MERINO
BLOODLINES: The
Comparisons: 19891999 K.A.
Coelli, K.D. Atkins, A.E. Casey and S.J. Semple Orange
Agricultural Institute, NSW Agriculture, Orange The
performance differences between many commonly used Merino bloodlines can
now be defined. This is the
result of the Merino Breeding Group's updated analysis of 68 wether trials
conducted in NSW, SA, WA, Tasmania, Victoria and Queensland during the 10
years from 1989 to 1999. Market influence Three
market periods have been evaluated  ·
Low (9 per cent) micron premium (MP), ·
Moderate (11 per cent) micron premium,
and ·
High (13 per cent) micron premium. This range of markets has been presented to assist breeders who are considering a range of breeding objectives. There is a major change in the gross margin value of bloodlines in the different market types demonstrated in Figures 4, 5 and 6. It is critical to have a clear understanding of the market type you feel describes the future wool market  and its influence on your breeding objective  before bloodline selection is undertaken. Figures 4, 5 and 6 demonstrate the relationship between gross margin values, clean fleece weight and fibre diameter. A contour line on a graph joins points of equal gross margin value. Three gross margin per DSE lines are shown on each graph. They are: ·
20 % above average, ·
Average, ·
20
% below average. Bloodlines
that are on or close to one of the three lines have a similar gross margin
per DSE. Figure 4 shows the gross margin contours for the moderate micron premium (11 % MP) 1995 to 1999 markets as described in Table 1 and Figure 3. Within
the last five years there have been shortterm periods of low and high
micron premium wool markets. The
contour lines on Figures 5 and 6 demonstrate the effect of these low and
high micron premium market types on the gross margin value of bloodlines. Figure 5 contour lines describe the low micron premium (9 % MP) in the 1995 selling season values. In this market type fleece weight has a more dominant influence on bloodline gross margin value. All heavy cutting Fine to Medium Wool bloodlines have a high gross margin, as shown by the +20 % gross margin contour. As broad wool bloodlines do not have a heavier fleece weight compared to some heavy cutting medium wool bloodlines their gross margin performance is only average to below average. Figure 6
contour lines describe the high micron premium (13 % MP) during the 1999
selling season. In this
market type fibre diameter has a dominant influence on a bloodline's gross
margin value. The fine wool bloodlines have an extremely high gross margin
despite their relatively low fleece weight.
Bloodlines with above average fibre diameter do not have a
competitive gross margin value. While
the three market types in Figure 4, 5 and 6 can generally be described as
low, moderate and high micron premium markets, each of the market periods
have a range in premiums across the micron categories. Figure 7
graphs the micron premiums for the micron categories in each of the market
types in Figures 4, 5 and 6. The largest difference between the market
types was apparent in the 20 and 21 micron premiums, and to a lesser
extent for the 22 micron premium. The 23 and 24 micron premiums were low
in all market types. Variation in micron premium within a market type
results in curved contour lines. Further Information To
make the best use of this information, producers should consider the
details on the inside cover of the Bloodline Performance folder and Agnote
DAI/54 Choosing A Bloodline Source. If you require further information, contact the Merino Breeding Group, Orange  phone: 02 6391 3812, fax: 02 6391 3922
Micron
Premium Micron premium is a measure of the wool
market's relative value of fleece weight and fibre diameter. Micron premium is the percentage
increase in price/kg for wool one micron finer.
For example, the 21 micron premium is the value of 20 micron
relative to 21 micron. Calculating micron premium is
simple and straightforward. Firstly
obtain the two wool market values for the micron you are considering.
They may be micron indicators (commonly used for general
distribution) or prices for a wool type relevant to a particular
situation. They could be
spot values or average values calculated over a longer period that
reduces shortterm fluctuations. They
could be values you think will be relevant in the future. The example below sets out how to
do the calculation. Example: Micron premium for 21
micron wool Step 1.
Obtain the values of the micron you want to calculate and for one
micron finer For example:
 21 micron value = 500 cents per
kg
 20 micron value = 550 cents per
kg Step 2.
Calculate the value of fleece weight  that is, the value of 1kg
of wool of the micron you want to calculate
 the value of a kg of 21 micron wool
= 500 cents per kg Step 3.
Calculate the value of fibre diameter
 the difference between the value of the micron you want to
calculate and the value of one micron finer
 that is the difference between
21 micron & 20 micron
= 50 cents/kg Step 4.
Calculate the relative value of fleece weight and fibre diameter
 the value of fibre diameter divided by the value of fleece weight
and expressed as a percentage (%)
50 x 100 =
10% MP
500

© MIRANI 2007