2019
DOI: 10.3168/jds.2019-16454
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Invited review: Determination of large-scale individual dry matter intake phenotypes in dairy cattle

Abstract: Feed efficiency has been widely studied in many areas of dairy science and is currently seeing renewed interest in the field of breeding and genetics. A critical part of determining how efficiently an animal utilizes feed is accurately measuring individual dry matter (DM) intake. Currently, multiple methods are used to measure feed intake or determine the DM content of that feed, resulting in different levels of accuracy of measurement. Furthermore, the scale at which data need to be collected for use in genet… Show more

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Cited by 43 publications
(33 citation statements)
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“…To genetically select animals for improved feed efficiency, pedigree information and individual phenotypic records associated with feed intake and production traits are required. The simplest way to record DMI is based on the amount of feed offered and refused by each cow per day, with the associated dry matter percentage (Seymour et al 2019). Other important variables to be recorded for assessment of feed efficiency are milk production and composition, lactation stage, water intake, diet composition, bodyweight and BCS over the course of lactation, health/disease events, and reproductive performance traits.…”
Section: Data Collection and International Collaborations For Data Shmentioning
confidence: 99%
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“…To genetically select animals for improved feed efficiency, pedigree information and individual phenotypic records associated with feed intake and production traits are required. The simplest way to record DMI is based on the amount of feed offered and refused by each cow per day, with the associated dry matter percentage (Seymour et al 2019). Other important variables to be recorded for assessment of feed efficiency are milk production and composition, lactation stage, water intake, diet composition, bodyweight and BCS over the course of lactation, health/disease events, and reproductive performance traits.…”
Section: Data Collection and International Collaborations For Data Shmentioning
confidence: 99%
“…In dairy cattle, RFI is estimated by regressing dry matter intake (DMI) on a variety of physiological activities, which commonly include production (milk yield or energy-corrected milk), metabolic body weight, changes in body weight or body condition score (BCS), and stage of lactation (Connor 2015;Byskov et al 2017;Seymour et al 2019). Other residual traits have also been analyzed in place of RFI to obtain an estimate closer to the biology behind feed efficiency, such as RSP (Coleman et al 2010).…”
Section: Introductionmentioning
confidence: 99%
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“…On the other hand, the residual feed intake (RFI), predominantly used in beef cattle [9,10], has also provided relevant data about the efficiency of Bos taurus taurus dairy cows [11,12]. The RFI is calculated by the difference between actual and expected feed intake of a group of animals over a defined period of time [13]. Residual weight gain (RG) is not a usually index for dairy cattle, but may be interesting due to allow a selection of animals with better average daily gain without increasing dry matter intake [14].…”
Section: Introductionmentioning
confidence: 99%
“…Given the economic impact of animal feed costs on farmer's profitability, feed efficiency has been widely discussed as a key phenotype to be included in the selection indexes and for management decisions on livestock operations (Berry and Crowley, 2013;Berry, 2015;Seymour et al, 2019). Selecting animal for feed efficiency is highly attractive, but the practical implementation might be challenging, primarily because individual feed intake records on a large-scale are unavailable to date, and secondly some aspect of production, such as milk output or body weight, and energy sinks including maintenance, need to be accounted to determine individual feed efficiency (Berry and Crowley, 2013;Connor, 2015).…”
Section: Feed Intakementioning
confidence: 99%