Effect of target trait in 2-trait selection index in two commercial lines of silkworm

Document Type : Genetic

Authors

1 Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Iran. P.O.Box: 1841

2 Iran Silkworm Research Center (ISRC), P.O. Box:41635- 3479, Rasht, Iran

3 Animal Science Department, Faculty of Agriculture, Islamic Azad University, Rasht Branch, P.O. Box:41335-3516, Rasht, Iran

Abstract

In this study, genetic parameters of cocoon weight, cocoon shell weight and cocoon shell Percentage in two commercial lines (153 & 154), after three Generation, were Estimated. To achieve these  goals, the  REML Algorithm, and  WOMBAT software were used. The base of selection  was  two  conventional  2-trait  index  (based  on  cocoon  weight- cocoon  shell  weight (A) and cocoon weight- cocoon shell percentage (B). for these goals were used from data in Iran  Silkworm  Research  Center.  Heritability's  of  cocoon  weight,  in  two  lines,  in  B  method was  upper  than  A  method.  In  Mean  Comparison  of  cocoon  treats,  between  methods,  to increase  cocoon  weight, a method  was  suggested.  In  cocoon  shell  weight,  different  between two methods, was no significant. Also between methods, to increase cocoon shell Percentage, B  method  was  suggested.  In  production  treats  and  Resistance,  between  methods  in Hybrids, was  no  significant.  Also  the  created  of  heterosis  Percentage  in  two methods was  same  but means of cocoon shell Percentage between methods, was significant.

Keywords

Journal of Animal Environment
Volume 5, Issue 3
November 2012
Pages 1-8

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