Genetic variability, heritability and correlation analysis for some characters in hybrids of the mulberry silkworm, <i>Bombyx mori</i> L.

Authors

  • Md Kamrul Ahsan Department of Zoology, University of Rajshahi, Rajshahi
  • Sowdagar Mahfuzar Rahman Department of Zoology, University of Rajshahi, Rajshahi
  • Md Tajimul Haque Former Senior Scientific Officer, Bangladesh Sericulture Research and Training Institute, Rajshahi

DOI:

https://doi.org/10.3329/jles.v5i0.7349

Keywords:

Genetic variability, heritability, correlation, economic characters, B. mori

Abstract

Genetic variability, heritability and correlation analysis for some important economic characters in 35 hybrids of the silkworm, Bombyx mori L. have been investigated. Higher heritability values were recorded for effective rate of rearing by number (ERRn), followed by estimated cocoon yield per 100 dfls (ECY), weight of mature larvae (WML), filament length (FL) and effective rate rearing by weight (ERRw). Furthermore, characters such as FL, ERRn, ERRw and ECY showed higher genetic advance coupled with higher heritability values, indicating the importance of additive gene effect of these characters. The genotypic correlations were higher than the phenotypic correlations for all the characters under study. These low phenotypic correlations could be due to a modifying effect of environment of the association of characters at genotypic level. Most of the characters showed positive significant correlation to each other except ERRn and ERRw pair at phenotypic level. Therefore, proper attention should be given to these characters, especially WML, FL and ECY, in selection programmes for genetic gain in B. mori.

Key words: Genetic variability; heritability; correlation; economic characters; B. mori.

DOI: 10.3329/jles.v5i0.7349

J. Life Earth Sci., Vol. 5: 43-46, 2010  

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How to Cite

Ahsan, M. K., Rahman, S. M., & Haque, M. T. (2011). Genetic variability, heritability and correlation analysis for some characters in hybrids of the mulberry silkworm, <i>Bombyx mori</i> L. Journal of Life and Earth Science, 5, 43–46. https://doi.org/10.3329/jles.v5i0.7349

Issue

Vol. 5 (2010)

Section

Articles

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It is a condition of publication in the Journal that author(s) assigns copyright to the Faculty of Life and Earth Sciences, University of Rajshahi, whose permission must be obtained to reproduce there from. This would ensure efficient handling of reproduction of articles for third party requests and wide dissemination at large.