Endangered Pinzgauer cattle subtype Jochberger Hummel are genetically distinct

Area of Science:

• Animal genetics
• Conservation biology
• Livestock breeding

Background:

• Autochthonous cattle breeds represent crucial genetic diversity and cultural heritage.
• Many heritage breeds face extinction due to small population size, inbreeding, and genetic drift.
• The Jochberger Hummel, a subtype of Pinzgauer cattle, is an endangered lineage originating from a single polled female.

Purpose of the Study:

• To evaluate the genetic uniqueness of the Jochberger Hummel cattle subtype.
• To determine if the Jochberger Hummel should be managed separately or with the broader Pinzgauer population.
• To assess the genetic diversity and admixture levels within the Jochberger Hummel.

Main Methods:

• Genetic diversity analysis of 844 cattle from seven breeds (Angus, Charolais, Holstein, Jochberger Hummel, Pinzgauer, Uckermaerker, Tux-Zillertaler).
• Utilized principal component analysis (PCA) to examine population structure.
• Employed biogeographical ancestry analysis to trace genetic origins and admixture.

Main Results:

• The Jochberger Hummel was confirmed as a distinct subtype of Pinzgauer cattle.
• Genetic admixture in the Jochberger Hummel was found to be less than 5%.
• The Jochberger Hummel exhibited a low inbreeding coefficient, indicating relative genetic health within the subtype.

Conclusions:

• The Jochberger Hummel possesses unique genetic characteristics that warrant its recognition as a distinct subtype.
• Conservation strategies should consider the Jochberger Hummel's unique genetic identity.
• Maintaining the Jochberger Hummel as a separate management group is supported by genetic evidence.