Detection of quantitative trait loci affecting non-return rate in French dairy cattle

Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie
S Ben JemaaM Gautier

Abstract

The purpose of this study was to map quantitative trait loci (QTL) influencing female fertility estimated by non-return rate (NRR) in the French dairy cattle breeds Prim'Holstein, Normande and Montbeliarde. The first step was a QTL detection study on NRR at 281 days after artificial insemination on 78 half-sib families including 4993 progeny tested bulls. In Prim'Holstein, three QTL were identified on Bos taurus chromosomes BTA01, BTA02 and BTA03 (p < 0.01), whereas one QTL was identified in Normande on BTA01 (p < 0.05). The second step aimed at confirming these three QTL and refining their location by selecting and genotyping additional microsatellite markers on a sub-sample of 41 families from the three breeds using NRR within 56, 90 and 281 days after AI. Only the three QTL initially detected in Prim'Holstein were confirmed. Moreover, the analysis of NRR within 56, 90 and 281 days after AI allowed us to distinguish two FF QTL on BTA02 in Prim'Holstein, one for NRR56 and one for NRR90. Estimated QTL variance was 18%, 14%, 11.5% and 14% of the total genetic variance, respectively, for QTL mapping to BTA01, BTA02 (NRR90 and NRR56) and BTA03.

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Citations

Jul 1, 2010·Animal : an International Journal of Animal Bioscience·N C FriggensH V Petit
Nov 19, 2013·Genome Génome / Conseil National De Recherches Canada·Duc LuStephen P Miller
Jun 22, 2010·Journal of the Science of Food and Agriculture·Josef PribylJana Pribylova
Dec 30, 2014·Animal : an International Journal of Animal Bioscience·D LedouxP Humblot
Nov 25, 2017·Reproduction : the Official Journal of the Society for the Study of Fertility·S Coyral-CastelJ Dupont
Sep 1, 2021·Genetics, Selection, Evolution : GSE·Bayode O MakanjuolaChristine F Baes

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