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Australian Sheep Breeding Value Definitions
LIVEWEIGHT TRAITS
Weight (kg) WT
| Estimates the genetic difference between animals in liveweight. |
| Birth: |
BWT estimates the genetic difference between animals in liveweight at birth. |
| Weaning: |
WWT estimates the genetic difference between animals in liveweight at 100 days of age. |
Post Weaning:
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PWT estimates the genetic difference between animals in liveweight at 225 days of age. |
Yearling:
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YWT estimates the genetic difference between animals in liveweight at 360 days of age. |
Hogget
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HWT estimates the genetic difference between animals in liveweight at 450 days of age. |
Adult:
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AWT estimates the genetic difference between animals in liveweight at 540 days of age. |
Maternal Weaning Weight (kg) MWWT
MWWT ASBVs are an estimate of the ewe's potential for milk production and ability to provide a better maternal environment. They are expressed as kilograms of liveweight at 100 days of age (weaning).
CARCASE TRAITS
Fat Depth (mm) FAT
| Estimates the genetic difference between animals in fat depth at the GR site. |
| Post Weaning: |
PFAT estimates the genetic difference in GR fat depth at 45kg liveweight |
| Yearling: |
YFAT estimates the genetic difference in GR fat depth at 60kg liveweight. |
| Hogget: |
HFAT estimates the genetic difference in GR fat depth at 70kg liveweight. |
Eye Muscle Depth (mm) EMD
| Estimates the genetic difference between animals in eye muscle depth at the C site. |
Post Weaning:
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PEMD estimates the genetic difference in EMD at the C site at 45kg liveweight. |
Yearling:
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YEMD estimates the genetic difference in EMD at the C site at 60kg liveweight. |
Hogget:
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HEMD estimates the genetic difference in EMD at the C site at 70kg liveweight. |
REPRODUCTION TRAITS
Number of Lambs Born (%) NLB
Estimates the genetic difference between animals for number of lambs born at each lambing opportunity.
Number of Lambs Weaned (%) NLW
Estimates the genetic difference between animals for number of lambs weaned at each lambing opportunity.
Scrotal Circumference (cm) SC
| Estimates the genetic difference between animals for scrotal circumference. |
Post Weaning:
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PSC estimates the genetic difference for scrotal circumference at 225 days of age. |
Yearling:
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YSC estimates the genetic difference for scrotal circumference at 360 days of age. |
Hogget:
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HSC estimates the genetic difference for scrotal circumference at 450 days of age. |
WOOL TRAITS
Fleece Weight (%) FW
Estimates the genetic difference between animals for greasy (G) or clean (C) fleece weight.
Note: Both greasy and clean fleece weight are expressed in percentage terms. |
Yearling:
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YGFW or YCFW estimate the genetic difference in fleece weight at 360 days of age. |
Hogget:
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HGFW or HCFW estimate the genetic difference in fleece weight at 450 days of age. |
Adult:
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AGFW or ACFW estimates the genetic difference in fleece weight at 540 days of age. |
Fibre Diameter (micron) FD
| Estimates the genetic difference between animals for fibre diameter. |
| Yearling: |
YFD estimates the genetic difference in fibre diameter at 360 days of age. |
| Hogget: |
HFD estimates the genetic difference in fibre diameter at 450 days of age. |
| Adult: |
AFD estimates the genetic difference in fibre diameter at 540 days of age. |
Fibre Diameter Coefficient of Variation (%) FDCV
| Estimates the genetic difference between animals for fibre diameter coefficient of variation. |
Yearling:
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YFDCV estimates the genetic difference in fibre diameter coefficient of variation at 360 days of age. |
Hogget:
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HFDCV estimates the genetic difference in fibre diameter coefficient of variation at 450 days of age. |
Adult:
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AFDCV estimates the genetic difference in fibre diameter coefficient of variation at 540 days of age. |
Staple Strength (N/Kt) SS
| Estimates the genetic difference between animals for staple strength. |
| Yearling: |
YSS estimates the genetic difference in staple strength at 360 days of age. |
| Hogget: |
HSS estimates the genetic difference in staple strength at 450 days of age. |
| Adult: |
ASS estimates the genetic difference in staple strength at 540 days of age. |
Staple Length (mm) SL
| Estimates the genetic difference between animals for staple strength. |
| Yearling: |
YSL estimates the genetic difference in staple length at 360 days of age. |
| Hogget: |
HSL estimates the genetic difference in staple length at 450 days of age. |
| Adult: |
ASL estimates the genetic difference in staple length at 540 days of age. |
Curvature (degrees per mm) CURV
| Estimates the genetic difference between animals for staple length. |
| Yearling: |
YCURV estimates the genetic difference in curvature at 360 days of age. |
| Hogget: |
HCURV estimates the genetic difference in curvature at 450 days of age. |
| Adult: |
ACURV estimates the genetic difference in curvature at 540 days of age. |
WORM RESISTANCE
Worm Egg Count (%) WEC
| The WEC ASBV describes the value of an animal's genes for carrying worm burdens - a combination of being genetically less likely to pick up worms and being able to cope immunologically with the worm burden. WEC ASBVs are expressed as a percentage relative to a count of 500 eggs per gram. |
| Weaning: |
WWEC estimates the genetic difference in worm burden at 100 days of age. |
| Post Weaning: |
PWEC estimates the genetic difference in worm burden at 225 days of age |
| Yearling: |
YWEC estimates the genetic difference in worm burden at 360 days of age. |
To view sire listings go to: http://www.sheepgenetics.org.au/Home
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