Abstract
Abstract Accurate sequencing of the rice genome has ignited a passion for elucidating mechanism for sequence diversity among rice varieties and species, both in protein-coding regions and in genomic regions that are important for chromosome functions. Here, we have shown examples of sequence diversity in genic and non-genic regions. Sequence analysis of chromosome ends has revealed that there is diversity in both sequences and distribution in the region of telomere repeat arrays, from chromosome to chromosome, within a plant. Detailed study has allowed us to speculate the mechanism of generation of these arrays. Sequence analysis using various cultivated and wild rice of the sd1 gene, which contributed to the “Green Revolution” in rice varieties and their wild progenitors, has also demonstrated sequence diversity, which is correlated with taxonomic classification. These results indicate that detailed analysis of sequence diversity and comparison might give us a clue in elucidating mechanism of the evolution of rice genome.
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