Sweet potatoFamily: Convolvulaceae.Genus: Ipomoea (approx. 50 genera & 400 species)Botanical name: I. batatas

General botany Perennial crop, but treated as annual when cultivated.The plant has trailing and twining stems and containing latex. Tuber is rich in carbohydrate, vit. A and C.

Variation among cultivars

Cultivars differ in: 1.Colour of root skin 2.Colour of the flesh3.Shape of the roots4.Shapes of the leaf5.Depth of rooting6.Time of maturity7.Resistance to diseases8.Texture of cooking roots

What make skin and flesh colour different

• The phytochemicalsPhenolic compoundscarotenoidsanthocyninstocopherols

The history

The oldest remains was found in Peru: 8,000-10,00 yr old.

This indicates primary center of origin is in central to south America

The second center of origin is thought to be in Papua New Guinea, based on genetic distinctiveness

How sweet potatoes reach Asia

The Spanish and the Portuguese

The sweet facts

• As an emergency food crop.• 80% (in term of acreage) is grown in Asia and

15% in Africa.• Yield per ha, China and Japan produce 20-25

t/ha. Only Egypt produce up to 30 t/ha.• Asians are the main consumer of sweet

potatoes

World production

World ranking1.China (85% of world production)

2.Nigeria3.Uganda

4.Indonesia5.Vietnam

Environment suitable for cultivation

Best in sandy loam soilOptimum temp approx 24oC 75-100 cm of rainfall per annum (esp. during

planting)

Sweet potato varieties

Few varieties developed by MARDI are found or planted locally;Gendut for fries or chipsJaloMas and Telong for flour use in food product

VitAto with high beta carotene content

However, hundreds of accessions are reported and found locally in the country.

Uses

Staple food in some countries e.g. Papua New Guinea

Confectionaryprocessed as staple – chips and canned.

Health benefits of sweet potato

High-Fiber BenefitsSweet potatoes are a fiber-rich food that promotes healthy digestion.

Health benefits of sweet potato …cont

Antioxidant Benefits

As an antioxidant-rich food, sweet potatoes hinder the destructive action of free radicals.

Health benefits of sweet potato …cont

Blood Glucose Control

Sweet potatoes are an ideal food for people with diabetes, to keep blood glucose levels stable and prevent health complications.

Uses …. cont

Industrial use flour, sauce, pasta, glucose, syrup,

alcohol, lactic acid, pectin.

Any questions

Tips Penanaman Ubi Keledek

http://animhosnan.blogspot.com/2010/06/keledek.html

Thank you