Enhanced resolution of somatic chromosome constrictions as an aid to identifying intergeneric hybrids among some Triticeae.

Abstract

A somatic cytological technique is described as an aid to superior resolution of primary and secondary chromosome constrictions. Initially, intergeneric hybrids among some Triticeae can be readily identified by routine chromosome number counts, chromosome size or morphology, and satellite number. This includes those hybrids that involve parental combinations of similar polyploidy. Superior secondary constriction resolution can accurately enable detection of 1B/1R translocation in wheat varieties, advanced lines, or hybrid progenies derived from varieties that have the 1B/IR translocation. The results are discussed and photographically documented.