Saving Seeds of Onion

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Onion, Allium cepa, is one of the most widely cultivated vegetables in the world. Onion forms its bulb in the first year and produces seed in the second year. Temperatures around 20–22 °C favor vegetative growth while temperatures around 12 °C favor seed stalk formation. Onion flowering is sensitive to daylength—for most varieties grown in the tropics, short days are conducive to seed production. One bulb can produce 20 or more stalks and may be in bloom for over 30 days. Onion produces perfect flowers, most of which are crosspollinated. Two methods of producing seed are used

Sutevee Sukprakarn
Sunanta Juntakool
Rukui Huang
Tom Kalb
AVRDC – The World Vegetable Center