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Mating system in natural populations of Taurus cedar (Cedrus libani A.Rich.)

The aim of this study was to estimate patterns of the mating system in 2 natural Cedrus libani A.Rich. populations in Elmalı, Antalya, with the aid of isozyme markers. Isozyme analysis was performed on both maternal and embryo tissues of the seeds collected from Avlankuzu and Çamkuyusu populations. | B. B. BİLGEN, Y. KURT, N. KAYA Research Article Turk J Agric For 36 (2012) 379-387 © TÜBİTAK doi:10.3906/tar-1104-29 Mating system in natural populations of Taurus cedar (Cedrus libani A.Rich.) Behiye Banu BİLGEN, Yusuf KURT, Nuray KAYA* Biology Department, Faculty of Science, Akdeniz University, 07058 Antalya - TURKEY Received: 19.04.2011 Abstract: The aim of this study was to estimate patterns of the mating system in 2 natural Cedrus libani A.Rich. populations in Elmalı, Antalya, with the aid of isozyme markers. Isozyme analysis was performed on both maternal and embryo tissues of the seeds collected from Avlankuzu and Çamkuyusu populations. Eleven loci encoding 8 enzyme systems were analyzed. The Avlankuzu and Çamkuyusu populations were a homogeneous and similar gene pool for the loci studied. Based on a multilocus estimator, the proportion of viable seeds originating from outcrossing (tm) was 0.940 for the Avlankuzu population and 0.944 for the Çamkuyusu population. In other words, selfing in the Avlankuzu and Çamkuyusu populations was 6% and 5.6%, respectively. A high outcrossing rate, relatively high heterozygosity, and a lack of significant levels of inbreeding in the study populations are important components of the adaptive strategy of this species. Therefore these populations are not at risk for inbreeding depression is an important finding for the conservation of gene resources of this species. Key words: Cedrus libani, inbreeding, isozyme, mating system Doğal sedir (Cedrus libani A.Rich.) populasyonlarında eşleşme sisteminin belirlenmesi Özet: Bu çalışmanın amacı, Elmalı-Antalya’da bulunan Toros sediri (Cedrus libani A.Rich.)’nin iki doğal populasyonunda eşleşme sistemi parametrelerini izoenzim analizleri yardımıyla tahmin etmektir. İzoenzim analizlerinde Avlankuzu ve Çamkuyusu populasyonundan toplanan tohumların megagametofit ve embriyo dokuları kullanılmıştır. Analizler, sekiz enzim sistemi tarafından kodlanan 11 lokusta yapılmıştır. Çalışılan