Veterano’s solo reign ends today. Saturn RDC ties at 164 RZG with +0.88% fat. Germany’s new genomic era starts now.

Executive Summary: Germany’s December 2025 evaluations shook up both Holstein leaderboards with new names at the top. Saturn RDC, a Shield son, rockets to 164 RZG—tying Veterano for B&W genomic supremacy—while posting an eye-popping +0.88% fat that makes him the evaluation’s standout component sire. In Red & Whites, Bueno Red seizes the genomic crown at 161 RZG, blending exceptional production (+2,159 kg M) with superior type (121 RZE). The daughter-proven lists also turned over: Precision (148 RZG) now leads B&W with elite udders (132 Eut), while Mask Red (146 RZG) commands the Reds with standout functionality (126 Fun). Sire line trends confirm Real Syn’s grip on B&W genomics, but Shield and Borax Red progeny are rising fast across both breeds. The takeaway for breeders: elite components and top indexes are no longer mutually exclusive—and this proof run proves it.

The December 2025 German genetic evaluations have introduced several notable shifts and new high-ranking sires across both Black & White (Holstein) and Red & White (German Red Holsteins) breeds, according to the latest Interbull data. While top genomic RZG scores remain fiercely competitive, a new shared leader emerged in the B&W category, and the Red & White daughter-proven list crowned a fresh champion.

Here is a detailed report highlighting the changes and new entrants compared to the previous August 2025 rankings.

Black & White (B&W) Holsteins

Genomic Sires: Shared Leadership and Strong Components

The top of the Black & White genomic list (RZG) saw a slight overall shift in index values but welcomed a major new sire joining the former leader.

In the August 2025 evaluation, the undisputed top B&W genomic sire was Veterano (s. Vivify) with an RZG of 166. For December 2025, Veterano’s RZG moderated slightly to 164, resulting in a shared number one spot with the Shield son Saturn RDC.

• Saturn RDC (HB-Nr 103000) debuts strongly at 164 RZG. This newcomer is a notable component specialist, boasting exceptional fat content at +0.88% F (+110 kg F) and a strong mammary score (Eut) of 126. Saturn RDC’s RZhealth of 132 is exceptional.

Other key B&W genomic sires and their movement:

• Evenstar (s. Real Syn) dropped slightly from 164 RZG (August) to 163 RZG (December, rank 3).
• Realpower (s. Real Syn) also fell slightly from 164 RZG (August) to 163 RZG (December, rank 4). Realpower remains an outstanding production sire with +1,986 kg M and extremely high fat percentages at +0.61% F (+154 kg F).
• Two Real Syn sons continue to impress in the genomic charts:
  • DG Rico debuted (or was highlighted in the latest summary) at +160 RZG, noted for his +126 RZE(Type), +1,649 kgM, +0.51% F, and +0.02% P.
  • His full brother, DG Eliandro, achieved a 158 RZG and impressive type figures (+134 RZE, +1,582 kgM).

Daughter Proven Sires (Active AI Bulls, 500+ DEU Dtrs)

The Daughter Proven category saw significant turnover at the top, with bulls featuring at least 500 German daughters.

In August 2025, Mirco (s. Mick) led the domestic daughter-proven list at 144 RZG. The December 2025 evaluation introduces a new leader:

• Precision (HB-Nr 575319), ranking #1 with 148 RZG. This sire excels in conformation, showing an RZE of 133 and a particularly high Udder score (Eut) of 132.

Other notable changes in the daughter-proven segment:

• Zivet (s. AltaZarek), his RZG decreased slightly from 147 (August Interbull Top 1) to 146 (December, rank 2), while increasing his milk production to +2,074 kg M.
• Mirco dropped two points, moving from 144 RZG (August #1) down to 143 RZG (December #3).
• Sunrise also saw a slight drop in RZG, moving from 142 RZG (August Interbull #9) to 141 RZG (December #3 in the domestic list).

German Red Holsteins (R&W)

Genomic Sires: Bueno Red Takes the Lead

The Red & White genomic list also experienced a shift at the very top (RZG 161).

In August 2025, the top three Red & White genomic sires were tightly grouped at 161 RZG: Schach (s. Skat P RDC), Create P (s. CR 7 P), and Coco Red P (s. Cop Red PP).

In the December 2025 Interbull genomic rankings, the new #1 sire is Bueno Red (HB-Nr 823382, s. Borax Red) with a 161 RZG. Bueno Red stands out for excellent production figures (+2,159 kg M) and exceptional Type (RZE 121).

Key movements among the top R&W genomic sires:

• Create P (161 RZG in August) settled at 159 RZG (December rank 2).
• Cardiff P (160 RZG in August) landed at 159 RZG (December rank 3).
• Coco Red P (161 RZG in August) scored 159 RZG (December rank 4).
• Schach dropped slightly to 159 RZG (December domestic ranking #5), falling out of his shared #1 position from August.
• A new high entry in the top 5 is Maestro (s. Shield), achieving 159 RZG and strong components including +0.83% F and +0.41% E.

Daughter Proven Sires: Mask Red Ascends

The R&W Daughter Proven category also saw a leadership change. The August 2025 Interbull list was led by Rammstein (s. Jayvano) at 145 RZG.

For December 2025, Mask Red (s. Stamkos) is confirmed as the new chart-topper in the R&W RZG Daughter Proven index with 146 RZG. Mask Red offers solid production (+1,354 kg M) and excellent Functionality (Fun 126).

The previous leader, Rammstein, moved to #2 at 145 RZG. Importantly, Rammstein increased his components proof, now showing +0.01% F and +0.15% P.

Other major movements in R&W daughter-proven rankings (500+ DEU daughters):

• Ginger (s. Gywer RDC) saw an RZG decrease from 143 (August Interbull Rank 2) to 142 RZG (December Domestic Rank 1), but remains a strong milk bull (+2,719 kg M).
• Money P (s. Match P) also dropped slightly from 138 RZG (August Domestic Rank 1) to 137 RZG (December Domestic Rank 2).
• Garnier (s. Gywer RDC) decreased from 136 RZG (August Domestic Rank 2) to 135 RZG (December Domestic Rank 3).

The December 2025 German evaluation highlights the quick succession and strong performance of young genomic sires, particularly those sired by Real Syn (B&W), and the emergence of Shield and Borax Red progeny in the R&W categories. The Daughter Proven lists show Precision and Mask Red successfully capitalizing on their proof increases to claim the top spots in their respective breeds.

Key Takeaways:

• Saturn RDC Ties for B&W Crown: Shield son debuts at 164 RZG—matching Veterano—with +0.88% fat that sets a new standard for component excellence at elite index levels
• Bueno Red Seizes Red Leadership: New R&W genomic #1 at 161 RZG delivers both volume (+2,159 kg M) and type (121 RZE)—a rare combination
• Proven Lists Overturn: Precision (148 RZG, 132 Eut) now leads B&W daughter-proven; Mask Red (146 RZG, 126 Fun) takes R&W top spot
• Sire Line Trends: Real Syn continues B&W genomic dominance, but Shield and Borax Red progeny are ascending rapidly in both breeds
• Breeder Action: High-component, high-index genetics are no longer trade-offs—these December leaders prove you can have both

Complete Lists:

• GERMANY – B&W – Interbull Genomics – 12/25
• GERMANY – B&W – Interbull Dtr Proven – 12/25
• GERMANY – B&W – Domestic Genomics – 12/25
• GERMANY – B&W – Dtr Proven – 12/25
• GERMANY – B&W – Domestic 99% R Bulls – 12/25
• GERMANY – R&W – Interbull Genomics – 12/25
• GERMANY – R&W – Interbull Dtr Proven – 12/25
• GERMANY – R&W – Domestic Genomics – 12/25
• GERMANY – R&W – Dtr Proven – 12/25
• GERMANY – R&W – Domestic 99% R Bulls – 12/25

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