The origin and evolution of a two-component system of paralogous genes encoding the centromeric histone CENH3 in cereals

Table 3 The percentage abundance of the main DNA classes in the intergenic spacers of the CENH3 locus in Triticeae

Species	Copia superfamily	Gypsy superfamily	Gypsy/ Copia	Transposons	Others
Hordeum spontaneum	27.2	21.4	0.79	7.9	6.4
Hordeum vulgare	50.9	13.0	0.25	3.0	3.4
Triticum urartu	28.9	15.8	0.55	0	14.4
Triticum aestivum, A genome	19.4	57.5	2.96	1.8	7.3
Aegilops speltoides	0	1.5		13.7	23.1
Triticum aestivum, B genome	22.0	34.1	1.55	7.0	4.7
Aegilops tauschii	23.2	44.3	1.91	2.8	1.2
Triticum aestivum, D genome	22.2	42.4	1.91	0.5	1.0

NOTE. Note: Only Triticeae species are presented, because only these species, except for Aegilops speltoides, have been identified as having upwards of 60% DNA sequences in the most common classes and superfamilies of transposable elements. The Others column is for non-LTR retrotransposons, simple repeats and unclassified sequences

ISSN: 1471-2229