EVALUATION OF EXOTIC BIVOLTINE BREEDS TO IDENTIFY PROMISING PARENTAL GENETIC RESOURCES FOR TROPICS

M. MAHESWARI¹*, G. LOKESH², R.S. CHAUDHURI³, J. KHATOON⁴, D.S. SOMAPRAKASH⁵, M. MUTHULAKSHMI⁶, C.M. KISHORE KUMAR⁷, G.C. DAS⁸, A.K. VERMA⁹, R.K. MISHRA^10
1Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
²Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
³Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
⁴Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
⁵Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
⁶Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
⁷Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
⁸Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
⁹Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
¹⁰Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, Tamil Nadu, India
* Corresponding Author : mahi_munusamy@rediffmail.com

Received : 01-01-2020     Accepted : 27-01-2020     Published : 30-01-2020
Volume : 12     Issue : 1       Pages : 693 - 697
Genetics 12.1 (2020):693-697

Keywords : Silkworm germplasm, Exotic bivoltine accessions, Evaluation index, Hotspots
Academic Editor : Rajpal Diwakar
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635109, India
Author Contribution : All authors equally contributed

CSGRC plays a pivotal role in the inter-institutional collaboration for screening /testing/evaluation of sericultural germplasm through traditional as well as molecular tools. Presently, CSGRC is maintaining 369 silkworm genetic resources in the gene bank comprising 209 indigenous and 160 exotic accessions. Based on the rearing and reeling performance, 20 exotic bivoltine accessions were shortlisted from 169 accessions and utilised for hybrid preparation by crossing with the popular breed CSR2/CSR4. The hybrids of 20 exotic bivoltine accessions were tested by conducting four trials in favourable seasons at three tropical test centres along with control to assess the potentiality of the exotic bivoltine accessions as parents. The study indicated that the accessions viz. BBE-0197 and BBE-0267 performed as better combiners with CSR4 and revealed as promising exotic bivoltine accessions.

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