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SPECIAL 2015 JAM COVERAGE
Welcome to JAM 2015
Welcome to our expanded coverage of the 2015 Joint Annual Meeting of the American Dairy Science Association® (ADSA®) and the American Society of Animal Science (ASAS).
Whether you are in Orlando as one of more than 3,000 participants at the meeting, or if you were unable to attend this year's meeting, we hope you will find this additional coverage valuable.
We appreciate the assistance of the Graduate Student Division who will be helping with the reporting for our daily editions. We will also be using social media at the meeting. If you are on Twitter, watch for #JAM2015 for tweets from the JAM. We also have a You Tube channel "ADSANews" where you will find video clips from activities at the JAM.
We welcome your feedback on the coverage and hope you enjoy our special JAM 2015 coverage. For more information on JAM, visit http://www.jtmtg.org/JAM/2015/
LCA looks at nutritional, environmental health impacts of milk
While considerable effort has been put toward understanding the environmental impact of a food or diet, nutritional effects are not usually considered in food-related life cycle assessment (LCA). To address this, researcher Katerian Stylianou of the University of Michigan and colleagues have developed a novel Combined Nutritional and Environmental Life Cycle Assessment (CONE-LCA) framework that evaluates and compares in a parallel manner environmental and nutritional effects of food items or diets expressed in disability-adjusted life years (DALYs).
They have applied this framework in a proof-of-concept case study to investigate the environmental and nutritional human health effects associated with the addition of one serving of fluid milk to the present American adult diet. They also investigated two replacement scenarios where a serving of fluid milk was substituted for an isocaloric portion of the average diet and sugar-sweetened beverages (SSB). Epidemiologically based nutritional impacts and benefits linked to milk intake were compared with several environmental impacts considered in LCA (global warming and particulate matter), carried to a human health endpoint.
Heat stress effect on mammary gland autoplay in dry period examined
Heat stress during the dry period is known to compromise udder growth, thus negatively affecting milk yield in subsequent lactations. Cooling during the late dry period, when mammary tissue proliferates, is a common management practice. However, it neglects udder involution (or return to a pre-lactation state) during the early dry period, a process that is accomplished by both apoptosis and autophagy (self-destruction of damaged cells). Yenny Ramirez-Lee reported on work at the University of Florida that was designed to evaluate the effect of heat stress on mammary gland autophagy during the early dry period.
Holstein cows were dried off 45 days before expected calving and randomly assigned to one of two treatments: heat stress (HT) or cooling (CL). All cows were housed in the same barn during the dry period, but only the stall area for CL cows was equipped with soakers and fans.
The work confirmed that both groups of cows were exposed to significant heat stress. However, the cooling system effectively alleviated heat stress in cooled cows by decreasing the rectal temperature and respiration rate. Their data suggests that cows undergoing chronic heat stress throughout the entire dry period (1) lack the autophagic activity in the early dry period needed for mammary gland involution, and (2) lack a subsequent attenuation of autophagy, which may hinder mammary gland growth during the late dry period and thus limit future production.
Research looks at PEDv survivability, infectivity in lagoons
Since 2013, porcine epidemic diarrhea virus (PEDv) has threatened the North American swine industry, and despite the industry's best efforts, not much is known about its survivability and infectivity within open lagoons over time.
In an attempt to find some answers in regard to survivability and infectivity, researchers Hein M. Tun of the University of Manitoba; John P. Carney of the Manitoba Livestock Manure Management Initiative; Mark Fynn of the Manitoba Pork Council; Lorne Grieger of the Prairie Agricultural Machinery Institute, and Ehsan of the University of Manitoba, turned to two PEDv positive farms in Manitoba. The first was infected 20 weeks before the study, and the second was identified during the initial farm study.
Lagoon samples were collected over a seven week period during fall 2014 where active viral shedding was (lagoon 2) or was not present (lagoon 1). Lagoon sampling was conducted using a grid layout of 12 sites at three depths in lagoon 1, and 16 sites at two depths in lagoon 2.
Genomic technologies explored in selection
of novel phenotypes in dairy crossbreeding programs
Genomic selection in dairy cattle has been successfully applied for milk production traits in many countries around the world. This has been enabled through the routine collection of phenotypes over several years and the large body of animals that have been genotyped. The application of genomics for non-routinely collected phenotypes has been less successful due to the cost of phenotyping and the smaller number of animals available for genotyping.
Richard J. Spelman of the Livestock Improvement Corporation of Hamilton, New Zealand, reported on genomic estimates for Johne's susceptibility and residual feed intake that have been recently been commercialized in the New Zealand dairy population. Johne's susceptibility has been estimated in a case control experimental setting. Over 1,500 animals that have been identified to be affected by Johne's have been genotyped and compared with a control derived from the general population of animals that have been genotyped in the LIC genomic selection data set. The accuracy of evaluation for Johne's susceptibility is approximately 30% with a heritability of 18%. Residual feed intake was measured over 2000 growing Holstein-Friesian heifers in New Zealand and Australia, which were phenotyped over 42 days for feed intake and live weight gain. Genomic estimates for residual feed intake have a reliability of 10%.
S-PAC Interest Group meets today
Join ustoday from 8:00 to 9:00 am in Suwannee 17 for the S-PAC Interest Group.
Whether you are an experienced user or just learned that you have a free 90 day trial subscription to S-PAC and wonder what it is, join us to learn more about what is available in S-PAC and discuss how it is being used in the field and in the classroom. For experienced users come and share how you are using it and your ideas on how we can make it even better.
FASS - Science Policy
Have questions or want to learn more about what is happening in Congress on science policy, research priorities and funding or other issues? Lowell Randel and Walt Smith, FASS Science Policy Directors, will be in the FASS booth (#510, Gatlin Ballroom) on Monday morning from 8:00 to 10:00 am to share their insights. The 2014-2015 FASS Congressional Science Fellow, Cassie Welch, will be in the FASS booth on Monday from 2:00 to 4:00 pm.
Schedule for Monday, July 13, 2015
|Morning (3 hours)||Afternoon (3 hours)|
|Poster Session (Authors present 7:30-9:30)|| |
|Bioethics Symposium: Effects of science, government, and the public in directing the future of animal agriculture||ADSA Foundation PhD Symposium: Meeting the present and future demand for employees with a PhD|
|Breeding and Genetics Symposium: Relevance of modeling in the genomics era||ADSA Multidisciplinary and International Leadership Keynote (MILK) Symposium: Global dairy perspective-Production, processing, people, politics, and priorities|
|Comparative Physiology of Lower Gut and Nonruminant Nutrition Symposium:|
The gut-brain axis-Sensing and signaling
|Extension Education Symposium: Extension and industry outreach for tomorrow's producers||ADSA Southern Section Symposium: Maximizing forage quality in the Southeast|
|Lactation Biology Symposium: Mammary gland biology revisited||Animal Behavior and Well-Being Symposium: Novel and multidisciplinary approaches to animal welfare|
|ADSA-SAD (Student Affiliate Division) Undergraduate Competition: Dairy Foods||Animal Health Symposium: Understanding and reducing the impact of various stressors on immune responses and health of cattle|
|Animal Health: Reproductive Health & Acute Immune Responses||Bovine tuberculosis (TB) and paratuberculosis (Johne's disease) Symposium-What we know and what we need to know|
|Forages and Pastures: Forages for Livestock Systems||EAAP Genetics Symposium: Breeding for environmental sustainability|
|Graduate Student Competition: ADSA Dairy Foods Graduate Student Oral Competition||Physiology and Endocrinology Symposium: Progesterone as an endocrine regulator of fertility in cattle|
|Graduate Student Competition: ADSA Production Division Graduate Student Oral Competition, MS||Ruminant Nutrition Symposium: Time required for diet adaptation and minimization of carry-over effect in ruminants: Evidence-based decisions|
|Graduate Student Competition: ADSA Southern Section Graduate Student Oral Competition||ADSA-SAD (Student Affiliate Division) Undergraduate Competition: Dairy Production|
|Meat Science and Muscle Biology||ADSA-SAD (Student Affiliate Division) Undergraduate Competition: Original Research|
|Nonruminant Nutrition: Enzymes & Processing||Animal Health: Swine Health & Transition Cows|
|Physiology and Endocrinology: Reproduction and estrous synchronization||Forages and Pastures: Grasses and Silages|
|Production, Management, and the Environment I||Graduate Student Competition: ADSA Production Division Graduate Student Oral Competition, PhD|
|Ruminant Nutrition: Dairy Calves||Graduate Student Competition: ADSA-ASAS Northeast Section Graduate Student Oral Competition|
|Ruminant Nutrition: Dairy Rumen Fermentation||Horse Species-1: General session|
|Small Ruminant: Nutrition||Lactation Biology I|
|Swine Species||Nonruminant Nutrition: Amino Acids & Minerals|
| ||Physiology and Endocrinology: Nutrition, reproduction and metabolism|
| ||Ruminant Nutrition: General|
Thanks to our Corporate Sustaining members for their ongoing support of ADSA and the Journal of Dairy Science®.
Arm & Hammer Animal Nutrition
Adisseo North America
Elanco Animal Health
Pfizer Animal Health
Varied Industries Corp.
SoyPLUS / SoyChlor
Diamond V Mills Inc
Grande Cheese Co.
Danisco USA Inc
Land O'Lakes Inc
GEA Farm Technologies (Westfalia/Surge)
Prince Agri Products
Ag Processing Inc.
Darling International Research
Performance Products, Inc.
Zook Nutrition & Management
Swedish Univ. of Agri. Sciences
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