EVALUATION OF EXOTIC BIVOLTINE GENETIC RESOURCES TO IDENTIFY PROMISING BIVOLTINE BREEDS FOR TEMPERATE REGIONS OF INDIA

M. MAHESWARI¹*, G. LOKESH², R. SUR CHAUDHURI³, SHIVKUMAR⁴, N. BHARATH KUMAR⁵, BABULAL⁶, C.M. KISHOR KUMAR⁷, B.T. SREENIVASA^8
1Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
²Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
³Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
⁴Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
⁵Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
⁶Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
⁷Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
⁸Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
* Corresponding Author : appuchinna15@gmail.com

Received : 01-04-2021     Accepted : 26-04-2021     Published : 30-04-2021
Volume : 13     Issue : 4       Pages : 821 - 823
Genetics 13.4 (2021):821-823

Keywords : Silkworm Germplasm, Exotic bivoltine accessions
Academic Editor : Dmello Basil Rudolph, B. S. Khadda, Dr Vipul N Kapadia
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Central Silk Board, Ministry of Textiles, Govt.of India for funding the project work. Authors are also thankful to Central Sericultural Germplasm Resources Centre, Central Silk Board, Hosur, 635 109, Tamil Nadu, India
Author Contribution : All authors have equally contributed

Under conservation and maintenance of silkworm genetic resources, a total of 475 (83 multivoltine, 369 bivoltine and 23 mutants) silkworm germplasm accessions were conserved in disease free conditions after thorough characterization and evaluation. Based on the performance, 20 exotic bivoltine accessions were shortlisted from the available germplasm resources which include top ten each of oval and dumb-bell accessions. These accessions were evaluated at temperate zone (Pampore, Jammu & Kashmir) during autumn and spring season for two years and data on rearing and reeling performance was collected. The analyzed data revealed that the exotic bivoltine accessions that spun oval cocoons viz. BBE-0201 and BBE-0329 and that spun dumbbell cocoons, viz., BBE-0197, BBE-0267 and BBE-0268 were better combiners with CSR2 and CSR4 respectively and exhibited greater efficacy during two different seasons (autumn season & spring season) in temperate region. These breeds can be utilized for single and double hybrid preparation for commercial utilization at field level in temperate regions of India

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