by reaganbluel
Dairy Science Digest - a podcast developed to share the MOST current research published in the Journal of Dairy science. Hear directly from the research authors on how their results can impact your herd’s profitability. Science you can base your management decisions around. Designed to rarely exceed 30 minutes, this podcast provides ONLY the ”need to know” info for dairy producers. Keywords: dairy, science, reproduction, production, extension, cattle, MIZZOU, MU, Dairy Team, #2xAg2030
Language
🇺🇲
Publishing Since
5/14/2020
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May 19, 2026
The A2 protein variant was identified back in the 60s as a genetic difference among cattle. Recent consumer interest has driven a demand for A2/A2 milk, resulting in increased prevalence in the dairy industry. Acknowledging the importance of protein in cheese production, food scientists have worked with cheese makers to both identify and reduce the impact of A2 on cheese yield. Beyond yield impacts, Dr. Ibanez and his team of researchers at the Center for Dairy Research wanted to better understand specifically how proteolysis differs when casein proteins change and if this knowledge can ultimately be used to improve the human health impacts of cheese. Listen in to better understand how one slight change in amino acid sequence can transform the ripening process and ultimately the nutrients in your cheese. Topics of discussion 1:26 Introduction of Dr. Rodrigo Ibanez 2:32 Different proteins present in milk, based on genetics 4:00 How A2 milk impacts cheese making efficiency 5:52 Description of 4 types of casein in milk protein8:07 Cheese yield losses with A2 milk ameliorated with skill of cheese makers. 9:46 Art of stirring the curd 10:30 Sire selection for A2, is it moving the mark? 12:10 Experimental design12:50 How does A2 milk impact cheese quality – gel firmness and ripening14:14 Protein and Fatty acid impact on flavor15:50 Description of β-casomorphin peptides19:11 A2 tend to be a little bit firmer then A1, and slower digestion. 20:20 Opioid activity in cheese 21:00 Testing for A2 protein fractions to confirm A2 milk was used for A2 cheese22:42 Will aging help all cheeses be easier to digest? β-casomorphin 7 concentrations. 25:04 β-casomorphin impact on human health26:54 What do you want ‘boots on the ground’ dairymen to know about your project Featured Articles: Comparison of the proteolysis and occurrence of a range of β-casomorphin peptides in commercial U.S. Cheddar cheeses manufactured from A1/A2 and A2/A2 β-casein milks #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #A2; #β-casomorphin; #casein; #A1; #ripening; #cheese; #whey; #DRMS; #dairysciencedigest; #ReaganBluel
April 15, 2026
The trajectory of the success for a dairy cow begins with mammary development, long before lactation begins. Dr. Benjamin Enger, Associate Professor for The Ohio State University in Wooster, has worked with his team for years to best understand how infection can change the development and if the timing of infection impacts that response. He was specifically interested in Staphylococcus aureus (SA), a common contagious pathogen in dairy farms. To study this, 21 bred heifers at three stages (6.5, 7.5 and 8.5 months) of pregnancy were inoculated, and tissue samples were collected 21 days later to determine the damage done. In this edition, there is much discussion about the physiology of mammary gland development and how different stages of pregnancy impacts progress towards lactation. Understanding the development of the mammary, will likely illuminate the importance of seemingly meniscal management steps. Analyzing your farm’s data could hold the key to eliminating what might be the source of this devastating pathogen. Listen in today to learn more! Topics of discussion 1:40 Introduction of Dr. Ben Enger 3:08 Project set up 3:47 Knowledge gained in projects leading up to this hypothesis6:53 What is mammary epithelial cells (MEC) and stromal cells 10:18 How did Staph Aureus (SA) impact amount of MEC and stromal cells in infected quarters 13:21 Cellular changes in heifers 6.5 vs 8.5 months pregnant 17:00 Cellular differences between the edge tissue vs the center (pic p4)18:40 Duration of impact as the result of SA infection in pregnant heifers 20:54 How does SA get into calves prior to freshening? 22:53 Did you observe immunotolerance in the pregnant heifers? 25:53 What do you want ‘boots on the ground’ dairymen to know about your project 27:26 Experimental increase of milk using blanket therapy to heifers precalving 28:17 Examine first test SCC in first calf heifers27:20 What do you want ‘boots on the ground’ dairymen to know about your project Featured Articles: Impact of Staphylococcus aureus intramammary infection on cellular proliferation and apoptosis on developing mammary glands of pregnant dairy heifers Supporting article:Impact of intramammary infections on mammary gland development in pregnant dairy heifers during late gestation #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #SA; #staphaureus ; #SA; #mammary; #mammarydevelopment; #heifer; #milk; #dairysciencedigest; #ReaganBluel
March 16, 2026
Embryo transfer has become increasingly popular on US dairy farms to rapidly advance the genetic profile of the herd. This month’s feature article looks at the associations between fertility traits on the success of embryo transfer. Fertility traits such as daughter pregnancy rate (DPR), cow conception rate (CCR) and heifer conception rate (HCR) are consistently classified with low heritability. However, this retrospective study takes a deep dive into the data stored at the Council of Dairy Cattle Breeding (CDCB) to use the statistical power of dairy farmers data. There, the researchers were able to find a clear impact of these traits on the success of an ET program and long term impact on herd fertility. Because ultimately … we’re just interested in more calves on the ground, so listen in to better understand how data is improving ET fertility setbacks. Topics of discussion 1:39 Introduction of Dr. Sophia Ortega 2:18 Fertility traits discussion 3:47 How to improve these traits with low heritability 6:25 In vivo (IVD) and in vitro procedures (IVP) definition8:11 Grade 1 embryo improvements when selecting females using fertility traits9:27 Embryo loss discussion 10:30 Difference preg rate between cow vs. heifer 12:03 Global impact of ET improvements using fertility traits 13:45 How ET trends in the dairy industry in the past 5 years 16:02 Limitation of in-vitro procedures and expected preg rate 16:57 Blastocyst rate improvement 19:19 Impact of fertility of ET recipients 21:08 Where to find the fertility traits when selecting 27:20 What do you want ‘boots on the ground’ dairymen to know about your project Featured Articles: Association of fertility traits with embryo development and pregnancy establishment Resources:Dairy Records Management SystemsCouncil of Dairy Cattle Breeding #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #embryo; #ET; #DPR; #CCR; #HCR; #embryotransfer; #CDCB; #DRMS; #dairysciencedigest; #ReaganBluel
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Dairy Science Digest - a podcast developed to share the MOST current research published in the Journal of Dairy science. Hear directly from the research authors on how their results can impact your herd’s profitability. Science you can base your management decisions around.
Designed to rarely exceed 30 minutes, this podcast provides ONLY the ”need to know” info for dairy producers.
Keywords: dairy, science, reproduction, production, extension, cattle, MIZZOU, MU, Dairy Team, #2xAg2030
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