Phenotypic and genetic parameters for blood urea nitrogen concentration and its genetic relationships with growth traits in Hereford cattle

被引：0

作者：

Beatson, Philip R. ^{[1
]}

Cullen, Neil G. ^{[2
]}

Lee, Yvonne V. ^{[3
]}

机构：

[1] CRV Ambreed, Hamilton, New Zealand

[2] AgResearch Ltd, Ruakura Agr Ctr, Anim Genom, Hamilton, New Zealand

[3] Bluestone Herefords, Cannington, South Canterbur, New Zealand

来源：

NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH | 2025年

关键词：

Nitrogen leaching; urinary nitrogen; blood urea nitrogen; heritability; genetic correlation; MILK UREA;

D O I：

10.1080/00288233.2024.2445263

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

It is desirable to mitigate nitrogen (N) losses in the forms of nitrate to groundwater and nitrous oxide to the atmosphere from urine patches deposited by grazing cattle. Concentrations of milk and blood urea pools within the body are positively correlated with daily urinary nitrogen excretion. In this study, blood urea nitrogen concentrations (BUN) in mobs of Hereford beef cattle were influenced by feed type. BUN heritability was 0.28 suggesting that BUN can be manipulated by selective breeding, while its repeatability was 0.47. No deleterious relationships of BUN with growth rate or carcass composition traits were revealed but work is required to investigate the influence of genetic manipulation of BUN on urinary nitrogen concentration and volume.

引用

页数：6

共 10 条

[1] Genetic variation in milk urea nitrogen concentration of dairy cattle and its implications for reducing urinary nitrogen excretion
Beatson, P. R.
Meier, S.
Cullen, N. G.
Eding, H.
[J]. ANIMAL, 2019, 13 (10) : 2164 - 2171
[2] DairyNZ, 2023, Feed-fundamentals-feed values
[3] Garcia-Muniz J. G., 2013, Proceedings of the New Zealand Society of Animal Production, V73, P108
[4] Gilmore A.R., 2009, Asreml User Guide Release 3.0
[5] Kohn RA, 2005, J ANIM SCI, V83, P879
[6] Genetic analysis of milk urea nitrogen and relationships with yield and fertility across lactation
Mucha, S.
Strandberg, E.
[J]. JOURNAL OF DAIRY SCIENCE, 2011, 94 (11) : 5665 - 5672
[7] Oregon State University, OSU Extension Service
[8] The Challenge of the Urine Patch for Managing Nitrogen in Grazed Pasture Systems
Selbie, Diana R.
Buckthought, Laura E.
Shepherd, Mark A.
[J]. ADVANCES IN AGRONOMY, VOL 129, 2015, 129 : 229 - 292
[9] Spek JW., 2013, PhD thesis
[10] Genetic parameters of blood urea nitrogen and milk urea nitrogen concentration in dairy cattle managed in pasture-based production systems of New Zealand and Australia
van den Berg, Irene
Ho, Phuong N.
Haile-Mariam, Mekonnen
Beatson, Phil R.
O'Connor, Erin
Pryce, Jennie E.
[J]. ANIMAL PRODUCTION SCIENCE, 2021, 61 (18) : 1801 - 1810

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