| Autor: |
Kalashnik, N. A., Muldashev, A. A., Elizaryeva, O. A., Maslova, N. V. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 6/22/2022, Vol. 2467 Issue 1, p1-6, 6p |
| Abstrakt: |
It is for the first time that a research has been done to identify the number of chromosomes and determine their morphology in Hieracium iremelense (Elfstr.) Juxip (Asteraceae), a high-mountain endemic of the central part of the South Urals. It has been found out that the species under investigation is a triploid with 2n=27=3x that often has aneuploid cells with the number of chromosome from 3x+1 to 3x+8. Chromosomes of H. iremelense are medium-sized (2.84±0.04 to 4.82±0.07 µm) and of metacentric and submetacentric types. The variability of morphometric parameters in the chromosomes is characterized by very low and low values of the coefficient of variation. The highest level of variability is observed in the centromeric index and absolute length of chromosomes, the lowest one in their relative length. The revealed karyotypic features of the species under investigation can be used as the material for tackling controversial issues in the systematics of the genus Hieracium L., especially it concerns the species closely related to H. iremelense. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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