Nutmeg variety · Botanical type
Hermaphrodite / Bisexual Forms
Also known as Hermaphroditic trees; Rare fruiting males
Sporadic occurrence in Kerala homesteads and commercial plantings · Natural occurrence in Myristica fragrans; selected when identified
Self-fertile trees; eliminates need for separate male pollinators; single tree can set fruit. Approximately 5% of seed-raised populations; valuable in breeding programmes.
Key facts
| Type | Botanical type |
|---|---|
| Origin | Sporadic occurrence in Kerala homesteads and commercial plantings |
| Breeder / source | Natural occurrence in Myristica fragrans; selected when identified |
| Parentage | Natural mutation or rare genetic form; reproduced vegetatively when identified as bearing both male and female flowers |
| Yield | Comparable to female trees when well-managed; reported in some IISR and KAU breeding lines |
| Tolerance | Varies; some hermaphrodite forms show good disease tolerance and yield |
| Distinctive features | Produces both male and female flowers on same tree; fruit-bearing; self-compatible; used in IISR and KAU breeding as scion material; pollen viability 79.74% in hermaphrodite flowers |
| Grown in | Not geographically localized; recorded sporadically in breeding programmes at IISR and KAU |
| Also known as | Hermaphroditic trees; Rare fruiting males |
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.
Hermaphrodite / Bisexual Forms in detail
Rare self-fertile trees bearing both male and female flowers on a single canopy, eliminating the need for separate pollinators and allowing fruit production from a single plant.
Origin & story
Natural occurrence in Myristica fragrans populations, identified sporadically in Kerala homesteads and commercial plantings, and selected when detected by breeders. Around 5% of seed-raised populations show hermaphrodite or bisexual characteristics; in an IISR Calicut study of 100 accessions, sex segregation followed a 40:45:5 ratio for male, female and bisexual types respectively. Konkan Sugandha, developed by Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth (Fruit Research Station, Vengurla), is the only released hermaphrodite variety.
How it grows
Found sporadically in Kerala homesteads and some commercial plantings. Hermaphrodite trees can fruit without cross-pollination from male trees, a useful advantage in plantation design, and are used as scion material in grafting programmes at IISR and KAU for breeding and clonal propagation. By age 15, Konkan Sugandha bears around 526 fruits per tree (about 2.63 kg dry nut yield), with individual seed weight around 5 g and mace weight around 1.2 g.
Quality & character
Produces both pistillate (female) and staminate (male) flowers on the same tree, with occasional hermaphrodite flowers whose androecium ranges from 1 to 4 anthers as fused or free filaments. Hermaphrodite flowers are self-compatible and can set fruit. Pollen viability in hermaphrodite flowers is 79.74%, lower than in male flowers (90.77%) but still adequate. Within monoecious trees, hermaphrodite flowers occur at a frequency of 0 to 10%.
Why it matters to buyers
Valuable to growers and breeders seeking to reduce orchard space lost to unproductive male trees. A single hermaphrodite tree can supply its own pollen, lowering plantation costs and simplifying management, which appeals to programmes aiming to overcome the sex-segregation problem inherent in seed-raised populations. Availability as scion material is limited; Konkan Sugandha and IISR-identified clones are propagated through grafting. Higher propagation cost is offset by yield security and space efficiency over the long term.
About nutmeg
Nutmeg in India's Western Ghats is no ancient crop—it arrived on colonial spice ships and made its quiet home in Kerala's shaded homesteads over the past three centuries. Today, where farmers once relied on seedlings of mixed sex and uncertain character, ICAR-IISR in Kozhikode has released proven female clones and farmer-tested selections that turn an…
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