in order to determine the cytotypes of 67 accessions of aegilops crassa from iran, two flow cytometry and cytogenetics methods were applied. the nucleus of the young leaves was colored using dapi and the intensity of fluorescent determined by flow cytometry. by comparing the intensity of the fluorescent of the ae. crassa samples with ae. tauschii (as an standard sample), two cytotypes 4x and 6x...

background: various frequencies of sperm aneuploidy are reported in sperms of subfertile patients compared to normal individuals. moreover, sperm dna damage is shown to be associated with male infertility. in this study, the rate of dna damage and frequencies of aneuploidy in sperms of subfertile patients was investigated. methods: semen samples were obtained from healthy normal and subfertile ...

genus onobrychis comprised of many cultivated as well as wild species is adapted to different regions of iran. this study was conducted to evaluate the karyotype characteristics of seven onobrychis species, employing the analysis of metaphase chromosomes of mitotic cells. results revealed that the species o. melanotricha (from semirom and feriedan)‚ o. sativa (from arak and boroujen) with 2n=28...

The stingless bee Partamona helleri (Meliponini) is distributed across the Atlantic rainforest biome in Brazil. Cytogenetic studies on P. have shown a conserved diploid number and presence of several B chromosome types. Our goal was to investigate intraspecific karyotypic variation among 21 colonies from 14 different localities four Brazilian states, using classical molecular cytogenetics, as w...