Mace variety · Regional type
Keralashree Elite Seedling Landraces
Also known as KAU-farmer varieties (multiple), superior mother trees, PVS-selected clones
Across Kerala nutmeg-growing regions (Thrissur, Ernakulam, Kottayam); identified via Participatory Varietal Selection (PVS) surveys · Farmer-maintained landraces; identified and characterized by Kerala Agricultural University (KAU) · Surveyed 2010–2014; five varieties released as KAU-farmer varieties (exact years not specified in available literature)
PVS approach identified five superior clones from 29 mother trees based on economic yield traits (nut size, mace thickness, fruit number). Diversity reflects century-long farmer selection across Kerala's varied microclimates.
Key facts
| Type | Regional type |
|---|---|
| Origin | Across Kerala nutmeg-growing regions (Thrissur, Ernakulam, Kottayam); identified via Participatory Varietal Selection (PVS) surveys |
| Breeder / source | Farmer-maintained landraces; identified and characterized by Kerala Agricultural University (KAU) |
| Year released | Surveyed 2010–2014; five varieties released as KAU-farmer varieties (exact years not specified in available literature) |
| Parentage | Local Kerala open-pollinated populations; mother tree characterization over 4 years identified 29 superior accessions |
| Yield | Variable; characterized clones selected for superior yield traits. Fruits per tree ranged 628–2250 per year; dry nut weight 3.27–15.37g; dry mace weight 0.35–4.80g depending on accession |
| Tolerance | Adapted to local Kerala growing conditions; specific disease tolerance profiles not detailed |
| Distinctive features | Variation in nut size, mace thickness, and yield; bold nuts noted in superior selections. Pure female, prolific flowering. Mace thickness and coverage key selection criteria. Oils rich in sabinene and myrcene with low myristicin and elemicin. |
| Grown in | Thrissur, Ernakulam, Kottayam districts, Kerala |
| Also known as | KAU-farmer varieties (multiple), superior mother trees, PVS-selected clones |
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.
Keralashree Elite Seedling Landraces in detail
Keralashree refers to farmer-maintained nutmeg landraces from Kerala's nutmeg belt, identified and characterized through participatory selection of superior mother trees rather than a single conventional breeding programme.
Origin & story
Between 2010 and 2014, Kerala Agricultural University surveyed nutmeg-growing regions across Thrissur, Ernakulam, and Kottayam districts, using Participatory Varietal Selection (PVS) to identify superior trees from 29 candidate accessions. From this work, five varieties were released as KAU-farmer's varieties based on economic yield traits such as nut size, mace thickness, and fruit number. The material reflects a century of farmer selection across Kerala's varied microclimates rather than a single breeding line.
How it grows
The selected landraces are pure female with prolific flowering. Mace thickness and coverage were among the primary selection criteria. Across the surveyed trees, dry nut weight ranged from 3.27 to 15.37 g, dry mace weight from 0.35 to 4.80 g, and fruit counts from 628 to 2250 per tree per year. The study reported high heritability and genetic advance for dry mace weight (76.30%), dry kernel weight (71.37%), and fruit number per tree (73.24%), indicating these traits respond well to simple farmer selection. Suited to tropical moist, humid conditions.
Quality & character
Bold nuts with thick, entire, dark red mace — mace thickness and coverage were key selection criteria. Across the surveyed material, volatile oil in mace ranged 3.31–16.97% and oleoresin 13.00–30.50%. The oils are characteristically rich in sabinene and myrcene, with notably low myristicin and elemicin.
Why it matters to buyers
The low myristicin and elemicin alongside high sabinene and myrcene give these oils a distinctive aromatic profile for buyers seeking specific compositions. Thick, well-covering mace appeals to premium domestic and export buyers. Pure female, prolific flowering supports consistent cropping.
About mace
Mace—the lacy, crimson-to-gold aril wrapped around the nutmeg seed—comes from the same tree as nutmeg and matures in India where Kerala's humid coastal belt has cultivated it for centuries. Below are the principal Indian varieties and botanical types: released cultivars from ICAR institutes, farmer-bred selections gaining official recognition, and regional…
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