Abstract:
:Using contiguous genomic DNA sequences of Arabidopsis thaliana, we were able to identify a region of conserved structure in the genome of rice. The conserved, and presumptive homoeologous segments, are 194 kb and 219-300 kb in size in Arabidopsis and rice, respectively. They contain five homologous genes, distinguished in order by a single inversion. These represent the first homoeologous segments identified in the genomes of a dicot and a monocot, demonstrating that fine-scale conservation of genome structure exists and is detectable across this major divide in the angiosperms. The conserved framework of genes identified is interspersed with non-conserved genes, indicating that mechanisms beyond segmental inversions and translocations need to be invoked to fully explain plant genome evolution, and that the benefits of comparative genomics over such large taxonomic distances may be limited.
journal_name
Genomejournal_title
Genomeauthors
van Dodeweerd AM,Hall CR,Bent EG,Johnson SJ,Bevan MW,Bancroft Isubject
Has Abstractpub_date
1999-10-01 00:00:00pages
887-92issue
5eissn
0831-2796issn
1480-3321journal_volume
42pub_type
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