2.1. Multiple sequence alignments and selection of representative
sequences
The genome sequence of O. sativa ssp. japonica cv. Nipponbare
(IRGSP build 4) (International Rice Genome Sequencing Project,2005) was retrieved from http://rapdb.dna.affrc.go.jp, and that of O.
sativa ssp. indica cv. 93-11 (BGI-RIS assembly) (Yu et al., 2002) was
retrieved from http://rice.genomics.org.cn/rice/index2.jsp. The
FLcDNA sequences from O. rufipogon W1943 were downloaded from
http://202.127.18.228/ricd/dym/ftp.php (Lu et al., 2008). RepeatMasker
(http://www.repeatmasker.org/) and the MIPS repeat element
database were used to mask repetitive sequences. In addition, vector
sequences and poly-A stretches were removed using custom-made
Perl scripts