Allozymes and growth habit of Aegilops tauschii: genetic control and linkage patterns

Aegilops tauschii line of spring type growth habit with the earliest heading among all the VIR world germplasm collection of this species was crossed with three Ae. tauschii lines of winter type growth habit with low, intermediate and the highest vernalization requirement. 12 enzyme loci were involved in genetic analysis. The growth habit was found to be encoded by single codominant major gene, Vrn-D2. The following linkages were found: Est5 – Nadhd2 in chromosome 3, Vrn-D2 – Aco2 – Cat2 and Pgm – Nadhd1 in chromosome 4, Est2 – Got2 in chromosome 6.