Seher GÜVEN, Ünsal UMDU TOPSAKAL, Osman BEYAZOĞLU

Türkiye’den Bazı Doronicum (Asteraceae: Senecioneae) Taksonlarının Kromozom Sayıları

Bu çalışmada, Kuzeydoğu Anadolu’dan dört tanesi Türkiye endemiği olan dokuz Doronicum (Asteraceae) taksonunun mitotik kromozom sayıları sayılmıştır. D. balansae, D. bithynicum subsp. bithynicum, D. dolichotrichum, D. macrolepis, D. maximum ve D. tobeyi’nin kromozom sayıları ilk kez bu çalışmada bildirilmiştir. Somatik kromozom sayıları, aktif kök uçlarından elde edilen ezme preparatları kullanılarak sayıldı. İncelenen tüm taksonların diploid (2n = 60) olduğu kanıtlanmıştır. Doronicum üyelerinin daha önce bildirilen kromozom sayıları ile uygunluk gösteren bu araştırma, cinsin kromozom sayısı verilerine katkı sağlamıştır.

Anahtar Kelimeler:

Kromozom sayısı, Doronicum, Senecioneae, Anadolu

Chromosome Counts of Some Doronicum (Asteraceae: Senecioneae) Taxa from Turkey

In the present study, mitotic chromosome numbers of nine taxa of Doronicum (Asteraceae) from the northeast Anatolia, four of which are endemic to Turkey, were counted. The chromosome counts of D. balansae, D. bithynicum subsp. bithynicum, D. dolichotrichum, D. macrolepis, D. maximum, and D. tobeyi were reported in this research for the first time. Somatic chromosome numbers were counted using squash preparations obtained from active root tips. All the investigated taxa have been proven to be diploid (2n=60). This research, consistent with the previously reported chromosome counts of the members of Doronicum, has contributed to chromosome number data of the genus.

Keywords:

Chromosome count, Doronicum, Senecioneae, Anatolia,

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