Non-random mating for selection with restricted rates of inbreeding and overlapping generations

Genetics, Selection, Evolution : GSE
Anna K Sonesson, Theo H E Meuwissen

Abstract

Minimum coancestry mating with a maximum of one offspring per mating pair (MC1) is compared with random mating schemes for populations with overlapping generations. Optimum contribution selection is used, whereby DeltaF is restricted. For schemes with DeltaF restricted to 0.25% per year, 256 animals born per year and heritability of 0.25, genetic gain increased with 18% compared with random mating. The effect of MC1 on genetic gain decreased for larger schemes and schemes with a less stringent restriction on inbreeding. Breeding schemes hardly changed when omitting the iteration on the generation interval to find an optimum distribution of parents over age-classes, which saves computer time, but inbreeding and genetic merit fluctuated more before the schemes had reached a steady-state. When bulls were progeny tested, these progeny tested bulls were selected instead of the young bulls, which led to increased generation intervals, increased selection intensity of bulls and increased genetic gain (35% compared to a scheme without progeny testing for random mating). The effect of MC1 decreased for schemes with progeny testing. MC1 mating increased genetic gain from 11-18% for overlapping and 1-4% for discrete generations, when comp...Continue Reading

Citations

Apr 13, 2012·Genetics, Selection, Evolution : GSE·Kahsay G NireaTheo H E Meuwissen
Feb 11, 2011·BMC Genetics·Jean-Jacques ColleauIsabelle Palhière
May 10, 2007·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·K OyamaF Mukai
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·J FernándezA Mäki-Tanila
Nov 9, 2011·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·I Cervantes, T H E Meuwissen
Apr 1, 2015·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·R J KerrB Tier
Sep 23, 2008·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·J J Colleau, T Tribout
Sep 22, 2016·Genetics, Selection, Evolution : GSE·Isabel CervantesTheo H E Meuwissen
Jul 30, 2015·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·H ChapuisJ J Colleau
Nov 4, 2020·Animals : an Open Access Journal From MDPI·Nuno CarolinoAntónio Vicente
Nov 14, 2015·G3 : Genes - Genomes - Genetics·Diego BersabéAurora García-Dorado

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