Cytology of some Iranian Stipa (Poaceae) species and populationsReport as inadecuate

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Acta Botanica Croatica, Vol.65 No.1 May 2006. -

Meiotic studies were performed on 16 populations of 13 Stipa species concerning polyploidy level, chiasma frequency and distribution, chromosome association and segregation. The species and populations studied possessed 2n = 24, 36 and 44 chromosome number. The chromosome numbers of four species are reported for the first time. The populations and species studied differed significantly in their meiotic characteristics. Meiotic abnormalities observed included laggard chromosome formation, stickiness and cytomixis. Cytomixis led to the formation of aneuploid meiocytes. Unreduced pollen grains were observed in some of the species, which differed significantly in their size compared to the normal (reduced) pollen grains.

chiasma frequency; polyploidy level; Stipa

Author: M. Sheidai - S. Attaei - M. Khosravi-Reineh -



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