The annotation data of BACs were used to investigate the
presence of resistance gene homologues in the target region of
chromosome 11 harbouring the blast resistance locus, flanked
by the SSLP markers RM206 and RM21. The primer
sequences of the SSLP markers, RM206 and RM21 matched
to BAC clones of B1356F10 and OSJNBa0041J17 (http://
www.tigr.org), respectively. The 20 cM region flanked by the
two SSLP markers (Fig. 1) included 23 BAC clones consisting
of various homologues involved in disease resistance. Interestingly,
40 resistance gene homologues, including one for
Xa21, two for RPS2, six for Cf2/Cf5, 20 for LRR (Leucinerich
repeat) proteins, three for protein kinases and one disease
resistance protein, were identified in the region that is flanked
by the markers RM206 and RM21