Karyotype report for eight <i>Euphorbia</i> taxa cultivated in Turkey

Abstract

The purpose of this work is to identify chromosomal numbers and various karyological characteristics of eight Euphorbia taxa grown in Turkey (E. heteradena Jaub. & Spach, E. altissima Boiss. var. altissima, E. macroclada Boiss., E. orientalis L., E. cheiradenia Boiss. & Hohen., E. seguieriana Neck. subsp. sequieriana, E. aleppica L., and E. chamaesyce L.). It was discovered that the Euphorbia taxaʼs basic chromosome numbers were x= 8, 9, 10, and 11. This work determined the Stebbins classification, ploidy levels, karyotype formula, chromosomal length range, total karyotype length, various karyotype asymmetry values, and the A1 and A2 in each taxon. In addition, the dispersion diagram was created using A1 and A2. Euphorbia taxa were revealed 2n=16 or 18 chromosomes apart from E. aleppica has 2n=20 and, E.chamaesyce has 2n=44, is polyploid. Also, they have median and submedian centromeric chromosomes. According to Stebbins classification, E. heteradena is 3A, E. altissima var. altissima, and E. orientalis are 2B, and the remaining species are 2A.