【摘 要】
：
To investigate genome size evolution,it is usually informative to compare closely related species that vary dramatically in genome size.A whole genome dupli
【机 构】
：
Institute of Crop Science
【出 处】
：
2005 World DNA and Genome Day(2005中国(大连)国际DNA和基因组节大会)
论文部分内容阅读
To investigate genome size evolution,it is usually informative to compare closely related species that vary dramatically in genome size.A whole genome duplication (polyploidy) occurred in rice (Oryza sativa) about 70 million years ago has been well documented based on current genome sequencing.Three distinct duplicate blocks from the polyploidy,of which one duplicated segment in a block was intact (no sequencing gap) and less than half the length of its syntenic duplicate segment,provided excellent evidence for elucidating the causes for their size variation during the post-polyploid time.The results indicated that the incongruent patterns (shrunken,balanced and inflated) of chromosomal size evolution had exited in the three duplicate blocks,spanning over 30 Mb among chromosome 2,3,6,7 and 10,or average 20.3% of them.
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