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Runs of homozigosity patterns in Hrvatica chicken breed

A run of homozygosity (ROH) is defined as a stretch of consecutive homozygous loci in an individual genome. ROH can be caused by a variety of mechanisms, including inbreeding, genetic drift, and population bottlenecks. In chickens, ROH have been associated with several negative outcomes, including increased susceptibility to disease, decreased fertility, and overall inbreeding depression. However, ROH may also confer some advantages, such as increased resistance to parasites and greater tolerance to environmental stresses. The Hrvatica chicken is an autochthonous Croatian dual-purpose breed. It is a medium sized chicken with light brown plumage. One of the most important characteristics of this breed is that it is an excellent forager and does well in free-range conditions. It is a winter- hardy chicken that tolerates cold weather well. Hrvaticas are also known to be good mothers and often go broody. By analyzing the ROH distribution in 24 birds, we get a unique insight into the genetic history of the breed, selection pressure, and specific regions of the genome. All of this provides a good starting point for future selection, conservation, and management of this traditional breed that is capable of withstanding future changes in both the climate and the economy.

Hrvatica chicken breed, Runs of homozygosity, breed genetic history

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