Estimates Of Genetic Traits In Silkworm (Bombyx Mori L.)  Under Temperate Conditions Of Kashmir

Masarat Bashir; Afifa S Kamili; M Ashraf Bhat; S A  Mir

doi:10.48165/

Authors

Masarat Bashir Temperate Sericulture Research Institute, S.K. University of Agricultural Sciences & Technology of Kashmir (SKUAST-K), Mirgund, Baramulla, Jammu & Kashmir (India)
Afifa S Kamili Temperate Sericulture Research Institute, S.K. University of Agricultural Sciences & Technology of Kashmir (SKUAST-K), Mirgund, Baramulla, Jammu & Kashmir (India)
M Ashraf Bhat Division of Genetics & Plant Breeding, SKUAST-Kashmir, Shalimar, Srinagar - 190 025, Jammu & Kashmir (India)
S A Mir Division of Agri-Statistics, SKUAST-Kashmir, Shalimar, Srinagar - 190 025, Jammu & Kashmir (India)

DOI:

https://doi.org/10.48165/

Keywords:

Bombyx mori, correlation, genetic advance, heritability, path coefficient analysis

Abstract

The genetic parameters, trait association and path coefficient analysis between silkgland weight and its attributes of 10 silkworm genotypes were studied during spring and summer seasons of 2010-11 at TSRI, SKUAST-Kashmir (Mirgund). The genotypes exhibited wide range variability for all the traits studied. High heritabilityaccompanied by moderate to high genotypic coefficient of variation and genetic gain were observed for filament length, shell ratio, single shell weight and filament size. Correlation studies indicated that during spring season, silkgland weight showed positive and significant correlation with shell ratio, while it showed significantly negative association with silkgland somatic index, while during summer season it showed significant positive association with all the traits except silk conversion index. The silkgland attributes exhibited varied magnitude of direct effects on silkgland weight during both spring and summer season. During summer season single shell weight showed the highest direct positive effect on silkgland weight which was followed by the filament length, while during spring season, highest positive direct effect on silkgland weight was exhibited by cocoon shell percentage(3.574) and single shell weight (3.346).

Downloads

Download data is not yet available.

References

Ahsan, M.K., and Rahman, S.M. 2008. Genetic variability and correlation analysis in hybrids of mulberry silkworm, Bombyx mori L. for egg characters. University Journal of Zoology Rajshahi University, 27: 13-16.

Akanda, M.A.L., Alam, M.S. and Uddin, M.M. 1998. Genetic variability, correlation and path analysis in composite maize. Bangladesh Journal of Agricultural Research, 23: 107-113. Al-Jibouri, H.A., Miller, R.A. and Robinson, H.F. 1958. Genetic environmental variances and covariances in an upland cotton cross interspecific origin. Agronomy Journal, 50: 633-636. Burton, G.W. 1952. Quantitative inheritance in grasses. Proceeding of Sixth International Grassland Congress, 1: 277-288.

Darmand, S., Lavvaf, A., Seidavi, A. R., Eila, N., Nematollahian S. and Farahvash, T. 2011. Estimation of genetic parameters in three commercial silk-worm lines of Iran. African Journal of Biotechnology, 10(61): 13324-13330.

Dewey, D.R. and Lu, H.R. 1959. A correlation and path coefficient analysis of components of crested wheat grass seed production. Agronomy Journal, 51: 515-518.

Hanson, C.H., Robinson, H.F. and Comstock, R.E. 1956. The biometrical studies on yield in segregating population of korian lespedeza. Agronomy Journal, 48: 268-272. Jaiswal, K. and Goel, R. 2006. Studies on cocoon shapes in most popular mulberry silkworm race of Uttaranchal different seasons of Uttar Pradesh. pp. 57. In: National Conference on New Strategies in Research and Development of Sericulture – Indian Perspective. 9-10th March, 2006. Department of Sericulture, Jnanabharathi, Bangalore University, Bangalore, Karnataka India.

Johnson, H.W., Robinson, H.F. and Comstock, R.E. 1955. Estimation of genetic and environmental variability in soybean. Agronomy Journal, 47: 314-318.

Krishnaswami, S. 1978. New technology of silkworm rearing. Bulletin of Central Sericultural Research and Training Institute, Mysore. 2: 1-23.

Kumar, K.C.M. and Basavaraja, H.K. 2011. Synthesis of bivoltine silkworm breeds of Bombyx mori L. with longer and thin cocoon filament. pp. 66-67. In: Indian Abstracts of Golden Jubilee National Conference on Sericulture Innovations - Before and Beyond. 28-29th January 2011, CSRTI, Mysore, Karnataka, India.

Kumar, S. N., Basavaraja, H.K., Joge, P.G., Mal Reddy, N., Kalpana G.V. and Dandin, S.B. 2006. Development of a new robust bivoltine hybrid (CSR46 x CSR47) of Bombyx mori L. for the tropics. Indian Journal of Sericulture, 45: 21-29.

Kumar, T., Bhattacharya, S., Morthy, M.S. and Kunda, K. 2012. Breeding and isozyme variability of a superior multivoltine strain of Bombyx mori L. Iranain Journal of Entomology, 2: 1-6. Kumaresan, P., Koundinya, P.R., Hiremath, S.A. and Sinha, R.K. 2007. An analysis of genetic variation and divergence on silk fibre characteristics of multivoltine silkworm (Bombyx mori L.) genotypes. International Journal of Industrial Entomology, 14: 23-32.

Mandal, K., Moorthy, S.M., Das, N.K., Das, S.K., Bajpai, A.K. and Sahu C. 2009. An analysis of genetic diversity in bivoltine silkworm, Bombyx mori L. pp.150. In: Indian National Conference on Vanya Silk. 2-3rd Feb., 2009, CMERTI, Jorhat, Assam, India.

Mohan, B., Balachandran, N., Muthulakshmi, M., Hiremath, S.A., Srinivasa Babu, G.K.S. and Kamble, C.K. 2009. Cocoon size variables vis-a-vis reeling traits of silkworm (Bombyx mori L.) germplasm. Madras Agricultural Journal, 96: 411-415.

Moorthy, S.M., Das, S.K., Rao, P.R.T., Debnath, S and Raje Urs, S. 2006. Genetic variability and selection index of some quantitative traits of bivoltine Silkworm, Bombyx mori L. Indian Journal of Genetics and Plant Breeding, 66: 82-84.

Masarat Bashir et al.

Moorthy, S.M., Mandal, K., Das, N.K., Kar, N.B. and, Das, S.K., 2010. Genotypic variability and genotype × environment interactions in bivoltine silkworm genotypes of Bombyx mori. pp.10. In: National Symposium on Deccan Biodiversity Co-existance of Funal Species in Changing Landscapes. 2-3rd Dec., 2010, Osmania University, Hyderabad, Andhra Pradesh, India.

Nagalakshmamma, K. and Naga Jyothi, P. 2010. Studies on commercial exploitation of selected multivoltine races of the silkworm Bombyx mori L. in different seasons of Rayalaseema region (a. p.) in india. The Bioscan, 5: 31-34.

Naseema, B.A., Basavaraja, H.K., Palit, A.K. and Ramaswmy, G.N. 2007. Seasonal variation in cocoon filament size deviation in the bivoltine silkworm, Bombyx mori L. Indian Journal of Sericulture, 46: 153-162.

Pal, N.B., Moorthy, S.M., Khan, M.Z, Das, N.K, Mandal, K. 2011. Analysis of genetic diversity in some multivoltine silkworm genotypes of Bombyx mori L. pp.68. In: Indian Golden Jubilee National Conference on Sericulture Innovations: Before and Beyond. 28-29th January, 2011. CSRTI, Mysore, Karnataka, India.

Panse, V.G. 1957. Genetics of quantitative characters in relation to plant breeding. Indian Journal of Genetics and Plant Breeding, 17: 318-328.

Rajesh, K. and Elangovan, K. 2010. Rearing performance of Eri silkworm, Philosamia ricini in monsoon season of Uttar Pradesh. Asian Journal of Experimental Biological Sciences, 1: 303-310.

Rama Mohana Rao, P., Premalatha, V., Joge, P.G., Nirmal Kumar, S. and Kamble, C.K. 2008. Impact of productive female parent in improving silk productivity in cross-breeds of the silkworm Bombyx mori L. pp. 91. In: National Seminar on Scenario of Seri-biotechnological Research in India. 28-30th August 2008. Department of Sericulture, Sri Padmavati Mahila Visvavidyalayam, Tirupati, Andhra Pradesh, India.

Reza, N.H., Alireza, S. and Shahabodin, G. 2014. A review on correlation, heritability and selection in silkworm breeding. Journal of Applied Animal Research,2: 1-10.

Shao, Z. and Vollrath, F. 2002. Surprising strength of silkworm silk. Nature, 418: 741-742. Shabdini, A., Seidavi, A.R., Gharahveysi, S. and Mirhosseni, S.Z. 2011. Genetic trend, phenotype trend, correlation, heritability and breeding values of three oval cocoon silkworm pure lines under selection pressure using Wombat software. Journal of Food, Agriculture and Environment, 9: 609-617.

Singh, R.K. 1972. Selection index - yes or no? Vistas Plant Sciences, 2: 111-140. Singh, T. and Madan, M. 2011.Critical analysis of correlation and heritability phenomenon in silkworm, Bombyx mori L. Advances in Bioscience and Biotechnology, 2: 347-353. Wright, S. 1921. Correlation and causation. Agricultural Research, 20: 557-558.