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Heterosis observed in the hybrids between some improved multivoltines and bivoltines of Bombyx mori L.

Published online by Cambridge University Press:  19 September 2011

K. G. Banuprakash ,
R. Govindan  and
M. C. Devaiah
K. G. Banuprakash
Affiliation:
Department of Sericulture, University of Agricultural Sciences, GKVK, Bangalore-65, India
R. Govindan
Affiliation:
Department of Sericulture, University of Agricultural Sciences, GKVK, Bangalore-65, India
M. C. Devaiah
Affiliation:
Department of Sericulture, University of Agricultural Sciences, GKVK, Bangalore-65, India
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Abstract

Heterobeltiosis (relative to better parental variety) and standard heterosis (relative to standard variety) for 10 larval and cocoon quantitative traits among the hybrids between five multivotine and three bivoltine strains of silkworm, Bombyx mori L., were estimated. The results indicated that the hybrids between multivoltine females and bivoltine males gave higher heterosis than their reciprocals. Variance due to general and specific combining ability and the genetic components were also estimated. The role of gene actions governing the different traits studied is discussed.

Résumé

L'hétérobeltiosis (par rapport à une meilleure variété parentale) et l'hétérosis standard (par rapport à une variété standard) de traits quantitatifs de 10 larves et de 10 cocons parmi les hybrides entre cinq races multivoltines et trois races bivoltines de ver à soie, Bombyx mori L., ont été estimés. Les résultats ont indiqué que les hybrides entre les multivoltines femelles et les bivoltines mâles donnaient un hétérosis supérieur à ceux de leurs réciproques. La variance due à l'aptitude de combinaison spécifique et les composantes génétiques ont aussi été estimées. Le rôle des effets de gène qui réglent les différents traits étudiés est discuté.

Keywords

SilkwormBombyx morihybridsheterosisgene actionVer à soieBombyx morihybrideshétérosiseffet de gène
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 15 , Issue 3 , June 1994 , pp. 313 - 321
Copyright
Copyright © ICIPE 1994

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References

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