Article

Mapping quantitative trait loci regulating chicken body composition traits.

State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China.
Animal Genetics (impact factor: 2.4). 05/2009; 40(6):952-4. DOI:10.1111/j.1365-2052.2009.01911.x pp.952-4
Source: PubMed

ABSTRACT Genome scans were conducted on an F(2) resource population derived from intercross of the White Plymouth Rock with the Silkies Fowl to detect QTL affecting chicken body composition traits. The population was genotyped with 129 microsatellite markers and phenotyped for 12 body composition traits on 238 F(2) individuals from 15 full-sib families. In total, 21 genome-wide QTL were found to be responsible for 11 traits, including two newly studied traits of proventriculus weight and shank girth. Three QTL were genome-wide significant: at 499 cm on GGA1 (explained 3.6% of phenotypic variance, P < 0.01) and 51 cm on GGA5 (explained 3.3% of phenotypic variance, P < 0.05) for the shank & claw weight and 502 cm on GGA1 (explained 1.4% of phenotypic variance, P < 0.05) for wing weight. The QTL on GGA1 seemed to have pleiotropic effects, also affecting gizzard weight at 490 cm, shank girth at 489 cm and intestine length at 481 cm. It is suggested that further efforts be made to understand the possible pleiotropic effects of the QTL on GGA1 and that on GGA5 for two shank-related traits.

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Keywords

12 body composition traits
 
129 microsatellite markers
 
15 full-sib families
 
21 genome-wide QTL
 
chicken body composition traits
 
efforts
 
Genome scans
 
GGA1
 
gizzard weight
 
intestine length
 
phenotypic variance
 
proventriculus weight
 
QTL
 
shank & claw weight
 
shank girth
 
shank-related traits
 
Silkies Fowl
 
White Plymouth Rock
 
wing weight