The logo and chromosome assignment of IRGSP' Our team is responsible for the decoding of chromosome

1
International Rice Genome Sequencing Project
The logo and chromosome assignment of IRGSP. Our
team is responsible for the decoding of
chromosome 5.
2
The gene density and T-DNA integration site at
rice chromosome 5. The bar represents this
chromosome, and the grey scale represent gene
density of that region.
3

4
The finding of gid1 gene which locates at center
of chromosome 5. Panel D. These three rice
plants were germinated and transplanted in the
same time. The left plant is the control plant,
the middle one is d1 mutant, and the right one is
gid1 plant. The zoom-in photo illustrates that
although this gid1 plant is very small, it
contains leaves, stems and roots, as the normal
plant does. Both the dwarf mutant d1 and severe
dwarf mutant gid1 are caused by changes of
sequences in rice chromosome 5. Panel B
illustrates how we pulled out the gene. We
walked in chromosome by using genetic markers and
finally found out the target gene. Panel A shows
the sequence of gid1 gene. This region contains
2450 words, written only with A, T, C, and G, the
genetic codes. It locates at the center region
of chromosome 5 and consists less then 0.01 of
the whole chromosome. While the two yellow
regions were cut and paste, it might be
translated into a protein, as shown in Panel C.
For the gid1 mutant, a G in the red circle
shown in Panel A changed to A, which in turn
would change one single amino acid, indicated at
the red circle of Panel C, and caused the failure
of the protein function. As the consequence, a
normal rice plant would become a severe dwarf
one, the gid1.