title: Cytogenetic evidence on the nature of speciation in wheat and its relatives.
mesh_terms: D005075:Biological Evolution; D002875:Chromosomes / Q000502:physiology; D003433:Crosses, Genetic; D008540:Meiosis; D010944:Plants / Q000235:genetics*; D012434:Secale / Q000235:genetics; D013045:Species Specificity; D014908:Triticum / Q000235:genetics*