Acta Botanica Croatica, Vol. 65 No. 1, 2006.
Original scientific paper
Cytology of some Iranian Stipa (Poaceae) species and populations
M. Sheidai
S. Attaei
M. Khosravi-Reineh
Abstract
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.
Keywords
chiasma frequency; polyploidy level; Stipa
Hrčak ID:
3349
URI
Publication date:
15.5.2006.
Visits: 2.012 *