Fennel variety · Released variety
Co-1
Also known as CO-1, TNAU Co-1
Tamil Nadu Agricultural University (TNAU), Coimbatore · TNAU, Coimbatore
Medium-tall cultivar with diffused branching. Notable for adaptation to diverse soil and water conditions—tolerates drought, waterlogging, salinity, and alkalinity. Suitable for hilly terrain cultivation and rainfed areas.
Key facts
| Type | Released variety |
|---|---|
| Origin | Tamil Nadu Agricultural University (TNAU), Coimbatore |
| Breeder / source | TNAU, Coimbatore |
| Parentage | TNAU germplasm selection, derived through reselection from PF-35 |
| Yield | 5.75 quintals/ha |
| Tolerance | Drought, waterlogging, salinity, alkalinity |
| Distinctive features | Medium tall, diffused branching, matures in 225 days, tolerant to multiple stresses |
| Grown in | Tamil Nadu, Southern India |
| Also known as | CO-1, TNAU Co-1 |
Figures are indicative, compiled from public agricultural sources (ICAR institutes, State Agricultural Universities, the Spices Board and the National Innovation Foundation) and vary with soil, season and management. Confirm with your local package of practices.
Co-1 in detail
A stress-tolerant medium-tall fennel from Tamil Nadu Agricultural University, suited to rainfed farming and difficult soils where other varieties struggle.
Origin & story
Co-1 was developed by Tamil Nadu Agricultural University (TNAU) at Coimbatore. The "Co" prefix in TNAU variety nomenclature reflects development at the Coimbatore station. The specific year of release and the breeders involved are not documented in accessible sources.
How it grows
Matures in about 225 days. Plants are medium-tall with diffused (spreading) branching. The variety is noted for adaptation to diverse soil and water conditions, tolerating drought, waterlogging, salinity and alkalinity, and is reported as suitable for hilly terrain and rainfed areas. This makes it a practical choice for marginal land, poorly drained sites and saline tracts where many fennels do poorly. Specific recommended sowing/harvest windows and per-hectare yield figures for Co-1 are not documented in accessible sources.
Quality & character
Medium-tall plant habit with diffused (spreading) branching. No specific data on seed size, colour, or volatile oil content have been located in public documentation.
Why it matters to buyers
Co-1's appeal rests on agronomic versatility rather than premium seed traits. Growers in saline-affected, waterlogged or hilly areas favour it for reliable cropping where higher-yielding varieties struggle, so it tends to be a choice driven by soil and climate constraints rather than maximum productivity. Reliable comparative yield figures versus other fennel varieties were not found in accessible sources.
About fennel
Fennel (Foeniculum vulgare) has been cultivated across India for centuries, particularly in the arid and semi-arid regions of Gujarat and Rajasthan, which together account for approximately 90-96% of national production. From traditional landraces to modern released varieties bred by ICAR institutes and state agricultural universities, Indian fennel…
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