Selection and segregation of herds for a valuable milk trait

Dooley, A.E.; Parker, W. J.; Blair, Hugh T.; López‐Villalobos, N.

doi:10.1016/j.livsci.2005.11.001

Cited by 3 publications

(2 citation statements)

References 26 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This has led to continued market pressure in the last few years in finding avenues to improve the concentration of beneficial minerals in milk in the most economical ways (Jenkins & McGuire, 2006). If observed, differences in milk between breeds can be used in strategies to promote milk from cows with a more favourable mineral profile for human health (Eijndhoven et al, 2011) and assigning such breed to a special brand product or high niche product (Dooley et al, 2006). An insight into breed differences in essential and non-essential minerals abundant in milk and important in maintaining healthy body physiological processes will help farmers aiming at producing a value added product (Croissant et al, 2007;Van Hulzen et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Winter and spring variation in daily milk yield and mineral composition of Jersey, Friesian cows and their crosses under a pasture-based dairy system

Nantapo¹,

Muchenje²

2014

SA J. An. Sci.

View full text Add to dashboard Cite

This study was conducted to determine the effects of genotype and season on daily milk yield (DMY) and mineral composition of pasture-based dairy cows. This was done by collecting data from 20 Friesian, 20 Jersey and 20 Friesian × Jersey crossbred cows in the early stage of their 4 th parity in winter and spring, respectively. Automated milk meters were used to measure the DMY. Mineral composition was determined by using the Inductively Coupled Plasma Optical Emission Spectrometric (ICP-OES) method. The data collected from milk yield and mineral composition were analysed using the general linear model of SAS. The results showed that milk yield was highest from Friesian cows both in spring and winter seasons while Jersey cows had the lowest yield. Seasonal effects were also observed in mineral concentrations, with winter having higher values for aluminium, boron, copper, iron, magnesium, manganese, zinc and sodium while phosphorus was higher in spring. Crossbred cows yielded higher concentrations of calcium, phosphorus and magnesium. It was therefore concluded that both milk yield and mineral compositions are affected by genotype and season.

show abstract

Section: Introductionmentioning

confidence: 99%

Winter and spring variation in daily milk yield and mineral composition of Jersey, Friesian cows and their crosses under a pasture-based dairy system

Nantapo¹,

Muchenje²

2014

SA J. An. Sci.

View full text Add to dashboard Cite

show abstract

“…For instance, digestion of starch in the small intestine seems to vary with starch origin (oat vs. barley, maize or sorghum), grain processing and starch supply (Potter et al, 1992 and see review of Julliand et al, 2006). However, large errors in these estimates have relatively small effects on km .…”

Section: Advantages and Limits Of The Ufc Systemmentioning

confidence: 99%

Routine methods for predicting the net energy and protein values of concentrates for horses in the UFC and MADC systems

Martin‐Rosset¹,

Andrieu²,

Vermorel³

et al. 2006

Livestock Science

View full text Add to dashboard Cite

Stakeholder involvement in establishing a milk quality sub-index in dairy cow breeding goals: a Delphi approach

Henchion

McCarthy

Resconi

et al. 2016

Animal

View full text Add to dashboard Cite

The relative weighting on traits within breeding goals are generally determined by bio-economic models or profit functions. While such methods have generally delivered profitability gains to producers, and are being expanded to consider non-market values, current approaches generally do not consider the numerous and diverse stakeholders that affect, or are affected, by such tools. Based on principles of respondent anonymity, iteration, controlled feedback and statistical aggregation of feedback, a Delphi study was undertaken to gauge stakeholder opinion of the importance of detailed milk quality traits within an overall dairy breeding goal for profit, with the aim of assessing its suitability as a complementary, participatory approach to defining breeding goals. The questionnaires used over two survey rounds asked stakeholders: (a) their opinion on incorporating an explicit sub-index for milk quality into a national breeding goal; (b) the importance they would assign to a pre-determined list of milk quality traits and (c) the (relative) weighting they would give such a milk quality sub-index. Results from the survey highlighted a good degree of consensus among stakeholders on the issues raised. Similarly, revelation of the underlying assumptions and knowledge used by stakeholders to make their judgements illustrated their ability to consider a range of perspectives when evaluating traits, and to reconsider their answers based on the responses and rationales given by others, which demonstrated social learning. Finally, while the relative importance assigned by stakeholders in the Delphi survey (4% to 10%) and the results of calculations based on selection index theory of the relative emphasis that should be placed on milk quality to halt any deterioration (16%) are broadly in line, the difference indicates the benefit of considering more than one approach to determining breeding goals. This study thus illustrates the role of the Delphi technique, as a complementary approach to traditional approaches, to defining breeding goals. This has implications for how breeding goals will be defined and in determining who should be involved in the decision-making process.

show abstract

Selection and segregation of herds for a valuable milk trait

Cited by 3 publications

References 26 publications

Winter and spring variation in daily milk yield and mineral composition of Jersey, Friesian cows and their crosses under a pasture-based dairy system

Winter and spring variation in daily milk yield and mineral composition of Jersey, Friesian cows and their crosses under a pasture-based dairy system

Routine methods for predicting the net energy and protein values of concentrates for horses in the UFC and MADC systems

Stakeholder involvement in establishing a milk quality sub-index in dairy cow breeding goals: a Delphi approach

Contact Info

Product

Resources

About