|
Australian Sheep Breeding Value Definitions
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: PWT estimates the genetic difference between animals in liveweight at 225
days of age.
Yearling: YWT estimates the genetic difference between animals in
liveweight at 360 days of age.
Hogget: HWT estimates the genetic difference between animals in
liveweight at 450 days of age.
Adult: AWT estimates the genetic difference between animals in
liveweight at 540 days of age.
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).
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.
Estimates
the genetic difference between animals in eye muscle depth at the C site.
Post
Weaning: PEMD estimates the genetic difference in EMD at the C site at 45kg
liveweight.
Yearling: YEMD estimates the genetic
difference in EMD at the C site at 60kg liveweight.
Hogget: HEMD estimates the genetic
difference in EMD at the C site at 70kg liveweight.
Estimates
the genetic difference between animals for number of lambs born at each lambing
opportunity.
Estimates
the genetic difference between animals for number of lambs weaned at each
lambing opportunity.
Estimates
the genetic difference between animals for scrotal circumference.
Post Weaning: PSC estimates the genetic difference for
scrotal circumference at 225 days of age.
Yearling: YSC estimates the genetic
difference for scrotal circumference at 360 days of age.
Hogget: HSC estimates the genetic
difference for scrotal circumference at 450 days of age.
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: YGFW or YCFW estimate the genetic difference in fleece weight at 360
days of age.
Hogget: HGFW or HCFW estimate the genetic difference in fleece weight at 450
days of age.
Adult: AGFW or ACFW estimates the genetic difference in fleece weight at
540 days of age.
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.
Estimates
the genetic difference between animals for fibre diameter coefficient of
variation.
Yearling: YFDCV estimates the genetic difference in fibre diameter
coefficient of variation at 360 days of age.
Hogget: HFDCV estimates the genetic difference in fibre diameter
coefficient of variation at 450 days of age.
Adult: AFDCV estimates the genetic difference in fibre diameter
coefficient of variation at 540 days of age.
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.
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.
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 Egg Count (%) WEC
The
WEC ASBV describes the value of an animals 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.
Hogget HWEC
estimates the genetic difference in worm burden at 450 days of age.