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Ginjo MarbleMax Hiranami B901

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Background

B901 is the most important original selection our own production. The target was a dramatic increase in FB feeder weaning weights and early growth, following an economically disastrous period of experimentation with high Tajima feeders.   The target increases were essential to reduce feeding costs and time to induction. In addition, we were looking for a new generation of FB breeders with enhanced maternal capabilities. And to make this work over the longer term, we needed to retain high marbling capability.

B901 currently boasts over 550 registered calves in 14 recorded herds, with significant international representation. He has also been used extensively in F1 production. At the 2012 AWA Conference, a FB progeny carcass was nominated as best from an Australian sire for fineness of marbling; and early in the stages of the AWA carcass research program, B901 was identified at a high rank as outperforming his sire, Hirashigetayasu, probably the most popular and famous international sire of Tottori/Kedaka descent.

Prefectural strain analysis for B901 is Hyogo/Tajima 44%, Tottori/Kedaka 25%, Itozakura 19%, Okayama 12%

Growth

The standout factor in the original selection of B901 was early growth, which was beyond what we had hoped for in immediately reducing our cost of production for high quality FB feeders to be shipped to AACo Aronui.   The sire delivered both in young weaner growout and mature feeder progeny performance, with common sense variation by dam genetics.   The following table is a raw data sample from B901’s own growout. We would still love him today.

Ginjo MarbleMax™ Hiranami B901 Raw Data Sample

Days of Age 179 228 434
Live weight (kg) 212 294 438

Marbling

The average B901 progeny carcass Aus-Meat MS is 7~8, with many MS9 and very few ‘fails’. Obviously, the key to optimisation is correct joining, and the sire is versatile here also. High, superfine marbling is generally achieved with matings to small high Tajima females, with resulting 350~400kg carcasses.   Much more profitable carcasses ~500kg with high marbling are achieved with high Itozakura joinings – females of TF147/TF151 descent are ideal.

The Package

An ideal AI sire for commencing a move away from high Hyogo/Tajima bloodlines in FB commercial production, or any higher Wagyu content breeding scenario.   B901 should deliver both more profitable feeders and a new generation of more capable breeders, which then provide a platform for a further round of enhancement with sires like L9 for another frame increment, or J828 for a more subtle frame + MS increment.   B901 semen is now in limited supply.

 

Name/ID Gestation
Length
(days)
Birth
Wt
(kg)
200
Day
Wt
(kg)
400
Day
Wt
(kg)
600
Day
Wt
(kg)
Mat
Cow
Wt
(kg)
Milk
(kg)
Scrotal
Size
(cm)
Carcase
Wt
(kg)
Eye
Muscle
Area
(sq cm)
Rib
Fat
(mm)
Rump
Fat
(mm)
Retail
Beef
Yield
(%)
Marble
Score
Marble
Fineness
(%)
GINJO MARBLEMAX HIRANAMI B901 (AI) (ET) +3.4
84%
+3.8
97%
+20
96%
+31
96%
+39
94%
+43
81%
+4
84%
+0.9
56%
+29
89%
-0.4
83%
+0.9
79%
+0.1
83%
+0.2
73%
+0.2
82%
+0.10
66%
Breed Avg. EBVs for 2016 Born Calves +0.1 +0.9 +10 +15 +19 +19 +1 +0.0 +12 +0.7 +0.2 +0.3 -0.1 +0.4 +0.13

GINFB0901: AWA BREEDPLAN EBV summary. Downloaded 19 Feb 2018

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