In the first part of the present study, samples of 13 native Turkish sheep
breeds (n=628) were examined, individually and comparatively, with respect
to their 19 microsatellite loci to characterize them by employing various
statistical analyses. Low FST values, high mean number of alleles and allelic
richness as well as results of Factorial Correspondence Analysis and
Structure analyses showed the degree of admixture between native sheep
breeds of Turkey, IVE and SAK were observed as the most distincts of the
breeds and possible introgressions were detected in other breeds. The 2-
BAD, a software to examine the admixtures, was employed to estimate the
time of the admixtures and the MSVAR software was employed to detect
past demographic histories. In the second part, evaluations based on their
genetic characteristics were made in relation to their prioritization in
conservation studies. By employing four different approaches, it has been
concluded that IVE, SAK, KRY, KIV, HEM and breed from Central Anatolia
should be included in a conservation program for the preservation of
optimum genetic diversity. In the last part of the thesis breeds were also
characterized with respect to their relative risk of extinctions and their merits,
which were used to estimate the utilities of the breeds. Non-genetic factors,
collected based on the existing literature and surveys throughthe
questionnaires filled by the field specialists, were incorporated into genetic
factors to estimate the utilities of the breeds under different scenarios. In this
approach, it is concluded that NOR, AKK, SAK, IVE and HEM should be
included in the conserved set of breeds.
By the present study, it is believed that specific genetic features of the native
Turkish sheep breeds were documented, effects of sampling on the
population genetic studies was discussed, the need for a reliable data
(genetic and nongenetic, for characterizing the risks and merits of the
breeds) for the prioritization of the breeds in the long term sustainable
conservation ofthem was emphasized.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12614257/index.pdf |
| Date | 01 February 2012 |
| Creators | Acan, Sinan Can |
| Contributors | Togan, Inci |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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