Mapping of quantitative trait loci for lactation persistency traits in German Holstein dairy cattle

Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie
B HarderE Kalm

Abstract

A whole genome scan to map quantitative trait loci (QTL) for persistency of milk yield (PMY), persistency of fat yield (PFY), persistency of protein yield (PPY) and persistency of milk energy yield (PEY) was performed in a granddaughter design in the German Holstein dairy cattle population. The analysis included 16 paternal half-sib families with a total of 872 bulls. The analysis was carried out for the first lactation and for the first three lactations combined using univariate weighted multimarker regression. Controlling the false discovery rate across traits and data sets at a level of 0.15 and treating the four persistency traits as different traits revealed 27 significant QTL. A total of 12 chromosomes showed significant QTL effects on a chromosomewise basis. The DGAT1 effect was highly significant for PPY and protein yield. A haplotype analysis using results of previous studies of the same design revealed a co-segregation of various persistency QTL and QTL affecting health traits like dystocia and stillbirth and functional traits like non-return rate 90 and somatic cell score.

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Citations

Jul 5, 2012·Physiological Genomics·D L HadsellP Williamson
Nov 7, 2009·Genetics, Selection, Evolution : GSE·Klara L Verbyla, Arunas P Verbyla
Apr 5, 2013·PloS One·Dunfei PanJianfeng Liu
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Nov 27, 2010·Genetics, Selection, Evolution : GSE·Flavie TortereauJuliette Riquet
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Dec 8, 2009·Journal of Animal Science·W M SnellingG L Bennett

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