JRO-524 (Navin)
The most widely grown tossa (Corchorus olitorius) variety in India, bred at CRIJAF from an African × indigenous cross. Not yet individually researched for a detail page.
Quick facts
- Crop
- Jute
- Type
- Open-pollinated
- Season
- Kharif
- Maturity period
- 120–130 days
- Expected yield
- 32–40 q/ha fibre under good management
- Suitable soil
- Loam
- Release
- ICAR-CRIJAF, Barrackpore, West Bengal — released 1977, cross of Sudan Green × JRO 632
About this variety
JRO-524 (Navin) is a tossa jute (Corchorus olitorius) variety released by ICAR-CRIJAF in 1977, bred from the cross Sudan Green × JRO 632 — an African × indigenous cross, matching this record's existing note. Its own draft genome has been separately published (PubMed/ScienceDirect), reflecting its status as the most widely grown tossa jute variety in India. It has non-shattering pods that resist premature flowering even when sown as early as mid-March, and field reports describe it as least susceptible to yellow mite among common tossa varieties, with resistance to root rot in high-rainfall conditions.
Key characteristics
Yield & maturity
Maturity period
120–130 days
Expected yield
32–40 q/ha fibre under good management
Actual yield depends on sowing time, soil, irrigation, weather, seed quality and crop management.
Pest & disease considerations
Advantages & considerations
Things to consider
- Corrected 2026-08-15: a directly-fetched technical presentation and a peer-reviewed genome-sequencing paper both report fibre yield of roughly 32–40 q/ha (3.4–3.6 t/ha), above this record's old "25–28 q/ha" yieldPotential — yieldPotential corrected to "32–40 q/ha".
- Corrected 2026-08-15: sourced material specifies root rot as the resistance (not stem rot as this record's diseaseResistance field previously stated) and adds yellow-mite tolerance as a separate, additional trait — diseaseResistance corrected to name root-rot resistance (fixing what was a factual name error) and to mention yellow-mite tolerance.
- CRIJAF's own domain and the AICRP jute-network site were both unreachable this phase (DNS failure), same as the other jute records this phase — all facts rest on a directly-fetched technical presentation plus independently corroborated WebSearch/PubMed hits, not a directly-read CRIJAF release document.
Suitable regions
States this variety is recommended for — check locally, since a state can have more than one recommended zone.
- West Bengal
- Bihar
- Assam
Frequently asked questions
Who released JRO-524 (Navin) and when?
ICAR-CRIJAF, Barrackpore, released it in 1977, bred from the cross Sudan Green × JRO 632.
Why is JRO-524 (Navin) the most widely grown tossa jute variety?
It combines non-shattering pods, resistance to premature flowering under mid-March sowing, low susceptibility to yellow mite, and root-rot resistance in high-rainfall conditions — a well-rounded package that has made it the dominant tossa variety; it is significant enough to have had its own draft genome separately sequenced and published.
Can JRO-524 be sown early without bolting?
Yes — sowing as early as mid-March does not induce premature flowering, a genuine bred-in trait rather than just general tossa-jute behaviour.
How much fibre yield does JRO-524 give?
A directly-fetched technical presentation and a peer-reviewed genome paper both report roughly 32–40 q/ha — this record's yieldPotential field was corrected to that range.
Is JRO-524 resistant to yellow mite?
Sourced field reports describe it as least susceptible to yellow mite among common tossa jute varieties — this record's diseaseResistance field was corrected to name that trait, alongside root-rot resistance (previously miscast as stem-rot resistance).