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Category — GS Paper 3 ///Published — 2026-04-24 ///Exam — Both Prelims and Mains ///Tags — Achievements of Indians in Science & Technology, GS Paper 3, Quick Facts For Prelims ///Category — GS Paper 3 ///Published — 2026-04-24 ///Exam — Both Prelims and Mains ///Tags — Achievements of Indians in Science & Technology, GS Paper 3, Quick Facts For Prelims ///

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Genetic Study Rewrites Jamun's Evolution, India as Origin Centre

A recent study has revised the evolutionary history of Jamun (Syzygium), showing it originated around 80 million years ago in East Gondwana with India as the major centre of early diversification. This contradicts the earlier belief of Australian/Southeast Asian origin (51 million years ago). The study used Miocene fossils (~20 million years old) from the Kasauli Formation in Himachal Pradesh to establish Syzygium paleosalicifolium, indicating the genus spread from India to Southeast Asia and Australia.

2026-04-24

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Key Findings: Revised Evolutionary Timeline

Origin and Diversification

Previous Belief: Jamun (Syzygium genus) originated in Australia or Southeast Asia ~51 million years ago
New Finding: Genus Syzygium originated ~80 million years ago in East Gondwana
India's Role: Identified as the major centre of early diversification
Dispersal Pattern: Genus spread from India to Southeast Asia and Australia

Fossil Evidence

Location: Kasauli Formation, Himachal Pradesh
Age: Miocene fossils, approximately 20 million years old
Specimens: 11 fossil leaves identified
Species Discovered: Syzygium paleosalicifolium
Indian Fossil Record: 55–20 million years ago indicates continuous presence in India

About Jamun (Syzygium cumini)

Scientific Classification

Family: Myrtaceae (Myrtle family)
Genus: Syzygium
Common Names: Indian blackberry, black plum, Java plum

Distribution

Widely found in India, Southeast Asia, and tropical regions
Grows in moist deciduous and riverine ecosystems

Nutritional Value

Rich in iron
High in antioxidants
Contains vitamin C
Contains anthocyanins
Beneficial for immunity and metabolic health

Significance

Medicinal: Important in Ayurveda, particularly for diabetes management
Economic: Value in food processing industry
Ecological: Keystone species supporting pollinators and seed dispersal

Geopolitical Context

India emerges as the centre of origin for Syzygium genus
Revises earlier biogeographic theories about Gondwanan distribution patterns
Strong fossil evidence from Indian subcontinent validates the revised timeline
Challenges the Australian origin hypothesis for the genus