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:: Volume 10, Issue 2 (8-2017) ::
2017, 10(2): 91-108 Back to browse issues page
The use of QTL mapping to survey the some of growth traits and the Kleiber ratio index on chromosome two of Japanese quail
Ehsan Nasirifar Dr. , Ali K. Esmailizadeh Dr., Saeed S. Sohrabi Mr., Hasan Moradian Mr.
Department of Animal Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
Abstract:   (316 Views)

A cross F2 plan was used to identify quantitative trait loci (QTL) affecting growth on chromosome 2 of quail. In this study, a three-generation population was developed of reciprocal crosses of two strains of Japanese quail (white male layer × wild female broiler and wild male broiler × white female layer). Phenotypic records related to birds’ growth traits of F2 generation (422) were recorded. All three generations of birds for four microsatellite markers on chromosome 2 were genotyped. QTL analysis was performed with least squares interval mapping method based on regression in three various statistical models. In the first model, additive and dominance effects of QTL were fitted and body weight traits in four weeks (p<0.05), average daily gain in two to three weeks (p<0.05) and Kleiber ratio one to two weeks (p<0.05) were significant. In the second model the interaction of QTL and hatching were investigated. For the following four traits: body weight in two weeks (p<0.05), body weight in four weeks (p<0.05), average daily gain of one to two weeks (p<0.01) and Kleiber ratio of one to two weeks (p<0.05), significant QTLs were identified. In the third model, the additive and dominance effects of QTL by sex interaction were investigated and no significant trait was found. QTL variance identified in this study was in the range of 16.67 – 1.58. In this study, a number of genomic regions associated with growth and related traits were identified.

Keywords: Japanese quail, microsatellite markers, QTL mapping
Full-Text [PDF 940 kb]   (219 Downloads)    
Type of Study: Research | Subject: Special
Received: 2016/11/8 | Accepted: 2017/07/25 | Published: 2018/05/9
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Nasirifar E, K. Esmailizadeh A, S. Sohrabi S, Moradian H. The use of QTL mapping to survey the some of growth traits and the Kleiber ratio index on chromosome two of Japanese quail. Journal of Biosafety. 2017; 10 (2) :91-108
URL: http://journalofbiosafety.ir/article-1-154-en.html


Volume 10, Issue 2 (8-2017) Back to browse issues page
فصل نامه علمی-ترویجی ایمنی زیستی Journal of Biosafety
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