Heritability for enteric methane emission from Danish Holstein cows using a non-invasive FTIR method

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Enteric methane emission from ruminants contributes substantially to the greenhouse effect. Few studies have focused on the genetic variation in enteric methane emission from dairy cattle. One reason for that is the limited
number of methods appropriate for large scale phenotyping to measure a sufficient number of animals available to estimation of additive genetic variance. A method to measure methane in dairy cattle using a Fourier Transformed Infrared (FTIR) approach during milking in Automatic milking systems was implemented by Lassen et al . (2012). Such data showed repeatability estimates around 0.40 for the ratio between methane and carbon dioxide concentrations. Using the ratio between methane and carbon dioxide as a phenotype makes it possible to quantify the amount of methane produced
per cow, because the amount of carbon dioxide can be estimated from variables such as weight, milk production and feed intake (Madsen et al
., 2010). In a study of 548 heifers a heritability estimate of 0.35 was obtained for predicted methane emission based on registrations on feed intake rather than on direct measurements (de Haas et al., 2011). Estimates of this
magnitude justify the use of genetic tools to reduce methane emission from dairy cattle. Another study (Wall et al ., 2010) has shown that selecting for correlated indicator traits such as productivity and efficiency would help lowering the methane emission from the cattle production. Furthermore, it is still important to have emphasis on production traits through use of a
total merit indexes to avoid a decline in economically important traits when reducing methane emission. However, key genetic parameters are still inaccurate and would therefore benefit from being re-estimated on larger numbers of animals and records based on reliable direct methods. The objective of this study was to estimate the heritability for enteric methane
emission from Danish Holstein cows using a non-invasive method
OriginalsprogEngelsk
TidsskriftAdvances in the Biosciences
Vol/bind4
Nummer2
Sider (fra-til)280
Antal sider1
ISSN0065-3446
DOI
StatusUdgivet - jun. 2013
Begivenhed5th Greenhouse Gases and Animal Agriculture Conference - Dublin, Irland
Varighed: 22 jun. 201327 jun. 2013

Konference

Konference5th Greenhouse Gases and Animal Agriculture Conference
LandIrland
ByDublin
Periode22/06/201327/06/2013

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