News Gene secrets of the tree revealed (BBC News/ForestPress)
The first tree to have its full DNA code unravelled is a poplar. The genome of the black cottonwood (Populus trichocarpa) was sequenced in a four-year international project led by US institutions. The work, reported in Science journal, shows the poplar tree has far less DNA in its cells than humans or other mammals, but twice the number of genes. Researchers say the new information will be a boon to the understanding of plant biology and evolution.