| WHFF Type Harmonisation
Project |
“
The GLOBAL TYPE HARMONISATION PROGRAMME has been one of the most
successful projects of the WORLD HOLSTEIN FRIESIAN FEDERATION,
resulting in the adoption of the recommended type evaluation system
by 95 % of the WHFF members”, according to David Hewitt,
pioneer of the project.
Globally, the world of genetics is getting smaller with increasing
demand for comprehensive high quality information on individual
type characteristics. Type data collected in an internationally
harmonised programme is the key to meeting this requirement, similar
to the international system of collecting milk records to ICAR
approved standards. The alternative, which returns to the situation
of the ‘80’s, is the collection of type traits in an
uncoordinated way, with individual countries collecting and disseminating
data to different requirements, making it impossible to directly
evaluate or compare sires from different countries populations.
Head Classifiers Workshops have been the foundation to the development
of the WHFF Type Harmonisation programme. Removed from the political
meanderings of the industry, this group of influential experts
have a common desire to evaluate animals to a common international
standard. This has achieved an improvement in the quality and quantity
of type information, which has been further enhanced by the introduction
of precise definitions for each linear trait. The quality of the
information collected has enabled the calculation of multiple across
country evaluations (MACE) for type, which are established as the
benchmarks of international sire evaluation.
The workshop also provides the opportunity for emerging counties
to send staff to be trained, in addition to understanding the importance
of monitoring the standard of classifiers’ work. Advice is
given by a number of countries that have sophisticated programs
to ensure classifiers work consistently to a high standard. This
type of methodology is recommended to assist countries to ensure
the standards of the WHFF programme are adhered to.
Head Classifiers Workshops continue to be an essential element
if the WHFF is to retain the momentum of the global type harmonisation
programme, and continue the Holstein’s success worldwide.
| History of Type Harmonisation
or Linear Conformation Scoring |
- At the conference of the European Confederation of Black and
White Breed Societies in 1986 in Bremen, harmonisation of
Type Classification was one of the main topics. As a consequence
it was decided to establish a Working Group to work out recommendations
to the next conference in Brugge in 1987.
- The first WG composed by David Hewitt (UK), Hubertus Diers
(Germany), Frank de Graaf (NL), Arie Hamoen (NL), presented a
first report
in 1987, as expected.
- Since this report induced a great step forward in type scoring
it was decided to involve the global Holstein population in the
project.
- In 1988 WHFF took over the program from the European Confederation
and a new working group was formed. The first Head Classifiers
workshop being organised in Cremona (Italy) in September 1990.
- The WHFF working group was now composed by David Hewitt(UK)Chairman,
Dan Cnossen(US), Dalton Hodgins(Canada), Hubertus Diers(Germany),en
Frank de Graaf(NL)
- The first European Report of 1987 had established 12 linear
standard traits to be mentioned in each report and to be scored
according to standard definitions, namely:
-Stature
-Body depth
-Rump angle
-Rump width
-Rear legs set (side view)
-Feet
-Fore udder
-Rear udder height
-Udder support
-Udder depth
-Teat placement (fore teats)
-Teat length
- Along with these traits the WG described 5 “secondary
traits” as well.
- At the first Workshop in Cremona it was decided to introduce
Rear legs rear view as a trait for investigation and to keep Angularity
and Chest width as secondary traits.
- The second World Classifiers Workshop in Canada in November
1992, was dedicated to the harmonisation of definitions of traits
for scoring.
- During the third WHFF classifiers Workshop in 1994 in Oldenburg
(Germany) Eric Johanssen from Denmark took over from Hubertus Diers.
The aim of the meeting was to prepare a paper for the 9th.World
Holstein Friesian Conference to be held in Japan in 1996.
The paper recommended to consider Angularity and Chest Width as
standard traits along with the 12 other traits, while Rear legs
rear view was accepted as a trait to be investigated.
- The agreement of WHFF at the conference in Japan, in 1996,
brought the number of standard traits to 14.
In the meantime ICAR as well took over the program as basis for
Interbull. It was the start of tremendous progress and improvement
of conformation conversions.
WHFF gave a mandate to the Working
Group to go further with the program and to report again at the
World Holstein Friesian Conference
in 2000 in Sydney(Australia).
At that time the WG was reshaped as follows: Dan Cnossen(US), David
Hewitt(UK) Chairman, Arie Hamoen (NL), Bill Leggat(Australia),
Tom Byers(Canada), Jorge Martinez(Colombia) and Reinhard Reents(Germany).
- The fourth Workshop took place in October 1997 in Madison(US).A
lot of consideration was given to finalise trait definitions. For
feet they chose score the Foot angle.
- The fifth WHFF workshop was held in 1999 in Toledo( Spain).
47 classifiers from 25 countries attended and proved the WHFF initiatives
were interesting.
Rear legs rear view was suggested as 15th.standaard trait, while
Rear teat placement was considered a trait for investigation.
- 2000
At the General Assembly of the WHFF, held on May 03,
2000 in Sydney in Australia, the members have been informed on
the activities of the Federation.
During session 9 of the 10th World Congress (Sydney-2000) the
chairman of the Type Classification Working Group, David Hewitt,
presented a paper on the 5th Workshop held in Toledo (Spain)
in May ’99.
The WHFF Council and the General Assembly as well approved
the report, the conclusions formulated by the WG could then
be implemented by the WHFF members.
The recommendations were as follows:
- new standard trait Rear Legs Rear View
- new definition of Angularity
- research trait Rear Teat Position
David Hewitt resigned as WG-Chairman. The Council elected Dan
Cnossen as his successor..
-
2001
The next workshop was originally scheduled for 2001 in
Canada but with the outbreak of FMD in Europe and Latin
America it
was postponed indefinitely. On October 8 and 9 the members
of the working group met in Hatley, Wisconsin and decided
to postpone the World Classifier Workshop until April 2003
in
Quebec, Canada.
The WG made recommendations to the WHFF Council at it’s
October 2002 meeting.
-
2002
The 11th WHFF Council meeting held in Madison, USA on 7 & 8
October.
WHFF-council approved the report of the WG-meeting Madison
2001. The recommendations were as follows:
-Council confirmed that Body Depth be measured independently
of the stature of a cow;
-that the new trait Rear Teats Rear View be added as
the sixteenth (16th) standard trait to be collected by
all countries supplying
genetic information to Interbull;
-that on the linear scale of 1 – 9 a teat placed on the
midpoint of the rear quarter be given the measurement of 4
(on 1 – 50 scale, 20 should be given). Crossed rear
teats will be a 9 or 50, those touching at the base will
be given
an 8 or 40;
After one year of data collection(RTRV) by Interbull
the definition should be reviewed.
-It was noted that a new standard trait must be approved
by the General Assembly. The Council, however, recommended
that the trait RTRV be used in the meantime.
-that a manual of pictorial examples showing the extremes
and mean of standard linear traits, along with the official
definition of each trait be put on the WHFF website by January
2003 after changes have been made.
-that the linear traits and definitions be translated into
Spanish, German and French.
-
Short Results 6th World Classifiers Workshop, April 2003
Quebec (Canada)
The Council was given the recommendations on the following
topics:
1) Only standard linear traits should be suitable for conversion.
2) Locomotion: members should measure the trait and gather
information to examine further harmonisation possibilities.
3) Rear Udder Width: countries that already measure this trait
should supply information for further harmonisation.
4) General characteristics: all countries should use four basic
general characteristics, namely:
a) Dairy character
b) Frame and Capacity
c) Feet and Legs
d) Udder
- Next Head Classifiers Workshop will be in 2005 in The
Netherlands.
The WHFF General Assembly, in Paris in 2004, agreed upon the following:
1. The 2 new traits introduced in 2000 have been adopted, namely:
Rear Legs Rear View and Rear Teat Rear View.
2. Four recommendations have been adopted, namely:
R1. Members should use type definitions as published on the
WHFF-website
R2. WG to look after locomotion to include in harmonised classification
R3. Members to use at least 4 General Characteristics:
Udder, Feet and Legs, Frame and Capacity, Dairy Character.
R4. WG to look after Rear Udder Width for further harmonisation.
Conclusions
-The first workshop was attended by participants from 14 countries.
The 6th workshop in Quebec had classifiers from 27 countries.
That is exactly how many members WHFF had in 2002!
-Correlations between countries have improved greatly.
Average genetic correlations between 8 main holstein countries( CAN,DEU,DNK,FRA,GBR,ITA,NLD,USA)
was in February. 2003:
- 6 linear udder traits 0.92
- 3 linear F&L traits 0.83
- 6 body traits 0.89
- all linear traits 0.90
( milk 0.92, fat 0.91 and protein 0.91) A.Hamoen
| International Type
Evaluation of dairy cattle |
International
type evaluation of dairy cattle - june 2005
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