The Polbar is a
breed of chicken from Poland. It was created between 1946 and 1954 by Laura Kaufman, who
crossed the native Polish
Green-legged Partridge breed with American
Plymouth Rock
Plymouth Rock is the traditional site of disembarkation of William Bradford and the ''Mayflower'' Pilgrims who founded Plymouth Colony in December 1620. The Pilgrims did not refer to Plymouth Rock in any of their writings; the first known writt ...
birds. The aim was to introduce the barred gene of the Plymouth Rock to make chicks
auto-sexing
Auto-sexing breeds of poultry are those in which the sex of newly-hatched chicks can be determined from the colour and markings of the down. Some breeds of chicken, of goose and of domestic pigeon have this characteristic. The idea of such a b ...
– female chicks can be distinguished from males at one day old by the longer black eye-stripe.
There is one Polbar flock in Poland, at the Laura Kaufman Research Station of the
University of Life Sciences of
Lublin, in the eastern part of the country. It is kept for conservation only. At the end of 2014 there were 1100 birds.
References
{{reflist, 45em, refs=
[Barbara Rischkowsky, D. Pilling (eds.) (2007). [ftp://ftp.fao.org/docrep/fao/010/a1250e/annexes/List%20of%20breeds%20documented%20in%20the%20Global%20Databank%20for%20Animal%20Genetic%20Resources/List_breeds.pdf List of breeds documented in the Global Databank for Animal Genetic Resources], annex to [ftp://ftp.fao.org/docrep/fao/010/a1250e/a1250e.pdf ''The State of the World's Animal Genetic Resources for Food and Agriculture'']. Rome: Food and Agriculture Organization of the United Nations. {{ISBN, 9789251057629. Accessed January 2016.]
[Breed data sheet: Polbar/Poland]
Domestic Animal Diversity Information System of the Food and Agriculture Organization of the United Nations. Accessed January 2016.
[Magdalena Gryzinska, Ewa Blaszczak, Aneta Strachecka, Grazyna Jezewska-Witkowska (2013)]
Analysis of Age-Related Global DNA Methylation in Chicken
''Biochemical Genetics'' 51 (7-8): 554–563. {{doi, 10.1007/s10528-013-9586-9.
Chicken breeds
Chicken breeds originating in Poland