TETRA layer breeding has a history of 45 years. Thanks to the specialized knowledge of our colleagues and genetic programs based on foresighted market thinking, as well as successful research and development programs, our hybrids perform superbly under various climatic and management conditions. The number of our products expands continuously in order to serve different market requirements.

Our breeding is based in Hungary (Bábolna, Uraiujfalu), in the heart of Europe. We also have GP integrations in four continents based in the US, China, Africa and Europe.

Precise data collection on our high capacity elite and crossed progeny test farms, where modern technology is used to gather egg production and quality data from approx. 23.000 elite hens, provides the information for genetic selection. Our personalized and powerful genetic analysis program is able to choose the most valuable hens and males for the next generation by evaluating numerous traits of thousands of birds. Our aim is preserving uniformity in terms of production, while maintaining population diversity necessary for genetic progress. We need to create the right balance between these goals; therefore, currently we put more emphasis on using genetic markers. With the help of marker assisted selection, we are able to control certain parts of our genetic work depending on the market requirements.


Traditional tests still provide the most valuable information for our breeding, however, costs and availability of marker research improve rapidly and nowadays, they complement classical methods effectively.  

Consequent progress in our genetic work is supported by continuous research programs with our partner institutes; Kaposvar University (www.english.ke.hu) and Research Centre for Farm Animal Gene Conservation (www.geneconservation.hu). These long term collaborations ensure the highest standard of TETRA breeding and commercial stocks.

Our hybrids are characterized by high number of eggs, exceptional egg quality even with long laying cycle, tolerance against climatic and management conditions, exceptional livability. Selection program of our alternative breeds supported by cutting edge technologies, like computer tomography and meat quality tests, while sustainability remains one of the most important factors. We believe that all of our efforts will guarantee the competitiveness and increased popularity of TETRA hybrids around the world.  





  • G Milisits, E Szentirmai, T Donkó, Z Budai, J Ujvári, S Áprily, G Bajzik, Z Sütő (2015): Effect of starting body fat content and genotype of laying hens on the changes in their live weight, body fat content, egg production and egg composition during the first egg-laying period BRITISH POULTRY SCIENCE 56:(6) pp. 666-672. 

  • Milisits Gábor, Donkó Tamás, Szentirmai Eszter, Áprily Szilvia, Budai Zoltán, Ujvári Lajosné, Bajzik Gábor, Sütő Zoltán (2015): Különböző genotípusú tojóhibridek élősúlyának, testzsírtartalmának, tojástermelésének és tojásösszetételének változása az első tojástermelési periódus alatt ÁLLATTENYÉSZTÉS ÉS TAKARMÁNYOZÁS 64:(2) pp. 101-111

  • Milisits Gábor, Dalle Zotte Antonella, Cullere Marco, Donkó Tamás, Emri Miklós, Opposits Gábor, Szentirmai Eszter, Orbán Attila, Kustosné Pőcze Olga, Bajzik Gábor, Sütő Zoltán (2015):A genotípus, az ivar és a keltetőtojás sárgája arányának hatása a csirkék néhány húsminőségi paraméterének alakulására ÁLLATTENYÉSZTÉS ÉS TAKARMÁNYOZÁS 64:(3) pp. 178-189

  • Szentirmai E, Milisits G, Donkó T, Budai Z, Ujvári J, Áprily S, Bajzik G, Sütő Z (2015): Effect of starting body fat content of Leghorn-type laying hens on the changes in their body fat content, egg production and egg composition during the first egg laying period POLJOPRIVREDA (OSIJEK) 21:(1 Supplement) pp. 195-198. 23rd International Symposium “Animal Science Days”. Brijuni, Croatia: 2015.09.21 -2015.09.24.

  • A Almasi, B G Andrassyne, G Milisits, P O Kustosne, Z Suto (2015): Effects of different rearing systems on muscle and meat quality traits of slow- and medium-growing male chickens BRITISH POULTRY SCIENCE 56:(3) pp. 320-324. 


  • ALMÁSI ANITA, SÜTŐ ZOLTÁN, ORBÁN ATTILA, MILISITS GÁBOR, KUSTOSNÉ P OLGA, FÜLÖP TAMÁS, HORN PÉTER (2013): A hústermelő képesség fokozásának lehetőségei keresztezéssel előállított kettőshasznosítású tyúk genotípusoknál ÁLLATTENYÉSZTÉS ÉS TAKARMÁNYOZÁS 62:(3) pp. 281-292. 

  • Forgacs B, Almasi A (2013). New shell color evaluation method for more accurate selection in brown layer lines. Proceedings of the 8th European Symposium on Poultry Genetics. Venice,Italy


  • Almási A., Sütő Z., Budai Z., Donkó T., Milisits G., Horn P. (2012). Effect of age, sex and strain on growth, body composition and carcass characteristics of dual purpose type chicken. WORLDS POULTRY SCIENCE JOURNAL 68:(Suppl. 1.) pp. 285-288.


  • Szentirmai E., Milisits G., Donkó T., Budai Z., Ujvári J., Fülöp T., Repa I., Sütő Z. (2013). Effect of starting body fat content, genotype and age of laying hens on the composition of their eggs produced in the first egg laying period. WORLDS POULTRY SCIENCE JOURNAL 69:(Suppl.) pp. 74-75.


  • Szentirmai E., Milisits G., Donkó T., Budai Z., Ujvári J., Fülöp T., Repa I., Sütő Z. (2013). Comparison of changes in production and egg composition in relation to in vivo estimates of body weight and composition of brown and white egg layers during the first egg-laying period. BRITISH POULTRY SCIENCE 54:(5) pp. 587-593.


  • Szentirmai E., Milisits G., Donkó T., Forgács B., Ujvári J., Sütő Z. (2012). Comparison of changes in the body and egg composition of different white egg layers between 20 and 60 weeks of age. WORLDS POULTRY SCIENCE JOURNAL68:(Supplement1) pp. 1-4. (2012) 24th World’s Poultry Congress. Salvador, Brazil: 2012.08.05 -2012.05.09.


  • Milisits G., Sütő Z., Donkó T., Orbán A., Pőcze O., Ujvári J., Repa I. (2011) Examination of changes in the liveweight and body composition of TETRA-H chicks developed for higher meat production. WORLDS POULTRY SCIENCE JOURNAL 67:(Suppl.) pp. 117-118. (2011) 14th European Symposium on the Quality of Eggs and Egg Products and 20th European Symposium on the Quality of Poultry Meat. Leipzig, Germany: 2011.09.04 -2011.09.08.



  • Milisits G., Sütő Z., Donkó T., Orbán A., Pőcze O., Ujvári J., Repa I. (2010). In vivo examination of the muscle and fat tissue development in two broiler genotypes between 4 and 12 weeks of age. WORLDS POULTRY SCIENCE JOURNAL 66:(Suppl.) p. 738. (2010)


  • Tossenberger J., Babinszky L., Kühn, I (2010).Effect of phytase application on the calcium and phosphorus retention and balance of layers in the last third of the laying cycle. JOURNAL OF ANIMAL SCIENCE (JAS) 93:(SUPPL. 1) p. 380.


  • Tossenberger J., Babinszky L., Kühn I. (2007). Effect of phytase supplementation on the calcium and phosphorus retention in layers. JOURNAL OF ANIMAL SCIENCE (JAS) 85:(Suppl1) p. 509.