KARYOTYPIC STUDY OF THE GENUS BROMUS SECTION GENEA SPECIES IN IRAN

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ARIAVAND A.

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Journal: IRANIAN JOURNAL OF BIOLOGY Year:2002 | Volume:12 | Issue:1-2 Page(s): 38-51

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Title

KARYOTYPIC STUDY OF THE GENUS BROMUS SECTION GENEA SPECIES IN IRAN

Author(s)

ARIAVAND A. | Issue Writer Certificate

Keywords

BROMUS; SECTION GENEA; CYTOTAXONOMY; KARYOTYPEQ3

Abstract

In this article, the karyotypic characters of the Iranian species of the Bromus belonging to the section Genea Dumort. have been studied. The mature seeds were collected .during different field trips by author and other botanists from, different regions of Iran. Root meristems, after pretreatment by ice water or colchicine, solution, were fixed in Carnoy's fixative. The root tips, after hydrolysis by N HCl at the temperature of 60°C, were stained in a mixture of 2% acetoorcein and Schiff's reagent. Microscopic preparations were made in acetoorcein. At least, 10 metaphase plates have been .studied for each species. The following measurements were done: Total length of individua; chromosomes (t), Length of longer arm of each chromosomes (I), Length of shorter arm of each chromosomes (s). Then, the karyotypic indicators were calculated. The idiograms of species were drawn. Furthermore, by using Levan et al. method, the centromer position of the chromosomes and karyotypic formulae and according to the two way systems of Stebbins, Karyotypic symmetry have been determined. By using statistica software and performing UPGMA and Ward's method clustering, the affinity of the species was studied and the results were presented in dendrograms. This study shows that the basic chromosome number in this group (x) is equal to 7. From the taxa studied, B. Madritensis L. and B. rubens L. are tetraploids, while B. fasciculatus Presl, B. sericeus Drobov, B. sterilis L. and B. tectorum L. are diploids. The karyotype of these species has been drawn. Taking into consideration of morphologic variations and geographic distribution, the relationship of the -taxa have been discussed. These results confirm, more or less, the results of our previous study of phenetic analysis in this group.

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APA: Copy

ARIAVAND, A.. (2002). KARYOTYPIC STUDY OF THE GENUS BROMUS SECTION GENEA SPECIES IN IRAN. IRANIAN JOURNAL OF BIOLOGY, 12(1-2), 38-51. SID. https://sid.ir/paper/21175/en

Vancouver: Copy

ARIAVAND A.. KARYOTYPIC STUDY OF THE GENUS BROMUS SECTION GENEA SPECIES IN IRAN. IRANIAN JOURNAL OF BIOLOGY[Internet]. 2002;12(1-2):38-51. Available from: https://sid.ir/paper/21175/en

IEEE: Copy

A. ARIAVAND, “KARYOTYPIC STUDY OF THE GENUS BROMUS SECTION GENEA SPECIES IN IRAN,” IRANIAN JOURNAL OF BIOLOGY, vol. 12, no. 1-2, pp. 38–51, 2002, [Online]. Available: https://sid.ir/paper/21175/en

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