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Twenty years of the European bison Lowland line Bison bonasus bonasus conservation in captivity

100%

Sobieraj A., Olech W.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

2018

tom 57[2]

Twenty years of the Lowland European bison Bison bonasus bonasus conservation in captivity. The aim of the work was to track back changes taking place in the Lowland European bison population kept in captivity in years 1995-2015. The material for the study was data from European Bison Pedigree Book, collected from the years 1924-2015. The parameters such as inbreeding coefficient, kinship coefficient, contribution of founder genes and completeness of pedigree information were analyzed as well as the demographic structure of the population. Over the past 20 years, a steady increase in the population size has been observed. The share of different countries in Lowland wisent breeding also changed. The study showed that the accuracy of pedigree information decreased significantly between 1995 and 2015. In 1995 169 from 342 animals living in captivity had full pedigree information. In 2005 it was 76 from 320 animals. Within the population being alive in 2015, only 62 form 577 (10%) of all animals from Lowland line have full pedigree information, that leads to the founders of the population. An increase in the average values of inbreeding coefficient in the population and mean kinship was also observed.

An attempt at analysing the selected traits of body conformation, growth, performance and genetic structure of Lithuanian native Zemaitukai horse, the breed being preserved from extinction

100%

Macijauskiene V., Juras R.

Animal Science Papers and Reports

2003

tom 21

nr 1

Over the last 50 years the traits of valuable indigenous Lithuanian Žemaitukai horse have not been investigated and during the last decade the breed became on the verge of extinction. Recently certain measures were undertaken to preserve the breed, evaluate its present characteristics and compare them with those reported earlier. Body size and conformation traits of present-day Žemaitukai horse (ŽH) were found corresponding or similar to those of the ancient type, showing that many valuable characteristics of the breed are retained. Mares’ milk yield and composition were evaluated, as well as development of foals based on body dimensions. Genetic variation, genetic structure as well as relationship between the lines and families of ŽH were studied using blood typing and electrophoretic analysis of serum proteins. Gene frequencies are presented at six blood group (A, D, C, Q, P, K) and five protein ( Al, Es, Gc, Xk, Tf) loci. The genetic diversity within blood groups and serum proteins in ŽH kept in a closed population showed that out of eleven genetic systems examined, six were polymorphic. This is especially so for the A and D, as well as Es and Tf systems. The distribution of allele frequencies varied between the lines and families.

Ograniczanie wyników

1 Animal Science Papers and Reports

1 Annals of Warsaw University of Life Sciences - SGGW. Animal Science

1 Juras R.

1 Macijauskiene V.

1 Olech W.

1 Sobieraj A.

1 2018

1 2003

Wyniki wyszukiwania

Twenty years of the European bison Lowland line Bison bonasus bonasus conservation in captivity

An attempt at analysing the selected traits of body conformation, growth, performance and genetic structure of Lithuanian native Zemaitukai horse, the breed being preserved from extinction