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Karyomapping for simultaneous genomic evaluation and aneuploidy screening of preimplantation bovine embryos: The first live-born calves

Turner, Kara J., Silvestri, Giuseppe, Black, David H., Dobson, Gemma, Smith, Charlotte, Handyside, Alan H, Sinclair, Kevin D., Griffin, Darren K. (2019) Karyomapping for simultaneous genomic evaluation and aneuploidy screening of preimplantation bovine embryos: The first live-born calves. Theriogenology, 125 . pp. 249-258. ISSN 0093-691X. E-ISSN 1879-3231. (doi:10.1016/j.theriogenology.2018.11.014) (KAR id:70423)

Abstract

In cattle breeding, the development of genomic selection strategies based on single nucleotide polymorphism (SNP) interrogation has led to improved rates of genetic gain. Additionally, the application of genomic selection to in-vitro produced (IVP) embryos is expected to bring further benefits thanks to the ability to test a greater number of individuals before establishing a pregnancy and to ensure only carriers of desirable traits are born. However, aneuploidy, a leading cause of developmental arrest, is known to be common in IVP embryos. Karyomapping is a comprehensive screening test based on SNP typing that can be used for simultaneous genomic selection and aneuploidy detection, offering the potential to maximize pregnancy rates. Moreover, Karyomapping can be used to characterize the frequency and parental origin of aneuploidy in bovine IVP embryos, which have remained underexplored to date. Here, we report the use of Karyomapping to characterize the frequency and parental origin of aneuploidy in IVP bovine embryos in order to establish an estimate of total aneuploidy rates in each parental germline. We report an estimate of genome wide recombination rate in cattle and demonstrate, for the first time, a proof of principle for the application of Karyomapping to cattle breeding, with the birth of five calves after screening. This combined genomic selection and aneuploidy screening approach was highly reliable, with calves showing 98% concordance with their respective embryo biopsies for SNP typing and 100% concordance with their respective biopsies for aneuploidy screening. This approach has the potential to simultaneously improve pregnancy rates following embryo transfer and the rate of genetic gain in cattle breeding, and is applicable to basic research to investigate meiosis and aneuploidy.

Item Type: Article
DOI/Identification number: 10.1016/j.theriogenology.2018.11.014
Uncontrolled keywords: IVP, Cattle, Genomic selection, EBV, Embryo screening, Aneuploidy
Subjects: Q Science > QR Microbiology
Divisions: Divisions > Division of Natural Sciences > Biosciences
Depositing User: Darren Griffin
Date Deposited: 28 Nov 2018 14:57 UTC
Last Modified: 04 Mar 2024 16:59 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/70423 (The current URI for this page, for reference purposes)

University of Kent Author Information

Turner, Kara J..

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Silvestri, Giuseppe.

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Handyside, Alan H.

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Griffin, Darren K..

Creator's ORCID: https://orcid.org/0000-0001-7595-3226
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