QTL affecting body weight in a candidate region of cattle chromosome 5
Genet. mol. biol
;
26(3): 259-265, 2003. ilus, tab, graf
Article
in English
| LILACS
| ID: lil-346314
ABSTRACT
The objective of this work was to identify QTLs for liveweight in a candidate region of bovine chromosome 5. Half-sib families from two lines, one traditional and the other new, of Canchim beef cattle (5/8 Charolais + 3/8 Zebu) were genotyped for four microsatellite markers, including the microsatellite in the IGF-1 (insulin-like growth factor-1) promoter region. Significant differences in allele distribution between the two lines were found for three markers. Interval mapping analyses in this region indicated the presence of a QTL controlling birth weight (p < 0.05) and of a QTL influencing breeding value for yearling weight (p < 0.01) in the newer line of the breed. The previously identified interaction between the IGF-1 genotype and genetic group strengthens the hypothesis of a linked QTL rather than an IGF-1 effect on growth traits in the Canchim cattle
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Polymorphism, Genetic
/
Cattle
/
Chromosome Mapping
/
Quantitative Trait, Heritable
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
Genet. mol. biol
Journal subject:
Genetics
Year:
2003
Type:
Article
Affiliation country:
Brazil
/
United States
Institution/Affiliation country:
Embrapa Pecuária Sudeste/BR
/
U. S Meat Animal Research Center/US
/
Universidade Estadual de São Paulo/BR
/
Universidade Federal de São Carlos/BR
/
Universidade de São Paulo/BR
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