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Paper Information

Journal:   MODERN GENETICS JOURNAL (MGJ)   SPRING 2013 , Volume 8 , Number 1 (32); Page(s) 11 To 18.
 
Paper: 

ESTIMATION OF GENETIC PARAMETERS AND IMPROVEMENT IN THE SILKWORM COCOON WEIGHT AND SHELL COCOON WEIGHT TRAITS USING DIFFERENT GOALS OF INDIVIDUAL SELECTION

 
 
Author(s):  NEMATOLLAHIAN S., BARZIN P., MIRHOSSEINI S.Z., NASERANI M., SEIDAVI A.R.*
 
* ISLAMIC AZAD UNIVERSITY, RASHT, IRAN
 
Abstract: 

Genetic parameters of cocoon weight, cocoon shell weight and cocoon shell percentage was estimated in two commercial lines during three generations under individual selection and random selection schedule. The individual selection program included (A) individual selection based on cocoon weight and (B) individual selection based on cocoon shell weight. The data collected from two commercial lines 153 and 154 were used in the Iran Silkworm Research Centre. Genetic parameters of cocoon weight and cocoon shell weight were estimated using WOMBAT software and REML algorithm. For both selection methods, high heritability were estimated for cocoon weight and cocoon shell weight. Both lines had higher heritability for traits under individual selection. Since there are high and positive genetic correlation between cocoon weight and cocoon shell weight, so it is showed we can improve one trait using selection based on another trait. Generally based on obtained results, it must be noted we can improve cocoon weight average in the short term using strategy A. If our purpose is improvement of the cocoon shell weight in the hybrids, strategy B is effective and can be recommended. Also strategy A improved cocoon shell percentage.

 
Keyword(s): COCOON SHELL WEIGHT, COCOON WEIGHT, GENETIC PARAMETERS, INDIVIDUAL SELECTION, SILKWORM
 
References: 
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