+420 NVI. A longevity score of +1,295. Altazazzle bloodlines dominating proven sires. The Dutch December 2025 rankings just raised the bar—here’s who’s setting it.

Executive Summary: The +400 NVI barrier hasn’t just been broken; it’s been shattered. Genosource Moti leads the charge at +420 NVI—a benchmark that redefines what’s achievable through genomic selection. Joining him in the top 10 are stablemates Mystro (posting the evaluation’s highest INET at +799) and Benson, whose +1,295 longevity score stands alone in this release. Among proven sires, Badger Ssi Ahead Jaffa tops the list at +358 NVI, while Altazazzle sons claim four of the top 10 spots—a concentration that underscores both the line’s commercial dominance and the breed’s narrowing genetic base. What sets this evaluation apart is balance: elite NVI bulls are simultaneously delivering on longevity, udder health, and fertility, breaking the historic trade-off between production and functionality. The Genosource and Delta programs command the genomic tier; Altazazzle defines the proven ranks. For breeders, this release offers exceptional genetic tools—with the caveat that pedigree concentration at the top makes diversity management more critical than ever.

There’s something particularly exciting about cracking open a new proof run. The December 2025 Dutch genetic evaluation landed with some eye-catching numbers—and a few surprises worth talking through. For breeders working with Dutch and Flemish genetics, this release offers a snapshot of where the breed is heading, and honestly, the trajectory is impressive.

The NVI (Nederlands-Vlaamse Index) continues to do what it was designed to do: identify bulls capable of producing daughters that are profitable, durable, and trouble-free. It’s a total merit index that balances production with the functional traits that actually keep cows in the herd—things like udder health, fertility, and feet and legs. What I’ve noticed over the past several proof runs is how the top end of these rankings keeps climbing. We’re seeing NVI values now that would have been almost unthinkable five years ago.

Let’s dig into what this release is showing us.

The Genomic Leaders: A New Benchmark

The genomic sire rankings this round are nothing short of remarkable. We’ve crossed a threshold here that deserves attention.

Genosource Moti sits atop the list at +420 NVI—a number that genuinely made me do a double-take when I first saw it. This Matcrest Arc son out of a Stgen Cowen Tho dam combines serious production punch (+2,025 kg Milk, +130 kg Fat, +68 kg Protein) with functional longevity (+872 days). His INET of +682 signals that daughters should convert feed to profit at an elite level. At 66% reliability, he’s still a genomic prospect, but the genetic package is hard to ignore.

What’s interesting about the top of this list is the diversity of pathways to elite NVI. Halifax Delta Dawn (+414 NVI), a Hammerhead son, takes a slightly different route—he posts the highest INET among the top five genomics at +737, driven by exceptional component transmission (+138 kg Fat, +75 kg Protein). His +2,220 kg Milk puts him among the highest-volume transmitters in the evaluation.

Rise Up Real (+410 NVI) caught my attention for a different reason entirely. This Real Syn son stands out as a longevity specialist, posting +1,019 days—the highest among the top five genomic bulls. For herds where keeping cows productive across multiple lactations is a priority, that’s a significant number. His +2,422 kg Milk shows you don’t have to sacrifice production to get durability.

Top 10 Genomic Sires by NVI — December 2025 (Black & White)

Source: CRV Nederland, December 2025 Genetic Evaluation (Zwartbont/Black & White Holstein). Genomic sires listed at 66–75% reliability. Production values in kg.

What the Pedigrees Are Telling Us

If you scan down that top-10 list, a few patterns jump out. The Genosource program has clearly hit its stride—three bulls in the top ten (Moti, Mystro, and Benson), all built on either Matcrest Arc or Radical foundations. That’s not an accident. These pedigrees have been stacked for production efficiency, and it’s showing up in the rankings.

The Delta breeding program from CRV is equally impressive, placing Miller, Time Jump, and Standout in the upper tier. What I find notable here is the consistency—these aren’t one-hit wonders but rather the product of a coherent breeding philosophy emphasizing balanced improvement.

The Real Syn sire line deserves special mention. He appears as the sire of Rise Up Real (#3), and his influence extends throughout the evaluation. This line seems to offer a particular combination of high milk volume with above-average longevity—a balance that’s historically been tricky to achieve.

Now, here’s where I’d offer a word of caution. The genetic engine is running hot, but it’s running narrow. When you see this much concentration of specific bloodlines at the top of the rankings, it’s worth thinking carefully about genetic diversity in your own herd. These sires offer tremendous genetic potential, but smart breeders need to use these tools strategically—or risk painting themselves into a pedigree corner. Monitor inbreeding levels and maintain enough diversity to keep your herd genetically resilient for the long haul.

The Proven Sires: Where Reliability Meets Results

Genomic sires represent what’s possible. Daughter-proven bulls show us what’s been delivered. For breeders who prioritize predictability—and there are good reasons to do so—the proven sire rankings provide a different kind of value.

Badger Ssi Ahead Jaffa leads the proven list at +358 NVI. This Ahead son from an A-S-Cannon Frzz dam has built his proof on genuine daughter performance, and the numbers are compelling. His +629 INET paired with +846 days longevity demonstrates that elite profitability doesn’t have to come at the expense of durability. The component transmission is solid (+102 kg Fat, +75 kg Protein), and his daughters are showing up well for udder health (107) and frame (106).

What farmers are finding with bulls like this is consistency. When you use a proven sire with high reliability, you know what you’re getting. There’s real value in that predictability, especially for operations where managing variance matters.

Peak Altazemini (+321 NVI) represents the continued strength of the Altazazzle bloodline. This Peak Genetics bull combines +592 INET with solid component transmission (+104 kg Fat, +65 kg Protein). His daughters are proving up well for both production and type.

Kax Gladius Gazebo (+320 NVI) takes a different approach—he’s the volume specialist in this group. At +2,745 kg Milk, he posts the highest production of any proven sire in the top ranks. For herds in fluid milk markets or operations pushing for maximum throughput, that kind of volume transmission is attractive. His Superhero maternal grandsire contributes proven durability genetics.

Top 10 Daughter-Proven Sires by NVI — December 2025 (Black & White)

*Source: CRV Nederland, December 2025 Genetic Evaluation (Zwartbont/Black & White Holstein). Production values in kg. Genomically enhanced proof with limited daughter data reported.

The Altazazzle Story

Looking at the proven sire rankings, the story isn’t just about who is number one—it’s about who owns the board. Altazazzle bloodlines claim four of the top ten spots (Peak Altazemini, Peak Breaking News, Peak Altazingler, and Peak Fugleman). That isn’t just influence; it’s a takeover.

The market has spoken: this line delivers the “invisible cow” commercial dairies crave—moderate, functional, and invisible until you look at the milk check. Altazazzle daughters aren’t extreme in any one direction, but they’re consistently profitable. They show up, milk, breed back, and don’t create problems. In commercial operations where trouble-free cows drive the bottom line, that consistency has real value.

The Finder bloodline also continues to show well through Delta Reloader (#8), who posts +701 days longevity backed by 95% reliability. That’s a substantial proof—the kind of daughter base that gives you real confidence in the numbers.

A Note on the Red & White Rankings

This article focuses on the Black & White (Zwartbont) evaluation, but it’s worth noting that the Red & White rankings delivered their own headline: Delta Richman PP-Red leads the R&W genomic sires at +414 NVI—a remarkable figure that would have topped the B&W list just a few proof runs ago. We’ll cover the R&W evaluation in detail separately, but breeders working with red genetics should take note: the color line is producing elite genetics of its own.

Trait Leaders: Bulls for Specific Breeding Goals

Sometimes the best bull for your herd isn’t the one at the top of the overall ranking. It’s the one that fixes your specific problem or pushes your herd in a particular direction. Here’s where looking beyond NVI becomes valuable.

For Maximum Component Value

If butterfat and protein payments drive your milk check—and they do for most producers these days—these bulls deserve attention:

• Genosource Mystro (Matcrest Arc): INET +799, +146 kg Fat, +84 kg Protein
• Halifax Delta Dawn (Hammerhead): INET +737, +138 kg Fat, +75 kg Protein
• Delta Miller (Altamuller): INET +692, +119 kg Fat, +78 kg Protein

Mystro, in particular, posts the highest INET in the entire genomic evaluation. For herds focused on maximizing revenue per hundredweight in component-driven markets, he’s worth serious consideration.

For Herd Life and Trouble-Free Cows

Some operations prioritize keeping cows in the herd. Replacement costs, the learning curve for first-lactation animals, the value of mature cows hitting their production stride—there are solid economic arguments for breeding bulls that transmit longevity. These genomic sires excel in that department:

• Genosource Benson (Radical): Longevity +1,295 days, Udder Health 100, Fertility 100
• Delta Miller (Altamuller): Longevity +1,032 days, Udder Health 106, Fertility 105
• Rise Up Real (Real Syn): Longevity +1,019 days, Udder Health 105, Fertility 104

Benson’s +1,295 longevity figure stands out—it’s the highest among any bull in the top genomic ranks. His daughters should be the kind that stick around, lactation after lactation.

For Functional Conformation

In modern free-stall facilities, cows need to move well and have udders that hold up to the demands of robotic or parlor milking. Functional type isn’t about winning shows—it’s about keeping cows productive and comfortable. Among the proven sires:

• Peak Altazingler Et (Altazazzle): Udder 100, Feet & Legs 91, Frame 108
• Peak Breaking News (Altazazzle): Udder 106, Feet & Legs 91, Frame 108
• Delta Reloader (Finder): Udder 103, Feet & Legs 103, Frame 110

Delta Reloader’s combination of strong udders and excellent feet and legs makes him particularly valuable for herds where cow mobility and udder durability are concerns.

Putting It Together: What This Means for Your Breeding Program

The December 2025 Dutch evaluation confirms several trends that have been building over recent proof runs. The genetic level at the top continues to climb—NVI values above +400 are now a reality in the genomic ranks. The balance between production and functionality seems to be improving, with several bulls combining high INET with strong longevity figures.

Here’s how I’d think about using this information:

Consider a tiered approach. Use high-NVI genomic sires like Genosource Moti or Halifax Delta Dawn on a portion of your herd—perhaps your best cows or heifers—to capture the latest genetic progress. At the same time, lean on high-reliability proven sires like Badger Ssi Ahead Jaffa for core breeding decisions where predictability matters most. This balances potential against certainty.

Use trait leaders for corrective mating. That’s what they’re there for. If you’ve got a family with udder depth concerns, reach for a bull like Delta Reloader. If fertility has been an issue, look at bulls with strong VRU scores. The overall NVI matters, but the breakdowns of individual traits matter too.

Watch your pedigree concentrations. I mentioned this earlier, but it bears repeating. With Altazazzle so heavily represented in the proven ranks and Matcrest Arc/Radical dominant in the genomics, it would be easy to stack these bloodlines inadvertently. Monitor your inbreeding levels and maintain enough diversity to keep your herd genetically resilient.

Think about your market. A high-volume bull like Kax Gladius Gazebo (+2,745 kg Milk) makes sense in certain situations—fluid milk contracts, high-throughput operations, markets where volume still drives revenue. But if you’re selling milk on components, the math might favor a bull like Genosource Mystro with his exceptional fat and protein transmission.

The Bottom Line

The Dutch genetic evaluation continues to produce bulls capable of meaningful genetic progress. What strikes me about this December 2025 release is the overall quality at the top—whether you’re looking at genomic prospects or proven sires, multiple options combine elite production potential with the functional traits that keep daughters profitable over time.

The work happening in Dutch and Flemish breeding programs is clearly paying dividends. For breeders worldwide who access these genetics, the opportunity exists to tap into some of the best Holstein genetics available.

As always, the key is matching the right genetics to your specific operation, your market, and your goals. These rankings are a tool—a useful one—but the real work happens when you apply them thoughtfully to your own breeding decisions.

KEY TAKEAWAYS

• Genomic selection crosses +420 NVI: Genosource Moti’s December 2025 ranking isn’t incremental—it marks a new threshold in genetic potential that will reshape sire selection benchmarks globally
• Proven genetics deliver when predictability matters: Badger Ssi Ahead Jaffa leads at +358 NVI, combining +629 INET with +846 longevity at high reliability; for core breeding decisions, daughter-proven sires remain indispensable
• Altazazzle commands the proven ranks: Four sons in the top 10 proven sires—this bloodline continues to define what commercial profitability looks like in today’s markets
• The production-longevity trade-off is breaking down: Genosource Benson pairs +1,295 longevity with +656 INET; elite genetics now deliver cows that stay in the herd AND fill the tank
• Diversity management becomes a competitive advantage: With Genosource, Delta, and Altazazzle dominating both genomic and proven tiers, herds that strategically maintain pedigree breadth position themselves for long-term resilience

Top Lists:

• Netherlands – B&W – Genomic Bulls – 12/25
• Netherlands – B&W – Dtr proven bulls – 12/25
• Netherlands – B&W – Dtr proven INTERBULL – 12/25
• Netherlands – R&W – Genomic Bulls – 12/25
• Netherlands – R&W – Dtr proven bulls – 12/25
• Netherlands – R&W – Dtr proven INTERBULL – 12/25

Data throughout this article sourced from CRV Nederland, December 2025 Genetic Evaluation (Perspublicatie stierindexen Zwartbont). All NVI values, production figures, and functional trait scores reflect official December 2025 proof data for Black & White (Zwartbont) Holsteins. Reliability percentages reflect CRV’s published figures for each sire. For complete R&W rankings and additional detail, consult the full CRV evaluation reports.

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