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A synopsis of the cytogenetics of the genus Phlomoides (Lamiaceae) in Iran

Author:
Ranjbar, Massoud, Mahmoudi, Chonour, Jahaniyan, Sepideh
Source:
Caryologia 2016 v.69 no.4 pp. 330-338
ISSN:
2165-5391
Subject:
Phlomis, anaphase, centromeres, chromosome number, chromosome pairing, chromosome segregation, diploidy, meiosis, polyploidy, surveys, telophase, Iran
Abstract:
The present study reports the chromosome number and meiotic behavior of 11 populations belonging to four species of Phlomoides (L.) Moench. All populations showed the diploid chromosome number 2 n = 2 x = 22; consistent with the proposed base number of x = 11. Almost all taxa studied here displayed regular bivalent pairing and chromosome segregation at meiosis. However, meiotic abnormalities observed included varied degree of fragmented chromosomes, laggards and bridge in anaphase I to telophase II, precocious division of centromeres, asynchronous nucleus and cytomixis. In addition, a survey on chromosome counts of different species belonging to the genus Phlomoides throughout the world is presented and the base chromosome numbers and polyploidy levels discussed here.
Agid:
5581686