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Crossbreeding as a strategy in dairy cattle herds

Clasen, Julie (2021). Crossbreeding as a strategy in dairy cattle herds. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-839-4
eISBN 978-91-7760-840-0
[Doctoral thesis]

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Abstract

This thesis aimed to explore benefits of dairy crossbreeding at herd level and form recommendations for dairy farmers, advisors, and breeding companies. A survey study revealed that Swedish dairy farmers can be divided into two groups: those supporting crossbreeding and those not supporting it. SimHerd Crossbred and ADAM were used to simulate various crossbreeding strategies and estimate the economic effects. Both terminal and rotational crossbreeding involving Swedish Red and Swedish Holstein increases the yearly economic return in organic and conventional Swedish production systems, compared with purebreeding Swedish Holstein. Also, terminal crossbreeding combined with the genetic benefits of sexed semen and genomic testing of purebred animals is economically beneficial. Terminal crossbreeding between a low-yielding native breed and a high-yielding breed improves the economic result. Combined with marketing of niche products, terminal crossbreeding may be beneficial as a strategy for conserving native dairy cattle breeds. Genomic breeding values for crossbred animals could be predicted with a model using summary statistics from purebred reference populations with almost as high prediction accuracies as if full genotype and phenotype information was available. Future research is needed on crossbreeding schemes utilizing genomic data and the effect of crossbreeding on the environmental footprint.

Authors/Creators:Clasen, Julie
Title:Crossbreeding as a strategy in dairy cattle herds
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2021
Number:2021:81
Number of Pages:96
Publisher:Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-839-4
ISBN for electronic version:978-91-7760-840-0
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:crossbreeding, heterosis, dairy cattle, sexed semen, beef semen, genomic prediction
URN:NBN:urn:nbn:se:slu:epsilon-p-114305
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114305
ID Code:26111
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: SLUpub Connector
Deposited On:15 Nov 2021 15:26
Metadata Last Modified:15 Nov 2021 15:31

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