The Genomic Structure of Rice

The genome of Oryza sativa consists of 12 chromosomes, one circular mitochondrial DNA, and a circular chloroplast DNA. Additional information about the rice genome may be found at the TIGR Rice Genome Annotation site. Chromosomes are often drawn as in Figure 1 below: with a short and long arm and an intervening centromeric region. Figure 2 depicts the shapes and relative sizes of the Oryza sativa chromosomes. Table 1 shows the size (in Mbp) and predicted number of genes for each chromosome from Oryza sativa ssp. japonica(Nipponbare).

Figure 1

Figure 2

Table 1

Chromosome

Size
(Mb)
Predicted Number

of Genes

Chr1

45.1

4467

Chr2

36.8

3011

Chr3

37.3

3197

Chr4

35.9

2679

Chr5

30.0

2426

Chr6

32.1

2342

Chr7

30.4

2507

Chr8

28.5

2286

Chr9

23.8

1618

Chr10

23.7

1724

Chr11

30.8

1834

Chr12

27.8

1870

Mitochondria

0.491

96

Chloroplast

0.135

159

Total

~383Mb

30216