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A genome scan for quantitative trait loci associated with body weight at different developmental stages in chickens.
- Source :
-
Animal Genetics . Jun2006, Vol. 37 Issue 3, p276-278. 3p. 1 Chart, 1 Graph. - Publication Year :
- 2006
-
Abstract
- A genome scan to detect quantitative trait loci (QTL) affecting body weight in chickens was conducted on 238 F2 chickens from a reciprocal cross of Silky Fowl and White Plymouth Rock using 125 microsatellite markers covering 23 autosomes and the Z chromosome. Two types of QTL were considered: static QTL (SQ) and developmental QTL (DQ). Static QTL affected the body weight from hatch to time t, and DQ affected the body weight from time tâ1 to time t. Six SQ and nine DQ were detected. Of these QTL, four reached a genome-wide significance of 5% or better, with SQ1 and DQ1 being the most significant QTL. Static QTL1 was on chromosome 1 between GCT0006 and MCW0106 and explained 4.05â9.80% of the phenotypic variation in body weights from 3 to 12 weeks of age. At 9, 10 and 11 weeks, the genome-wide significance thresholds of SQ1 were <1%. Developmental QTL1 was located on chromosome 1 between MCW0168 and GCT0006, and explained 2.75% of the phenotypic variation for body weight from week 7 to 8 with a genome-wide significance level <1%. The results suggest that body weight from hatch to time t and developmental growth from time tâ1 to time t may involve two different sets of genes or gene actions. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GENOMES
*CHICKENS
*BODY weight
*MICROSATELLITE repeats
*GENETIC markers
Subjects
Details
- Language :
- English
- ISSN :
- 02689146
- Volume :
- 37
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Animal Genetics
- Publication Type :
- Academic Journal
- Accession number :
- 20870841
- Full Text :
- https://doi.org/10.1111/j.1365-2052.2006.01428.x