Document Type : Research Paper
Authors
1 Payam Noor University, Tehran, Iran
2 Research Institute of Forests and Rangelands, Tehran, Iran
Abstract
Moringa peregrina (Forssk.) Fiori is an important neglected plant species, with medicinal, industrial and nutritional values, growing in South-East part of Iran. In spite of its high importance in various points of views, the species is not paid enough attention regarding various biologic aspects such as karyotypic characteristics. Four plant populations as well as two tissue cultured samples of the species were used for karyotypic studies. Chromosome dimensions were recorded on which several statistics were estimated for karyotypic asymmetric comparisons on the mentioned plant populations and samples. The recorded karyotypic data were analyzed by nested and factorial statistic models. Chromosomes counting reviled the constant diploid karyotype with 2n=2x=28 chromosomes for all of the studied samples. Analysis of variance showed significant differences (α=1%) between the plant populations and samples based on the recorded karyotypic characteristics. Several anioploid cells were also recorded. It was concluded that the species contains small chromosomes, so that general chromosome means of the studied samples varied between 1.19 to 2.1 μ. The longest genome (51.2μ) belonged to Kenshki sample which was tissue culture based sample. The shortest genome (33.3μ) belonged to Garhoon plant population. In other words tissue culture based samples grouped in distinct classes compared to other studied plant populations. Chanf plant population showed the most symmetric karyotype (45%) based on TF%, whereas, Kenshki plant population revealed the most asymmetric karyotype (41%). DRL statistic and karyotype formula also clarified the mentioned symmetry conditions.
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