y., K. Chen and S. He,200755761