INTERVARIETAL POLYMORPHISM OF CONSTITUTIVE HETEROCHROMATIN IN HORDEUM-VULGARE L

An intervarietal chromosome banding polymorphism in 8 botanical variet ies of Hordeum vulgare viz., convar. hexastichon vars: coeleste and in grum; convar, distichon vars: inerme, pallidum and nutans; convar. vul gare vars: coeleste, horsfordianum and dwndarbeyi was studied by Giems a N-banding technique. Chromosomes were numbered according to the whea t homoeologue groups. The classification of the bands was in accordanc e to the generalized cytological nomenclature of cereal chromosomes (G CNCC). Majority of bands recognized in all varieties were centromeric or interstitial. Band polymorphism was observed on all chromosomes exc ept 1H, which exhibited typical banding pattern in all varieties.