+ Dairy Sheep) Proposition to Update Guidelines in Goats (+ Dairy Sheep)
Total Page：16
File Type：pdf, Size：1020Kb
Joint meeting of the ICAR Working Groups on Performance Recording of Dairy Sheep & Goat Milk Recording Puerto Varas, Chile, 25th October 2016 Agenda . 1-Opening and welcome . 2-New organization of Sheep, Goat and Fiber WG : the Sheep, Goat & Small Camelid working group . 3-Proposition of evolution on the goat guidelines : introduction of Liu method . 4-Presentation of the results of the on-line enquiry . 5-Addition to the agenda . 6-Date of next meeting . 7-Closure Agenda 1 Opening and welcome 15:50 – 17:10 B. CENTER Room Initially joint meeting of working group on dairy sheep and goats Apologies from Zdravko Barać, co-chairman of the meeting, who could not attend Also first meeting of new Sheep, Goat and Small Camelid WG (see 2nd point of the agenda) Agenda 2 New organization of the Sheep, Goats and Fiber fields in ICAR ICAR has been seeking to expand its role for Sheep and Goats to include meat, reproduction and maternal traits. Formation of a Working Group that encompasses the interest of Sheep, Goat and Small Camelid. The ICAR Board at its meeting on 19th July 2016 approved the Terms of Reference for the SGC-WG to replace the three existing groups SGC-WG : terms of reference Considerations To date, the focus of ICAR activities for sheep & goats has mainly been on milk recording and the existing WG work closely together (joint meetings) Animal fiber WG covers small ruminants species (sheep, goats) and a range of small camelids including alpacas, llamas and vicunas. There is a demand and need for ICAR’s guidelines to be extended to include meat and wool production especially from sheep. Production systems | farming environments for sheep, goats, small camelids are diverse but with similarities between countries Systems | technologies for identification and performance recording of sheep, goats, small camelids are similar SGC-WG : terms of reference Considerations Sheep, goats and small camelids products : important contribution to world agriculture production especially in harsh environment. Significant administrative overhead for each WG. Consolidating WG => reduce overhead + better outputs. Philosophy accuracy task force : link accuracy of performance recording to the benefit generated by using the resulting information in a range of decisions. New organization of the Sheep, Goats and Fiber working group 3 WG 1 WG 3 expert Advisory Groups Performance Sheep & Goat Recording of Milk Recording Dairy Sheep WG EAG Goat Sheep, Goat & Sheep, Goat & Performance Small Camelid Small Camelid Fiber Recording WG WG Recording EAG Sheep & Goat Animal Fiber Meat, Reproduction WG and Maternal Traits Recording EAG SGC-WG : terms of reference Objectives of the SGC-WG Provide a forum for members of ICAR to collaborate, exchange and learn on performance recording and genetic evaluation for sheep, goats & small camelid (SGC). Maintain, update, promote, extend guidelines for SGC performance recording for the full range of traits relevant to decisions on : genetic improvement, farm management, quality assurance, animal health and welfare. Conduct and report results of periodic international surveys on SGC performance recording and genetic evaluation SGC-WG : terms of reference Objectives of the SGC-WG Develop and support services relevant to SGC that service ICAR will provide to members of ICAR on a user-pays basis. Facilitate and co-ordinate international collaboration in research and development on SGC performance recording & genetic evaluation SGC-WG : terms of reference Governance . SGC-WG will comprise persons covering : All geographical regions Technical expertise in : (i) milk, meat, fiber, reproduction & functional trait recording of SGC ; (ii) genetic improvement of SGC ; (iii) farm management, quality assurance, health & welfare in SGC . Initial composition : SGC-WG itself chairperson of the WG & chairperson of each EAG EAG Sheep and Goat Milk Recording current membership of current Dairy Sheep WG and Goat WG EAG Sheep, Goat & small Camelid Fiber Recording current membership of current Animal Fiber WG EAG Sheep & Goat Meat, Reproduction & Maternal Trait Recording : formed primarily from interest of countries with major sheep meat sectors SGC-WG : members X from south X from EAG Milk Africa EAG Meat France Sharon Jo X from J.M. McIntyre Connington Serradilla Spain/Italy Zdravko X from X from Barać xxx Ireland Australia Silverio Eva Grande Ugarte J.M. Astruc Drago Antonello Marco Kompan -> Carta Antonini Mojca Simčič or A. Cividini EAG Fiber Alessia SGC-WG Tondo Hugh Zheng F.J. Romberg -> Galbraith Wenxin Pera Herold Susan Jilin Tellez Wenguang Claudio Louyujie Zhang Tonin R. J.P. David Oscar Marquina- Gutierrez Barboza Toro Bernedo SGC-WG : terms of reference Priorities . To be established by the Committee taking into account of its ToR and any request from the ICAR Board . Priorities in the next 5 years include : Develop guidelines for the sheep and goat meat performance recording Develop guidelines for the sheep and goat reproduction and maternal trait performance recording Maintain and develop the ICAR guidelines for milk recording of sheep and goats Maintain and develop the ICAR guidelines for fiber production form sheep, goats and small camelid Genomics ? Agenda 3 Proposition to update guidelines in goats (+ dairy sheep) Proposition to update guidelines in goats (+ dairy sheep) Krakow, 2015 : presentation by Agnès Piacère of method Liu adopted in France to estimate daily yield and content from a one-milking record Background & objectives : . Decreasing the constraints . New recording schemes more flexible, more simple, less expensive . Avoid the need of alternating time of record (problem of AT) . → correction by Liu method OK, better than AT for daily yields/contents, as precise as AT for genetic evaluation . And after : simplify the rules on recording intervals Remind existing protocols in the current guidelines in goats & dairy sheep Official / First letter Second letter non official or number Official A | B | C | E 4 | 5 | 6 | T | C Non official D A4 = reference method A = official tester | B = farmer | C = official tester or farmer E = flexible official method where rules of not recording suckling ewes may not be respected | rules of recording all animals may not be respected D = simplified, based on 2-4 visits/flock. No lactation, no EBVs T = alternate monthly C = corrected monthly Proposition to update guidelines in goats (+ dairy sheep) French proposition : Existing methods : T : when AT method is set up, there is no obligation to correct daily yield (except multiplying by 2) and content in order to calculate MY, FY and PY for the whole lactation. Nevertheless, correction is possible. DIFFERENT FROM CATTLE GUIDELINES THAT OBLIGES CORRECTION FOR T METHOD. C : recording and sampling occur at any milking at each recording visit. This schemes implies to use a correction method among those described to estimate the daily production. DIFFERENT FROM CATTLE GUIDELINES THAT OBLIGES TO RECORD THE SAME MILKING (C for CONSTANT instead of C for CORRECTED). Proposition to update guidelines in goats (+ dairy sheep) French proposition : New methods : Z : alternate scheme, with milk yield from the two daily milking and only one-milking sampling alternately the morning and the evening on the next recording visit. As the alternate scheme is realized, there is no obligation to correct daily contents in order to calculate fat yield and protein yield for the whole lactation. Y : milk yield from the two daily milking and only one-milking sampling that occur at any milking at each recording visit; this scheme implies to use a correction method among those described to estimate the daily fat and protein contents. Proposition to update guidelines in goats (+ dairy sheep) French proposition : Correction method : o Different correction methods may be listed in the guidelines (ex. Liu method). o It is up to the ICAR member to describe precisely the correction method in its own situation (ex. France explains as it is below). [ijkl] [ijk] [ijk] [ijk] [ijkl] Separate regressions for combinations of : yDay = b0 + b1 yTest + e Trait Nb of Class definition classes Parity 2 1st lactation, 2nd and later lactations Lactation stage (in months) 10 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 + Milking interval 5 AM: ≤ 12.5h long; 12.5h to 13h ; 13h-13.5h; 13.5h-14h; ≥14h long (time duration) 5 PM: ≥ 11.5h long; 11h-11.5h; 10.5h-11h; 10h-10.5h; ≤10h long Proposition to update guidelines in goats (+ dairy sheep) French proposition : Frequency and number of milk recording visits : o Add the interval of 7 weeks for the reference method o Add the different intervals as well for method T, C, Z, Y (from 4 to 7) CAUTION : in sheep & goat current guidelines, it is set that for methods with 1 milking tested, the interval must be 4 weeks. TO DECIDE. Philosophy for sheep : short lactation (150-180 days) => when 1 milking tested, the loss of precision must no be increased by increasing interval. Philosophy for goats : ? Longer lactations … might be accepted. Proposition to update guidelines in goats (+ dairy sheep) French proposition : Lower and upper bound in intervals between visits : In section 2.2 (sheep) and 2.3 (goats), the intervals are defined by an average recording interval, without any lower not upper bound. It is OK = it must be possible to tighten the intervals (example : for experimental reasons). ≠ in section 2.1 and especially 2.1.2 (ICAR standards for recording intervals) where there are lower and upper bounds. Proposition to update guidelines in goats (+ dairy sheep) French proposition : Tolerance regarding the interval between lambing/kidding and first test-day and between 2 consecutive test-days o It is up to each country/breed/breed society to describe the tolerance accepted in its situation about : • Interval between lambing/kidding and first test-day • Interval between 2 consecutive test-days Last test-day involved in the lactation calculation o It is up to each country/breed/breed society to describe how the lactation is calculated and in particular which is the last test-day taken into account.