Cytogenetic study of the genus Cousinia (Asteraceae, section Serratuloideae) in Iran

Genetics and Molecular Biology

Masoud Sheidai²  Kazem Mehdigholi¹  Ahmad Ghahreman¹  Farideh Attar¹ 

[1] ,Shahid Beheshti University Biology Department Tehran,Iran

关键词: Cousinia;    chiasma frequency;    cluster analysis;    meiosis;   

DOI  :  10.1590/S1415-47572006000100022

来源: SciELO

【 摘 要 】

Meiotic studies of ploidy level, chromosome paring and chiasma frequency were performed on 11 Cousinia (Asteraceae) species of the section Serratuloideae. The diploid number of the species studied was 2n = 2x = 24 and 26 so these species possess two different basic numbers (x = 12 or 13), a phenomenon common to other sections of the genus. The chromosome numbers of 9 species are reported here for the first time. When the 2n = 24 and 2n = 26 species were subjected to cluster analysis based on relative meiotic characters two different clusters were formed indicating their distinctness. Our data support the results obtained from morphometry, anatomy, pollen morphology and molecular studies of the genus Cousinia.

【 授权许可】

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