Mapping Quantitative Trait Loci Associated with Growth Quality Traits in a Chicken Population on Chromosome 8, 9, 10, 11, 13

摘要

The objective of the current study was to identify QTL associated with growth trait. An F2 resource population of Gushi chicken crossing with Anka broiler was used in the current study. Thirty two growth traits at different weeks in this study were measured in the F2 population which included body weight (measured every 2 weeks from hatch) and body size index measured every 4 weeks containing shank length, shank circle, chest depth chest width, chest angle, pelvis width, breast bone length and body slanting length. A total of 860 F2 individuals produced from 7 F1 families their parents and the grandparents F0 birds were genotyped by 19 microsatellite markers on Chromosome 8, 9, 10, 11 and 13. Interval mapping was conducted to identify putative QTL. For the 32 growth traits, the QTL significant at the genome wide level that affected bodyweight at all ages were identified on Chromosomes 8. The QTL related to BW at early ages were identified on Chromosome 10 and 11 and only one QTL affected body weight were located on Chromosome 13. The QTL for body size index were first in detail reported on all the five chromosomes.