You have reached the IRRI Genebank, where your rice science journey begins. Home to more than 132,000 available accessions which includes cultivated species, wild relatives and species from related genera.

Descriptor: Maturity (mat)

Number of days from effective seeding to maturity
Reproductive Stage
Crop Germplasm Committee approved
Data Type:
Numeric descriptor
Maximum Length:
Responsible Site:
International Rice Research Institute (IRRI)

Studies or environments

Distribution of Values for Maturity (mat)

RangeNumber of Accessions
70.00000 - 145.8000083715
145.80000 - 221.6000029211
221.60000 - 297.4000021
297.40000 - 373.200000
373.20000 - 449.000000
449.00000 - 524.8000011
524.80000 - 600.600001
600.60000 - 676.400000
676.40000 - 752.200000
752.20000 - 828.000001

International Rice Genebank Germplasm Distribution and Exchange Policy

IRRI continues the free international exchange of germplasm, in accordance with the International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA). We provide rice in small quantities to any entity or establishment for research, breeding, or training for food and agriculture purposes; free of charge. At the same time, we gratefully receive seed contributions to add to our collection.

The procedure for acquiring seeds from IRRI are as follows:
1. Read, study and comply with Standard Material Transfer Agreement(SMTA).
2. Inquire, search and choose accessions through GRIN-Global or Genesys websites.
3. Submit requests electronically through the public websites (refer to #2)