The Vanishing Orchard: Genetic Erosion and the Battle to Save India’s Agricultural Heritage

In the mid-1970s, in a quiet front yard in Thrissur, Kerala, a sprawling native mango tree stood as a testament to the region’s rich botanical heritage. To a retired government servant and his family, it was a source of seasonal bounty: tender mangoes for pickles and ripened, fibrous fruits for sweet curries. To the neighborhood, however, it was a "global common"—a public resource that invited stones from local youngsters. When the casualties of this informal harvest became too many broken roof tiles to afford, the tree was felled.

This domestic tragedy is a microcosm of a much larger, quieter extinction occurring across the Indian subcontinent. As native landraces—locally adapted varieties developed over centuries—disappear from homestead gardens, they are being replaced by a handful of high-yielding, market-friendly varieties. This shift, while initially driven by the noble goal of food security, has created a precarious genetic monoculture that may leave India vulnerable in an era of climate instability.

The Main Facts: The Decline of the Homestead Garden

The disappearance of native varieties like the Chandrakaran or the Tholikayappan (literally "bitter-skinned mango") is not merely a loss of flavor; it is a loss of genetic "insurance." For decades, the agricultural landscape of Kerala and broader India was defined by "homestead gardens"—diverse, multi-tiered ecosystems where food crops were grown alongside medicinal plants and timber.

Today, these gardens are being sterilized. Agricultural universities and market demands favor a narrow selection of varieties that prioritize shelf-life, uniform size, and high yield over resilience and nutritional diversity. According to data from international research networks, while thousands of varieties of rice, mango, and millets once flourished across India’s diverse agro-climatic zones, only a fraction remain in active cultivation.

The erosion of these landraces is a global phenomenon. It is estimated that since the beginning of the 20th century, about 75% of plant genetic diversity has been lost as farmers worldwide have abandoned their multiple local varieties and landraces for genetically uniform, high-yielding varieties.

Chronology: From the Green Revolution to the "Doomsday Vault"

To understand how India reached this point, one must look at the post-World War II era.

• The 1960s: The Productivity Push. Following the Second World War, a burgeoning global population faced the threat of mass starvation. This led to the Green Revolution, spearheaded by Nobel laureate Norman Borlaug. In India, the mid-1960s saw the introduction of high-yielding varieties of wheat and rice.
• The 1970s: Institutionalization. Organizations like the International Maize and Wheat Improvement Center (CIMMYT) in Mexico and the International Rice Research Institute (IRRI) in the Philippines became the backbone of global food security. Their research focused on a few "amenable" varieties that responded well to chemical fertilizers and irrigation.
• 1992: The Sovereign Shift. Before 1992, seeds were largely viewed as "global commons." The United Nations Convention on Biological Diversity (CBD) changed this, declaring biological resources as the sovereign property of nations. This mandated that any access to genetic resources must involve the "equitable sharing of benefits."
• 2001–2008: Preservation Efforts. In 2001, the International Treaty on Plant Genetic Resources for Food and Agriculture was adopted to manage the 700,000 accessions held in trust globally. In 2008, the Svalbard Global Seed Vault—nicknamed the "Doomsday Vault"—was opened in the Arctic Circle to provide a fail-safe backup for the world’s seeds.
• 2017–2025: Climate and Policy Collisions. In 2017, the Svalbard vault faced its first major threat when melting permafrost flooded its entrance, highlighting the irony that even our "backups" are vulnerable to the climate crisis. By late 2025, India introduced a controversial new Seed Bill, sparking a debate over the balance between corporate interests and farmer rights.

Supporting Data: The Cold Storage of Biodiversity

As native varieties vanished from the fields, they were moved into ex situ conservation—genebanks where seeds are frozen at -20 degrees Celsius.

India’s National Bureau of Plant Genetic Resources (NBPGR) houses one of the world’s largest collections. Globally, the Consultative Group on International Agricultural Research (CGIAR) maintains a network of genebanks that hold over 700,000 samples of crops and their wild relatives.

However, storage is not without risk. The International Centre for Agricultural Research in Dry Areas (ICARDA) in Aleppo, Syria, saw its genebank severely damaged during the country’s civil war. While most accessions were duplicated in Svalbard, the loss of the "living laboratory" in Aleppo was a blow to agricultural research.

Furthermore, the data suggests a growing gap in "In Situ" (on-site) conservation. While genebanks preserve the DNA, they do not preserve the traditional knowledge of how to grow, harvest, and cook these crops. Without the associated cultural context, a seed is merely a biological artifact.

Official Responses: Policy, Equity, and the "Ease of Doing Business"

The Indian government’s response to the loss of biodiversity has been a mix of pioneering legislation and controversial implementation. India was one of the first countries to enact a Biological Diversity Act (2002), which aimed to protect traditional knowledge and ensure benefit-sharing.

However, critics argue that the focus has shifted. A recent report from the National Biodiversity Authority (NBA) has been lauded for promoting the "ease of doing business" rather than the protection of conservator communities. In many cases, companies using local biological resources pay as little as 0.5% of their earnings back to the community—a figure many activists describe as "tokenism."

The draft Seed Bill of 2025 has further polarized the sector. While the government claims the bill will ensure "quality control" and modernize the seed trade, critics argue it is "seed industry friendly" rather than "farmer-friendly." The bill simplifies the process for commercial entities to register varieties but places new hurdles on the traditional exchange of seeds between farmers—a practice that has been the cornerstone of biodiversity for millennia.

Implications: Resilience in a Changing Climate

The loss of native varieties is not just a sentimental concern for historians; it is a direct threat to food security in the face of climate change.

1. The Climate Syllabus
Every year, the Indian farmer faces a "new syllabus" of environmental stresses: unseasonal heatwaves, shifting monsoons, and unprecedented frost. High-yielding varieties are often "brittle"—they perform exceptionally well under perfect conditions but fail catastrophically under stress. Native landraces, like the Chandrakaran mango or salt-tolerant rice varieties from the Sundarbans, have evolved to survive local extremes.

2. The Role of Traditional Knowledge
New initiatives are attempting to bridge the gap between technology and tradition. One such group, Karya, is using AI to document 10 lesser-known Indian languages—including Sadri, Santhali, and Khasi—to record local recipes and crop uses. Their book, From Hands that Feed, lists 314 Indigenous contributors, documenting how local "weeds," fruits, and insects (like red ants) provide essential nutrition. This "digital conservation" ensures that when a variety is brought back from a genebank, the knowledge of how to use it isn’t lost.

3. Economic Connect and GI Tags
The success of the Kadaknath chicken—a native black fowl from Madhya Pradesh—provides a roadmap for the future. By obtaining a Geographical Indicator (GI) tag in 2018, the community protected its traditional knowledge and created a premium market for the bird. Similar efforts are underway for the traditional seeds of Wayanad and the Monpa community’s culinary heritage in Arunachal Pradesh.

Conclusion: The Path Forward

The Indian farmer of the 21st century needs an expansive "armoury" of seeds. The molecular methods of modern laboratories are powerful, but they often lag behind the rapid shifts in local micro-climates. The most robust defense against a warming world lies in the very diversity that is currently being pruned away.

The urban middle class, which has increasingly dictated policy since the 1990s, now holds the key. As consumers move toward "local" and "sustainable" produce, they create the economic incentive for farmers to maintain diverse homesteads. If the Chandrakaran mango is to survive, it cannot just exist as a frozen sample in a vault or a memory in a Thrissur front yard; it must have a place on the Indian table. Saving biodiversity is no longer just the work of scientists in white coats; it is the collective responsibility of a society that must learn to value the "bitter skin" of the native fruit as much as the uniform sweetness of the industrial one.