Volume 1, Issue 2 (4-2010)                   rap 2010, 1(2): 1-9 | Back to browse issues page

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Nematollahian S, Ghanipoor M, Seidavi A R. Effect of Selection Index on Cocoon Performance and Quality of Hybrids and Pure Silkworm Lines . rap. 2010; 1 (2) :1-9
URL: http://rap.sanru.ac.ir/article-1-147-en.html
Iran Silkworm Reserch Center (ISRC), Rasht, Iran
Abstract:   (2362 Views)

     In this experiment, the effect of selection index on performance of F1 hybrids was investigated in two commercial lines (153 and 154) in comparison with control groups (hybrids from the same lines that were selected randomly). These lines were affected by selection index program during 9 successive generations. Selected and non-selected groups were reard in village condisions by some sericulturer in Langerud, Anzali and Somesara cities in the spring of 2008. At the end of rearing, one kg of producted cocoon was collected from each selected and control groups for analyzing of cocoon weight, cocoon shell weight and cocoon shell percentage. Also family traits such as the best cocoon percentage, middle cocoon percentage, low cocoon percentage, double cocoon percentage, mean of cocoon production, larva vitality rate and pupa vitality rate in each group were recorded and analyzed. According to the results of mean comparisions and cocoon grading it be concluded that selection indexing method during 9 generations increased shell weight and cocoon shell but the total amount of cocoon production per silkworm egg box decresed in comparision with control group because of much sensivity of larvea and pupae from selection group to the common silkworm diseases.
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Type of Study: Research | Subject: Special
Received: 2013/04/21 | Revised: 2019/02/19 | Accepted: 2013/04/29 | Published: 2013/04/29

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