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Meiotic chromosome number and behavior of Matthiola shehbazii sp. nov. (Brassicaceae, Anchonieae ) from central Iran
Author(s) -
Ranjbar Massoud,
Karami Somayeh
Publication year - 2014
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.2013.00326.x
Subject(s) - biology , brassicaceae , bivalent (engine) , meiosis , botany , chromosome number , population , chromosome , iucn red list , eudicots , taxonomy (biology) , genetics , zoology , karyotype , gene , chemistry , demography , organic chemistry , sociology , metal
Matthiola shehbazii Ranjbar & Karami (Brassicaceae) from Markazi Province, central Iran is described as a new species. Diagnostic characters, description, and taxonomic comments on the species are given. The geographical distribution of the new species is also mapped. The IUCN threat category and observations on its population are noted. Its morphological characteristics are compared with M. ovatifolia Boiss. as the most closely related species. Matthiola shehbazii is an allotetraploid plant and possesses 2n = 4x = 24 chromosomes, consistent with the proposed dibasic numbers of x = 6 and x = 7. The general meiotic behavior in the new species was nearly regular, with bivalent pairing and normal chromosome segregation at meiosis. However, some meiotic abnormalities were observed in the species including bridges and laggards. Results from morphology and chromosome count supported the separation of M. shehbazii as a new distinctive species.