Wether Trial Results
Coelli, K.D. Atkins, A.E. Casey and S.J. Semple
Agricultural Institute, NSW Agriculture, Orange
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 periods have been evaluated -
Low (9 per cent) micron premium (MP),
Moderate (11 per cent) micron premium,
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,
% below average.
that are on or close to one of the three lines have a similar gross margin
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.
the last five years there have been short-term 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.
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.
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.
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.
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
© MIRANI 2007