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A genome scan for quantitative trait loci associated with body weight at different developmental stages in chickens.
- Source :
-
Animal genetics [Anim Genet] 2006 Jun; Vol. 37 (3), pp. 276-8. - Publication Year :
- 2006
-
Abstract
- A genome scan to detect quantitative trait loci (QTL) affecting body weight in chickens was conducted on 238 F(2) 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 t-1 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 4.05-9.80% 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 t-1 to time t may involve two different sets of genes or gene actions.
Details
- Language :
- English
- ISSN :
- 0268-9146
- Volume :
- 37
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Animal genetics
- Publication Type :
- Academic Journal
- Accession number :
- 16734692
- Full Text :
- https://doi.org/10.1111/j.1365-2052.2006.01428.x