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Tuskan, G. A.; DiFazio, S.; Jansson, S.; Bohlmann, J.; Grigoriev, I.; Hellsten, U.; Putnam, N.; Ralph, S.; Rombauts, S.; Salamov, A.; Schein, J.; Sterck, L.; Aerts, A.; Bhalerao, R. R.; Bhalerao, R. P.; Blaudez, D.; Boerjan, W.; Brun, A.; Brunner, A.; Busov, V.; Campbell, M.; Carlson, J.; Chalot, M.; Chapman, J.; [...]

The Genome of Black Cottonwood, Populus trichocarpa (Torr. & Gray)

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  • Media type: E-Article
  • Title: The Genome of Black Cottonwood, Populus trichocarpa (Torr. & Gray)
  • Contributor: Tuskan, G. A.; DiFazio, S.; Jansson, S.; Bohlmann, J.; Grigoriev, I.; Hellsten, U.; Putnam, N.; Ralph, S.; Rombauts, S.; Salamov, A.; Schein, J.; Sterck, L.; Aerts, A.; Bhalerao, R. R.; Bhalerao, R. P.; Blaudez, D.; Boerjan, W.; Brun, A.; Brunner, A.; Busov, V.; Campbell, M.; Carlson, J.; Chalot, M.; Chapman, J.; [...]
  • imprint: American Association for the Advancement of Science (AAAS), 2006
  • Published in: Science
  • Language: English
  • DOI: 10.1126/science.1128691
  • ISSN: 0036-8075; 1095-9203
  • Origination:
  • Footnote:
  • Description: <jats:p> We report the draft genome of the black cottonwood tree, <jats:italic>Populus trichocarpa</jats:italic> . Integration of shotgun sequence assembly with genetic mapping enabled chromosome-scale reconstruction of the genome. More than 45,000 putative protein-coding genes were identified. Analysis of the assembled genome revealed a whole-genome duplication event; about 8000 pairs of duplicated genes from that event survived in the <jats:italic>Populus</jats:italic> genome. A second, older duplication event is indistinguishably coincident with the divergence of the <jats:italic>Populus</jats:italic> and <jats:italic>Arabidopsis</jats:italic> lineages. Nucleotide substitution, tandem gene duplication, and gross chromosomal rearrangement appear to proceed substantially more slowly in <jats:italic>Populus</jats:italic> than in <jats:italic>Arabidopsis. Populus</jats:italic> has more protein-coding genes than <jats:italic>Arabidopsis</jats:italic> , ranging on average from 1.4 to 1.6 putative <jats:italic>Populus</jats:italic> homologs for each <jats:italic>Arabidopsis</jats:italic> gene. However, the relative frequency of protein domains in the two genomes is similar. Overrepresented exceptions in <jats:italic>Populus</jats:italic> include genes associated with lignocellulosic wall biosynthesis, meristem development, disease resistance, and metabolite transport. </jats:p>