Relationship of residual feed intake and protein efficiency in lactating cows fed high- or low-protein diets

AOAC, 1990 Archer, J. A., A. Reverter, R. M. Herd, D. J. Johnston, and P. F. Arthur. 2002. Genetic variation in feed intake and efficiency of mature beef cows and relationships with post weaning measurements. 7th World Congr. Genet. Appl. Livest. Prod. 31:221–224. Bauman, 1980, Partitioning of nutrients during pregnancy and lactation: A review of mechanisms involving homeostasis and homeorhesis., J. Dairy Sci., 63, 1514, 10.3168/jds.S0022-0302(80)83111-0 Broderick, 2015, Replacing dietary soybean meal with canola meal improves production and efficiency of lactating dairy cows, J. Dairy Sci., 98, 5672, 10.3168/jds.2015-9563 Carrasquillo-Mangual, 2016, Repeatability of residual feed intake across dietary forage concentration., J. Animal Sci., 94, 348, 10.2527/jam2016-0727 Castro Bulle, 2007, Growth, carcass quality, and protein and energy metabolism in beef cattle with different growth potentials and residual feed intakes., J. Anim. Sci., 85, 928, 10.2527/jas.2006-373 Connor, 2015, Invited review: Improving feed efficiency in dairy production: Challenges and possibilities., Animal, 9, 395, 10.1017/S1751731114002997 Gidlund, 2015, Effects of soybean meal or canola meal on milk production and methane emissions in lactating dairy cows fed grass silage-based diets., J. Dairy Sci., 98, 8093, 10.3168/jds.2015-9757 Herd, 2004, Biological basis for variation in residual feed intake in beef cattle. 1. Review of potential mechanisms., Aust. J. Exp. Agric., 44, 423, 10.1071/EA02220 Huhtanen, 2009, A meta-analysis of the effects of dietary protein concentration and degradability on milk protein yield and milk N efficiency in dairy cows., J. Dairy Sci., 92, 3222, 10.3168/jds.2008-1352 Koch, 1963, Efficiency of feed use in beef cattle., J. Anim. Sci., 22, 486, 10.2527/jas1963.222486x Li, 2017, Neglect of lactation stage leads to naive assessment of residual feed intake in dairy cattle., J. Dairy Sci., 100, 9076, 10.3168/jds.2017-12775 Li, J., D. Chen, and S. Xu. 1998. The analysis on genetic factors of feed energy and protein efficiency of Chinese Simmental. Pages 133–136 in Proc. 6th World Congress on Genetics Applied in Livestock Production, Armidale, NSW, Australia. University of New England. Liinamo, 2015, Genetic parameters for residual energy intake and energy conversion efficiency in Nordic Red dairy cattle., Acta Agric. Scand. A Anim. Sci., 65, 63 Marett, 2017, Partitioning of energy and nitrogen in lactating primiparous and multiparous Holstein-Friesian cows with divergent residual feed intake., Anim. Prod. Sci., 57, 1499, 10.1071/AN16476 Nieuwhof, 1992, Genetic relationships between feed intake, efficiency and production traits in growing bulls, growing heifers and lactating heifers., Livest. Prod. Sci., 32, 189, 10.1016/S0301-6226(12)80001-7 NRC, 2001 Potts, 2015, Residual feed intake is repeatable for lactating Holstein dairy cows fed high and low starch diets., J. Dairy Sci., 98, 4735, 10.3168/jds.2014-9019 Prendiville, 2011, Animal performance and production efficiencies of Holstein-Friesian, Jersey and Jersey × Holstein-Friesian cows throughout lactation., Livest. Sci., 138, 25, 10.1016/j.livsci.2010.11.023 Pryce, 2012, Accuracy of genomic predictions of residual feed intake and 250-day body weight in growing heifers using 625,000 single nucleotide polymorphism markers., J. Dairy Sci., 95, 2108, 10.3168/jds.2011-4628 Richardson, 2004, Biological basis for variation in residual feed intake in beef cattle. 2. Synthesis of results following divergent selection., Aust. J. Exp. Agric., 44, 431, 10.1071/EA02221 Richardson, 2004, Metabolic differences in Angus steers divergently selected for residual feed intake., Aust. J. Exp. Agric., 44, 441, 10.1071/EA02219 Rius, 2012, Nitrogen metabolism and rumen microbial enumeration in lactating cows with divergent residual feed intake fed high-digestibility pasture., J. Dairy Sci., 95, 5024, 10.3168/jds.2012-5392 Sinclair, 2014, Reducing dietary protein in dairy cow diets: Implications for nitrogen utilization, milk production, welfare and fertility., Animal, 8, 262, 10.1017/S1751731113002139 St-Pierre, N. R. 2012. The costs of nutrients, comparison of feedstuffs prices and the current dairy situation. Buckeye News. The Ohio State University Extension. Accessed Jul. 20, 2013. http://dairy.osu.edu/bdnews/Volume%2014%20issue%206/Volume%2014%20Issue%206.html#Costs. Tyrrell, 1965, Prediction of the energy value of the milk., J. Dairy Sci., 48, 1215, 10.3168/jds.S0022-0302(65)88430-2 Tempelman, 2015, Heterogeneity in genetic and nongenetic variation and energy sink relationships for residual feed intake across research stations and countries., J. Dairy Sci., 98, 2013, 10.3168/jds.2014.8510 Thornhill, 2014, Whole-tract dry matter and nitrogen digestibility of lactating dairy cows selected for phenotypic divergence in residual feed intake., Anim. Prod. Sci., 54, 1460, 10.1071/AN14200 VandeHaar, 2016, Harnessing the genetics of the modern dairy cow to continue improvements in feed efficiency., J. Dairy Sci., 99, 4941, 10.3168/jds.2015-10352 Waghorn, 2012, Measuring residual feed intake in dairy heifers fed an alfalfa (Medicago sativa) cube diet., J. Dairy Sci., 95, 1462, 10.3168/jds.2011-4670 Wessels, 1997, Effect of amino acid supplementation on whole-body protein turnover in Holstein steers., J. Anim. Sci., 75, 3066, 10.2527/1997.75113066x Wildman, 1982, A dairy cow body condition scoring system and its relationship to selected production characteristics., J. Dairy Sci., 65, 495, 10.3168/jds.S0022-0302(82)82223-6 Williams, 2011, Variation in residual feed intake in Holstein-Friesian dairy heifers in southern Australia., J. Dairy Sci., 94, 4715, 10.3168/jds.2010-4015 Xi, 2016, Biological mechanisms related to differences in residual feed intake in dairy cows., Animal, 10, 1311, 10.1017/S1751731116000343 Zamani, 2011, Genetic parameters of protein efficiency and its relationships with yield traits in lactating dairy cows., Livest. Sci., 138, 272, 10.1016/j.livsci.2011.01.006 Zetouni, 2017, Direct multitrait selection realizes the highest genetic response for ratio traits., J. Anim. Sci., 95, 1921