Pregled genetske pestrosti turških in alžirskih avtohotnih populacij ovac

Abdelkader AMEUR AMEUR, Onur YILMAZ, Nezih ATA, Ibrahim CEMAL, Semir Bechir Suheil GAOUAR

Povzetek


Sistemi reje ovac v Alžiriji in Turčiji temeljijo na ekstenzivni kmečki reji, upravljanje s temi populacijami pa je privedlo do povečanja homozigotnosti in s tem do poslabšanja proizvodnih lastnosti. Ocena medpasemske in znotrajpasemske genske pestrosti igra ključno vlogo pri oblikovanju programov za ohranjanje teh pasem. Pričujoča študija je bila izvedena z namenom raziskovanja genske pestrosti avtohtonih pasem ovac v Turčiji in v Alžiriji. Skupno 240 živali štirih alžirskih (hamra, ouled djellal, sidaou in tazegzawt) in štirih turških (white karaman, south karaman, karacabey merino in kıvırcık) pasem je bilo genotipiziranih s štirinajstimi mikrosatelitnimi markerji, ki jih priporoča FAO. Na štirinajstih analiziranih markerskih lokusih je bilo zabeleženih 340 alelov. Vseh osem pasem je imelo zmerno do visoko stopnjo genske pestrosti z rahlo prevlado alžirskih pasem ovac. Skupna vrednost FIS je bila nizka, vendar statistično značilna (p < 0,001). To je verjetno posledica visokega inbridinga v populaciji. Povprečni globalni koeficient diferenciacije genov (GST) je pokazal, da je približno 94,0 % genske pestrosti znotraj populacije. Največ privatnih alelov s pogostostjo nad 5 % je bilo ugotovljenih pri ovcah pasme ouled djellal. Analiza strukture populacij je pokazala, da je K, ki predvideva štiri genetske klastre najprimernejši. Dendrogram, ki je rezultat študije, je pokazal, da so alžirske pasme ovac popolnoma ločene od turških, poleg tega pa je Bayesovo klastriranje pokazalo visoko stopnjo križanja, zlasti v alžirskih populacijah ovac.

Ključne besede


drobnica; avtohtone pasme ovac; genska pestrost; mikrosateliti; genetske distance

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2020.115.1.1229

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Avtorske pravice (c) 2020 Abdelkader AMEUR AMEUR, Onur YILMAZ, Nezih ATA, Ibrahim CEMAL, Semir Bechir Suheil GAOUAR

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