Review: Genetic and genomic selection as a methane mitigation strategy in dairy cattle

Lassen, Jan; Difford, Gareth Frank

doi:10.1017/s1751731120001561

Cited by 37 publications

(35 citation statements)

References 79 publications

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“…Potential traits might include urinary urea N content, CH 4 , or associated traits such as feed intake, with recent research showing promise for routinely collected proxies for these phenotypes (Vanlierde et al, 2016;Beatson et al, 2019;Lahart et al, 2019). Lassen and Difford (2020) proposed genomic selection as a method of increasing the rate of genetic gain for environmental traits. While Pryce and Haile-Mariam (2020) proposed merging international data sets, as per Berry et al (2014) for feed intake, as a strategy to generate breeding values.…”

Section: Discussionmentioning

confidence: 99%

Greenhouse gas emissions and nitrogen efficiency of dairy cows of divergent economic breeding index under seasonal pasture-based management

Lahart

Shalloo²,

Herron³

et al. 2021

Journal of Dairy Science

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Greenhouse gas (GHG) emissions and nitrogen (N) efficiencies were modeled for 2 genetic groups (GG) of Holstein-Friesian cows across 3 contrasting feeding treatments (FT). The 2 GG were (1) high economic breeding index (EBI) animals representative of the top 5% of cows nationally (elite) and (2) EBI representative of the national average (NA). The FT represented (1) generous feeding of pasture, (2) a slight restriction in pasture allowance, and (3) a high-concentrate feeding system with adequate pasture allowance. Greenhouse gas and N balance models were parameterized using outputs generated from the Moorepark Dairy Systems model, a stochastic budgetary simulation model, having integrated biological data pertaining to the 6 scenarios (2 GG × 3 FT) obtained from a 4-yr experiment conducted between 2013 and 2016. On a per hectare basis, total system GHG emissions were similar for both elite and NA across the 3 FT. Per unit of product, however, the elite group had 10% and 11% lower GHG emissions per kilogram of fat-and protein-corrected milk and per kilogram of milk solids (MSO; fat + protein kg), respectively, compared with the NA across the 3 FT. The FT incorporating high concentrate supplementation had greater absolute GHG emissions per hectare as well as GHG per kilogram of fat-and protein-corrected milk and MSO. The elite group had a slightly superior N use efficiency (N output/N input) and lower N surplus (N input -N output) compared with the NA group. The high concentrate FT had an inferior N use efficiency and a higher N surplus. The results of the current study demonstrate that breeding for increased EBI will lead to a general improvement in GHG emissions per unit of product as well as improved N efficiency. The results also illustrate that reducing concentrate supplementation will reduce GHG emissions, GHG emissions in-tensity, while improving N efficiency in the context of pasture-based dairy production.

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Section: Discussionmentioning

confidence: 99%

Greenhouse gas emissions and nitrogen efficiency of dairy cows of divergent economic breeding index under seasonal pasture-based management

Lahart

Shalloo²,

Herron³

et al. 2021

Journal of Dairy Science

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“…Through genomic selection, it is possible to decrease the methane production from cows [79]. However, there is a classic unintended consequences dilemma in using genomics to reduce CH 4 emissions from cows: CH 4 production is related to milk production [80], highlighting that apparently simple solutions have to be thoroughly investigated.…”

Section: Reducing Methane Emissions From Cowsmentioning

confidence: 99%

Biotechnologies to Bridge the Schism in the Bioeconomy

Philp

2021

Energies

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Schism is the new normal for the bioeconomy concept. Since its proliferation in governments, the concept has been adapted to fit national or regional exigencies. Earlier this century the knowledge-based bioeconomy (KBBE) in Europe was seen as a technical and knowledge fix in the evolving sustainability landscape. At the OECD, the concept was further honed by imagining a future where biotechnologies contribute significantly to economic growth and development. Countries started to make national bioeconomy strategies. Some countries have diverged and made the bioeconomy both much larger and more general, involving a wide variety of sectors, such as industry, energy, healthcare, agriculture, aquaculture, forestry and fishing. Whatever the approach, what seems to be consistent is the need to reconcile environmental, social and economic sustainability. This paper attempts to establish one schism that could have ramifications for the future development of the bioeconomy. Some countries, including some of the largest economies but not exclusively so, are clearly following a biotechnology model, whereas others are clearly not. In the wake of the COVID-19 pandemic, biotechnologies offer outstanding potential in healthcare, although this sector is by no means included in all bioeconomy strategies. The paper also attempts to clarify how biotechnologies can address the grand challenges and the United Nations Sustainable Development Goals. The communities of scientists seem to have no difficulty with this, but citizens and governments find it more difficult. In fact, some biotechnologies are already well established, whereas others are emerging and more controversial.

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“…Before integrating the mitigation of enteric methane emissions in a breeding program for dairy cows, phenotypic and genetic relationships with other traits must be analysed (Lassen et al, 2020). This includes traits from the following categories: production, feed efficiency, conformation, health, and reproduction.…”

Section: Reducing Methane Emissions Through Animal Breedingmentioning

confidence: 99%

Genetics of enteric methane emissions of Dutch dairy cows : Climate Envelop project 2019

Haas¹,

Wias²,

Aldridge³

et al. 2021

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De Nederlandse landbouw staat voor de uitdaging om methaanuitstoot in 2030 met 2,1 Mton te verminderen en nog verder in 2050. Omdat methaanuitstoot van melkkoeien het belangrijkste onderdeel is van deze voetafdruk, hebben boeren dringend behoefte aan efficiënte en kosteneffectieve opties om de methaanuitstoot verminderen. Fokkerij, waarbij gebruik wordt gemaakt van de natuurlijke variatie van dieren in methaanemissies, is een strategie die kosteneffectief, permanent en cumulatief is. Het doel van deze studie was om het potentieel te onderzoeken van het fokken op dieren met een lage uitstoot. De resultaten laten zien dat er fenotypische (709 ppm) en genetische variatie (474 ppm) is in methaanemissies tussen koeien gemeten door sniffers. De erfelijkheidsgraad van methaanemissies was 0,23, wat aangeeft dat het mogelijk is om genetische vooruitgang te bereiken met behulp van selectie.

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Review: Genetic and genomic selection as a methane mitigation strategy in dairy cattle

Cited by 37 publications

References 79 publications

Greenhouse gas emissions and nitrogen efficiency of dairy cows of divergent economic breeding index under seasonal pasture-based management

Greenhouse gas emissions and nitrogen efficiency of dairy cows of divergent economic breeding index under seasonal pasture-based management

Biotechnologies to Bridge the Schism in the Bioeconomy

Genetics of enteric methane emissions of Dutch dairy cows : Climate Envelop project 2019

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