Biotechnology in Agriculture: Enhancing Crop Yields and Sustainability

The world will need to produce far more food in the coming decades, and the pressure on agriculture is only growing. Land is finite, water is scarce, and the climate is becoming less predictable. Against this backdrop, biotechnology has moved from laboratory curiosity to a working tool on farms, in dairies, and in fish ponds. By editing the genetic instructions of crops and animals, scientists can raise yields, reduce pesticide use, and protect harvests from pests and spoilage. This post explains how agricultural biotechnology works, looks at landmark examples like Bt cotton and the long-shelf-life tomato, and examines its expanding role in animal husbandry and fish farming.

What biotechnology means in agriculture 🔗

Agricultural biotechnology is the use of scientific techniques to modify living organisms, or parts of them, to improve crops and livestock. The most well-known branch is genetic modification, where a specific gene is inserted, removed, or silenced to give a plant or animal a useful trait. Other techniques include tissue culture, molecular markers that help breeders select desirable animals, and genomics that maps an organism’s entire genetic blueprint.

The goal is straightforward: get more output from the same or fewer resources. A crop that resists insects needs less spraying. A tomato that ripens slowly wastes less in transit. A dairy cow bred with the help of genetic selection produces more milk. These gains matter especially in a country where two-thirds of the rural population depends on farming and livestock for their livelihoods, and where pressure to feed a large and growing population is constant.

Bt cotton: the flagship GM crop 🔗

Bt cotton is the single most important example of genetic modification in Indian farming, and the only GM crop approved for commercial cultivation here. The “Bt” comes from Bacillus thuringiensis, a soil bacterium that naturally produces a protein toxic to certain insects. Scientists inserted the gene responsible for this protein into cotton plants. The result is a cotton variety that produces its own defence against bollworms, the pests that historically devastated cotton crops.

The Genetic Engineering Approval Committee approved Bt cotton for commercial cultivation in 2002 in western and southern India. Adoption was remarkably fast. By 2018, roughly 95% of cotton farmers had switched to Bt varieties, an uptake rate described as unmatched in agricultural history.

Why farmers adopted it so quickly 🔗

The early benefits were substantial. Research drawing on panel data from over 500 cotton farms across four states found that Bt cotton adoption raised cotton yields by 24%, lifted farmers’ profits by 50%, and improved household living standards by 18%. The same data showed chemical insecticide use fell by more than 40%, which lowered both costs and the health and environmental risks tied to heavy spraying.

It is worth being precise about how Bt cotton works. Bt cotton is not itself a yield-enhancing technology; rather, it protects the yield potential of a variety from pest damage. In other words, it does not make the plant inherently more productive, but it stops pests from destroying the harvest the plant would otherwise deliver.

The ongoing debate 🔗

The story is not entirely one of unbroken success, and a good student of sustainability should understand the criticisms. A study examining the most recent decade of cultivation found that Bt cotton yields have stagnated, had a negligible effect on profits, and grown more sensitive to pest pressure compared with the early years. The pink bollworm has developed resistance to the toxin in many areas, and sucking pests that the Bt protein does not target have become more troublesome.

There are also concerns around the seed itself. The hybrid technology prevents farmers from saving seed, so they must purchase high-cost seed every year. This raises questions about cost, dependence on seed companies, and who ultimately captures the benefits of the technology. The lesson for sustainable development is that a single technological fix rarely solves an agricultural problem permanently. Pests evolve, and management practices must evolve with them.

The long-shelf-life tomato: engineering against spoilage 🔗

Not every application of biotechnology targets pests. One of the earliest aimed to fight a different enemy: spoilage. The Flavr Savr tomato, developed by the American company Calgene, was the first commercial genetically engineered crop approved for human consumption, reaching the market in 1994.

Ripe tomatoes soften quickly because an enzyme called polygalacturonase breaks down the pectin in their cell walls. Scientists used a technique called antisense suppression to switch off the gene that produces this enzyme. With the enzyme suppressed, the tomato could ripen on the vine for better flavour while staying firm long enough to survive shipping and storage. The promise was clear: less waste, longer shelf life, and tomatoes that tasted of something.

A commercial failure with a lasting legacy 🔗

The Flavr Savr did not last. It disappeared from shelves within about three years. The science worked, but the business did not: the tomato was more expensive than its competitors and did not taste dramatically better, and the company struggled with the costs of production and distribution.

Yet its influence endured. The Flavr Savr proved that genetic engineering could deliberately alter a specific plant trait, and it shaped the regulatory framework that later crops would follow. Its failure also taught a crucial lesson, namely that most successful GM crops that followed focused on traits that benefited farmers directly, such as insect resistance and herbicide tolerance, rather than on consumer-facing qualities. The link to sustainability is direct: reducing post-harvest losses means less wasted water, fertiliser, and labour for every tomato that actually gets eaten.

Biotechnology in animal husbandry 🔗

Livestock is central to the rural economy, contributing close to 5 percent of GDP and roughly a quarter of agricultural GDP, while supporting the livelihoods of small and marginal farmers. The challenge is productivity. Livestock in India and China together make up a large share of the world’s animal population, yet contribute a much smaller share of global farm produce, which points to significant room for improvement.

Biotechnology helps close this gap through several routes. Molecular markers and genomics allow breeders to identify animals with desirable traits, such as higher milk yield or disease resistance, far more accurately than observation alone. The Department of Biotechnology supports research in animal reproduction, transgenic animals, and genetic improvement to raise livestock production and productivity.

Reproductive technologies in dairy 🔗

Reproductive biotechnology has become a practical tool for improving cattle herds. The government has promoted sex-sorted semen technology and in-vitro fertilisation under the Rashtriya Gokul Mission to accelerate breed improvement. Sex-sorted semen allows farmers to produce a higher proportion of female calves, which is valuable in dairy farming where milk-producing cows are the goal. This is biotechnology working quietly in the background, multiplying the genetic gains of the best animals across many farms.

In poultry, similar principles apply. India is among the world’s largest producers of eggs and a major producer of poultry meat, and combining conventional breeding with molecular approaches can improve birds rapidly and sustainably, helping the sector cope with challenges including climate stress.

Pisciculture and aquaculture 🔗

Pisciculture, the rearing of fish for food, is a growing part of the animal husbandry sector and an important source of protein. As demand for fish rises, biotechnology contributes through selective breeding for faster-growing and disease-resistant fish, improved feed, better diagnosis of diseases, and management of water quality in ponds and tanks.

The sustainability angle is significant. Well-managed aquaculture can produce protein efficiently compared with some forms of land-based livestock, and disease-resistant stock reduces losses that would otherwise waste feed, water, and effort. Biotechnology applied here helps meet rising protein demand without expanding the footprint of fishing on wild stocks.

Weighing the benefits against the risks 🔗

Agricultural biotechnology offers real advantages for sustainability. It can raise output per unit of land, cut pesticide and resource use, and reduce losses to pests and spoilage. These are not abstract benefits; they translate into higher incomes for farmers and lower environmental pressure.

But the technology carries genuine concerns that responsible policy must address. Pests evolve resistance, as the pink bollworm did with Bt cotton, which means the gains can erode over time. There are worries about controversies surrounding impact and barriers to broader adoption, about farmers’ dependence on commercial seed, about effects on biodiversity, and about transparency and consumer choice. A sustainable approach treats biotechnology as one tool among many, integrated with sound agronomy, fair regulation, and attention to the farmers who actually use it, rather than as a standalone solution.

What do you think? Should a country prioritise high-yield genetically modified crops to meet its food needs, even when the long-term benefits like those seen with Bt cotton may fade over time? And where should the line be drawn between the productivity gains of agricultural biotechnology and concerns about farmers’ dependence on commercial seed?

References

1. https://www.sciencedirect.com/science/article/abs/pii/S0959652621017935
2. https://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=18385
3. https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2023.1102395/full
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC10499354/
5. https://www.ncbi.nlm.nih.gov/books/NBK424540/
6. https://www.nongmoproject.org/blog/new-gmo-alert-gmo-tomatoes-are-back-in-fashion/
7. https://www.smsfoundation.org/state-of-animal-husbandry-in-india/
8. https://dbtindia.gov.in/livestock-and-animal-biotechnology-0
9. https://www.pib.gov.in/PressReleasePage.aspx?PRID=2149835
10. https://link.springer.com/article/10.1007/s40011-014-0306-y