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CAPS markers specific to E<sup>b</sup>, E<sup>e</sup>, and R genomes in the tribe Triticeae
Somers, D.J.,Li, X.-M.,Lee, B.S.,Mammadov, A.C.,Koo, B.-C.,Mott, I.W.,Wang, R.R.-C. Canadian Science Publishing 2007 Genome Vol.50 No.4
<P> Wild Triticeae grasses serve as important gene pools for forage and cereal crops. Understanding their genome compositions is pivotal for efficient use of this vast gene pool in germplasm-enhancement programs. Several cleaved amplified polymorphic sequence (CAPS) markers were developed to distinguish the E<SUP>b</SUP>, E<SUP>e</SUP>, and R genomes. With the aid of disomic addition lines of wheat, it was confirmed that all 7 chromosomes of E<SUP>b</SUP>, E<SUP>e</SUP>, and R genomes carry these genome-specific CAPS markers. Thus, the identified CAPS markers are useful in detecting and monitoring the chromosomes of these 3 genomes. This study also provides evidence suggesting that some Purdue and Chinese germplasm lines developed for barley yellow dwarf virus (BYDV) resistance are different from those developed in Australia. Furthermore, Thinopyrum intermedium and Thinopyrum ponticum were shown to have different genome constitutions. Sequence analyses of the 1272 bp sequences, containing Ty3/gypsy retrotransposons, from the E<SUP>b</SUP>, E<SUP>e</SUP>, and R genomes also shed light on the evolution of these 3 genomes. </P>