International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Preliminary Studies on the Role of ${\alpha}-Esterase$ Isozymes in Quantitative Traits of Two Multivoltine Silkworm (Bombyx mori L.) Races and their $F_1$ Hybrid

  • Kumaresan P. (Central Sericultural Germplasm Resources Centre) ;
  • Somasundaram P. (Central Sericultural Germplasm Resources Centre) ;
  • Kumar K. Ashok (Central Sericultural Germplasm Resources Centre) ;
  • Urs S. Raje (Central Sericultural Germplasm Resources Centre)
  • Published : 2006.12.31
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Abstract

Heterosis was studied involving two multivoltine silkworm breeds viz, APM1 and SLKSPM through rearing and isozyme analysis. A positive significant heterotic effect was observed in fecundity, hatching % and survivability. The heterobeltiosis was observed only in fecundity and hatching %. Isozyme analysis of ${\alpha}-esterase$ showed variation in loci and allelic expression. The allele with heterozygosity $(Est-2^{12})$ was observed at the Est-2 locus in $F_1$ progeny. Est-3 was observed in $F_1$ progeny, whereas it was completely absent in both parental lines. The present study suggests that the markers ($Est-2^{12}$ and Est-3) targeted for introgression may be useful for the improvement of fecundity and survivability as the phenomenon of heterosis was observed only in $F_1$ progeny.

Keywords

References

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