Chen HY, Zhang Q, Yin CC, Wang CK, Gong WJ, Mei G.
Affiliation:
State Key Laboratory for Agrobiotechnology, Key Laboratory of Animal Geneticsand Breeding of the Ministry of Agriculture, College of Animal Science andTechnology, China Agricultural University, Beijing 100094, China.
Title:
Detection of quantitative trait loci affecting milk production traits on bovinechromosome 6 in a Chinese Holstein population by the daughter design.
Fourteen microsatellite markers with a coverage of 63.5 cM on bovine chromosome6 were selected, and 26 sire families with 2,260 daughters were analyzed formapping quantitative trait loci (QTL) affecting 5 milk production traits in aChinese Holstein population. In the analyses across 26 families and within thelargest significant families with a one-QTL model fitted, a QTL near BMS470 wasdetected that affected fat yield at the 5% experiment-wide significance level.When a 2-QTL model was fitted in the across-family analysis, it was found thatthere might exist 2 QTL affecting the 3 yield traits, although the exact orempirical thresholds for the significance testing were unknown. In all analyses,the results for milk yield and protein yield were generally consistent, whichmight have resulted from the same genetic background for milk and protein yield.
