Two new vegetable varieties from the Indian Agricultural Research Institute show what self-reliance in horticulture means in practice: seed that can be produced at home, and resistance bred into the plant instead of sprayed onto it.
Self-reliance in agriculture is usually discussed in terms of tonnes of grain. In vegetables it comes down to something less visible: who controls the seed, and how much chemical protection a crop needs to reach the market. The September–October issue of Indian Horticulture, published by the Indian Council of Agricultural Research, opens with two varieties from the Indian Agricultural Research Institute in New Delhi that address those two questions directly. One is a purple broccoli bred to flower and set seed in the northern plains. The other is a sponge gourd resistant to a virus that has made the crop a gamble in the rainy season.
Why broccoli seed was a problem
Broccoli is a newcomer to Indian fields, and a temperate one. The plant forms its head in cool weather and then needs a prolonged period of low temperature before it will flower and produce seed. In India that requirement is met reliably only in the hills, so seed production has been confined to places such as the Kullu valley, or the seed has simply been imported, much of it as expensive hybrids. Farmers in the plains could grow broccoli but could not multiply it.
Pusa Purple Broccoli-1 is designed to break that dependence. Described by its breeders, Pritam Kalia, Shrawan Singh and colleagues, as the country’s first short-duration, subtropical purple heading broccoli, it was developed by repeated selection from segregating exotic material. It is ready for harvest 75 to 85 days after transplanting, and under Delhi conditions it flowers in January and February and sets seed abundantly. In practical terms, a seed grower in the plains of north India can now produce broccoli seed locally.
Colour with a purpose
The purple head is more than a novelty. The colour comes from anthocyanins, the pigments that also colour black carrot, purple cabbage and jamun. The breeders report an anthocyanin content of about 30 milligrams per 100 grams of fresh head, alongside glucoraphanin, the sulphur-containing compound for which broccoli is nutritionally known. Both classes of compound are studied for antioxidant and protective effects, though it would be wrong to present any vegetable as a medicine.
On the agronomic side, the heads are compact and average 500 to 600 grams. Over five seasons of testing at the institute, from 2019-20 to 2023-24, the variety averaged about 20.5 tonnes of marketable heads per hectare, roughly 43 per cent more than the check variety Pusa KTS-1. Its early maturity extends availability in the market from December to March, and its medium stature allows closer planting. The institute also points to uses as sprouts and microgreens. The variety is recommended for the National Capital Region.
A gourd that survives the monsoon
Sponge gourd, known as ghia tori or nenua across north India, is a staple summer and rainy-season vegetable. Its nemesis is the Tomato Leaf Curl New Delhi Virus, which despite its name attacks a wide range of cucurbits. The virus is carried by the whitefly, an insect whose numbers surge in warm, humid weather. Infected plants develop curled, mottled leaves and stunted vines, and yield little. In bad years, kharif crops have been lost almost entirely. Farmers respond with repeated insecticide sprays against the whitefly, which raise costs, leave residues and encourage resistance in the insect.
Pusa Sponge Gourd-29, also designated DSG-29, is presented by A.D. Munshi and colleagues as the first sponge gourd variety from the public sector with resistance to this virus. In open-field trials at the institute during the kharif seasons of 2022, 2023 and 2024 it yielded 18.5, 18.2 and 16.6 tonnes per hectare, an average of 17.77 tonnes. That was about 31 per cent more than the resistant check DSG-6 and several times the yield of the susceptible variety Pusa Supriya under disease pressure. On the vulnerability index that plant pathologists use to score disease severity, it recorded 8.9 against 85.3 for the susceptible check. The first picking comes 45 to 50 days after sowing. The variety has been notified for the National Capital Territory of Delhi.
What self-reliance means here
Three threads tie these releases to the issue’s theme. The first is seed sovereignty. India’s vegetable seed market is dominated by private hybrids, many with foreign parentage, which must be bought afresh each season. Open-pollinated public varieties such as these allow farmers and seed producers, including the National Seeds Corporation and farmer producer organisations, to multiply seed at low cost.
The second is protection through genetics. Host resistance is the cheapest and cleanest form of plant protection, particularly for a vegetable picked every few days, where pesticide waiting periods are hard to observe.
The third is nutrition. Coloured vegetables rich in pigments add diversity to diets, and the institute has built a portfolio of them, including purple cauliflower, red cabbage and carotene-rich cauliflower.
Notes of caution
New varieties earn their reputation in farmers’ fields, not in release proposals. The data cited come from trials at a single location, the institute’s farm in New Delhi, and both varieties are recommended or notified for the Delhi region only. Performance in other agro-climatic zones will need multi-location testing before wider recommendation.
Resistance is also rarely permanent. Viruses evolve, and whitefly populations shift; a variety that holds today may be overcome within some years, which is why breeders stack several resistance sources and why monitoring matters.
The practical bottleneck is seed. A variety that exists only at a research institute changes nothing. Reaching farmers requires breeder seed to be multiplied through public agencies and licensed private companies, and demonstrated through Krishi Vigyan Kendras.
The larger picture
India is the world’s second-largest producer of vegetables, yet its yields and seed systems leave room for improvement. Varieties adapted to local climates, resistant to local diseases and reproducible by local growers are how the gap closes. A broccoli that completes its life cycle in the plains and a gourd that withstands a monsoon virus are small, concrete instances of that principle.
– M U V Ramesh
