Sheelavathi A.V., Ravi Kumara R.* and Basavaiah
Department of Sericulture Science, Manasagangotri, University of Mysore, Mysuru -570 006
Received-03.09.2022, Revised-15.09.2022, Accepted-28.09.2022
Abstract: Mulberry (Morus spp.:Moraceae) breeding was programmed in a systematic way in India and progress was made in different aspects considering the overall needs of the sericulture industry. Mulberry varieties with higher levels of succulence and nutrition are suitable for healthy and robust chawki worms (young-age silkworms). The mulberry variety S-36 was recommended for chawki rearing. However, Victory-1 is the most exploited mulberry variety for chawki gardens. Further, a new mulberry variety, G-2 (Genotype-2), is being popularized currently for chawki rearing centers. The present study was conducted on the mulberry cultivar G-2 and its parents (Morus multicaulis Perr and S-34) for comparative studies with respect to cytological, morphological, and anatomical features. The results revealed that Morus multicaulis, S-34, and G-2 varieties are diploid in nature, with the chromosome number of 2n=28. Normal meiosis was observed in the male parent (S-34) of the G-2 variety. The morphometric traits of the hybrid variety, G-2, are exhibited in an intermediate nature between the two parents. The new combinations in the important yield-contributing parameters clearly indicated the improved vigor of this hybrid.
Keywords: Chawki worms, G-2, Morus multicaulis Perr, S-34
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