Analysis of chromosome karyotypes of Elytrigia intermedia and Elytrigia elongate

The chromosome karyotypes of Elytrigia intermedia and E.elongata were determined by the root tip squash method. This study showed that the chromosome type of E. intermedia was K (2n)=6x=42=34m+8sm, and the composition of relative length chromosomes was 10L+10M2+12M1+10S, belonging to 2B type. The chromosome type of E. elongata was K(2n)=10x=70=38m+22sm+8st+2t, and the composition of relative length chromosomes was 10L+22M2+30M1+8S, belonging to 2B type. These results would provide theoretical basis for their cytological characteristics and genetic mechanism research.