Establishment & Maintenance of The New World Carniolan Closed Population Breeding Program

The New World Carniolan (NWC) breeding program was founded in 1982, based on the Page-Laidlaw Closed Population Breeding concept. It was created to select and maintain a Carniolan honey bee population that provides quality queens to the industry. Initially established at Vaca Valley Apiaries in California by Susan Cobey and Tim Lawrence (1981–1990), the program later moved with Cobey to The Ohio State University (1990–2007), University of California, Davis (2007–2012), and Washington State University (2010–2023). This progression allowed the program to serve as a teaching model and focus more intensively on breeding.
The NWC program was designed to offer an alternative to the popular Italian honey bees, which were difficult to maintain in the U.S. due to the dominance of Italian bees and drones diluting Carniolan traits. Stocks with Carniolan backgrounds were collected across the U.S. and Canada, and through instrumental insemination and backcrossing, the New World Carniolan strain was established. Over time, these industrious and elegant bees have become highly regarded.

Mentored by experts such as Drs. Robert Page and Harry H. Laidlaw, and trained by Dr. Harry Laidlaw and Dr. John Harbo, the program applied the theory of Closed Population Breeding. The NWC population developed uniform dark coloration, gentle temperament, rapid spring buildup, reduced late-season brood, excellent wintering ability with low consumption, and increased resistance to pests and diseases—traits favored especially by northern beekeepers. Today, the NWC is an industry standard.

Bee logo with "New World Carniolan" text.
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Dr. Friedrich Ruttner, a renowned Austrian bee geneticist, praised the NWC line as the most Carniolan-like bees in the U.S. and Canada, despite not meeting strict “pure Am. carnica” criteria due to mixed stock backgrounds. The program later incorporated European A.m. carnica germplasm from Austria and Slovenia, imported under USDA-APHIS permits, increasing genetic diversity and vigor.
Additionally, germplasm from A.m. caucasica was imported from the Republic of Georgia to re-establish Caucasian stock in the U.S., with sequential backcrossing to the Carniolan maternal line.

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Key Principles for Longevity of the NWC Program

  1. Maintaining a large, genetically diverse population
  2. Simple and practical selection criteria
  3. Genetic control through instrumental insemination
  4. Consistent selection pressure over time
  5. Detailed record keeping

The program uses the Page-Laidlaw system, testing several hundred colonies headed by instrumentally inseminated queens. After evaluating general productivity and specific traits for pest and disease resistance, the top third of colonies are selected as breeders for the next generation. This cycle repeats annually, ensuring ongoing improvement. Breeder queens are provided to beekeepers and commercial producers who raise open-mated production queens.

Current Status and Contacts

Now entering its 40th generation, the NWC program is transitioning to be maintained by two producer partners in Northern California:

Buzz and Nicole Landon of Buzz's Bees, along with Valeri Severson and Phillip Russell of Strachan Apiaries, produce NWC breeder and production queens to continue this legacy.

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