the karyotypic characteristics of   chub, squalius cephalus have been investigated by examining metaphase chromosomes spreads obtained from gill and kidney tissues. the fish used in the study were caught with fishing nets from dumlu stream, one of the main tributaries of the karasu river. the live fish were transported to the laboratory,  kept in a well aerated aquarium before analysis and then...

human chromosomes in amnion cells and lymphocytes with normal karyotype and in lymphocytes with pathological karyotype (2n=47, +21) were compared as to their position in the metaphase. none of the collectives showed sex differences. measurement of the radial distances revealed more peripheral position of the majority of large chromosomes. the satellite-carrying chromosomes of the d group always...

to locate the genes controlling adaptability in bread wheat using ammi (additive main effect and multiplicative interaction) model, twenty-one substitution lines derived from the parents chinese spring (recipient) and chayan (donor) were used in a randomized complete block design with three replications in three different environments in the agricultural college of razi university, kermanshah, ...

the karyotype of pike from anzali lagoon in the south caspian sea basin have been investigated by examining metaphase chromosomes spreads obtained from gill epithelial and kidney cells. the chromosomes spreads were stained with 7% giemsa solution for 15 min and examined under a light microscope. appropriate metaphase plates were photographed in order to prepare karyotype. all specimens had a di...

Supernumerary mini-chromosomes–a unique type of genomic structural variation–have been implicated in the emergence virulence traits plant pathogenic fungi. However, mechanisms that facilitate and maintenance mini-chromosomes across fungi remain poorly understood. In blast fungus Magnaporthe oryzae (Syn. Pyricularia ), have first described early 1990s but, until very recently, overlooked studies...