Karyological study on endemic Astragalus stereocalyx Bornm. Milk-vetch in Turkey

Abstract

Chromosome number and karyotype of Astragalus stereocalyx Bornm. Milk-vetch in the section Stereocalyx Bornm. distributing naturally in Turkey were analyzed in detail. This species is endemic to Turkey and growing in Eskişehir and Konya provinces. Squash preparation method was used for chromosome study in this species. The somatic chromosome number was determined as 2n = 16 in A. stereocalyx. The basic chromosome number was observed as x = 8. The chromosome number and morphology of A. stereocalyx belonging to the genus Astragalus was investigated using Image Analysis System. The karyotype formula of this species consists of three median chromosome pairs and five submedian chromosome pairs. The somatic chromosome length between 1.07-2.23 µm. Total haploid chromosomes length was measured as 11.73 µm. The karyogram and ideogram were drawn based on centromeric index and arranged in the decreasing size order

Keywords

• Astragalus stereocalyx,Karyotype,Leguminosae,Turkey

Türkiye’deki endemik Astragalus stereocalyx Bornm. Geven türünde karyolojik çalışma

Abstract

Türkiye’de doğal olarak yetişen Stereocalyx Bornm. seksiyonunda yer alan Astragalus stereocalyx Bornm. Geven türünde kromozom sayı ve karyotipi detaylı olarak analiz edildi. Bu tür Türkiye için endemiktir, Eskişehir ve Konya illerinde yetişmektedir. Bu türün kromozom çalışmasında ezme yayma preparasyon yöntemi kullanıldı. A. stereocalyx türünde somatik kromozom sayısı 2n = 16 olarak belirlendi. Temel kromozom sayısı x = 8 şeklinde gözlendi. Astragalus cinsine ait olan A. stereocalyx’in kromozom sayı ve morfolojisi Görüntü Analiz Sistemi kullanılarak araştırıldı. Türün karyotip formülü üç median ve beş submedian kromozom tiplerinden oluşmaktadır. Somatik kromozom boyu 1.07-2.23 µm arasındadır. Toplam haploid kromozom uzunluğu 11.73 µm olarak ölçüldü. Karyogram ve idiyogramı sentromerik indeks ve büyükten küçüğe doğru azalan oranda çizildi

Keywords

• Astragalus stereocalyx,Karyotip,Leguminosae,Türkiye

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