BREEDING
METHODS AND
ACHEIVEMENT IN
VEGETATIVELY
PROPOGATED
CROPS

CONTENT
• 1 POTATO
• 2 SWEET POTATO
• 3 CASSAVA
• 4 COLOCASSIA
• 5 ELEPHANT FOOT YAM
• 6 ARTICHOKES
Presentation title 2

POTATO
SOLANUM TUBEROSUM
FAMILY- SOLANACEAE
CHROMOSOME NO.- 2n = 48
ORIGIN- SOUTH AMERICA
COMMON NAME- KING OF VEGETABLES, 2ND
FOOD OF THE WORLD
Presentation title 3

BREEDING METHODS OF
POTATO
1. HYBRIDIZATION AND SELECTION
2. BACK CROSS METHOD
3. PROPOGATION- TUBERS

SWEET POTATO
5
IPOMEA BATATAS
• FAMILY- CONVOLVULACEAE
• CHROMOSOME NO. = 2n= 6x = 90
• ORIGIN= CENTRAL SOUTH AMERICA

BREEDING METHODS OF SWEET POTATO
• 1. HYBRIDIZATION
• 2 INTRA VARITAL HYBRIDIZATION
• PROPOGATION- Sweet potato is cultivated by vegetative
propagation. Growers take stem cuttings from the vines, which
then root and form new storage roots. In some colder climates,
where vines do not develop well, producers will plant roots.
Botanical seed is used in breeding programs
Presentation title 6

CASSAVA
Presentation title 7
Manihot esculenta
• FAMILY- EUPHORBEACEAE
• CHROMOSOME NO.- 36
• ORIGIN- AMAZON BASIN

PROPOGATION OF CASSAVA
• CASAVA propagated from parts of the stem known as cuttings,
especially in commercial plantations. The crop can also be
propagated by seeds under natural conditions as well as
artificial hybridization in breeding programs
Presentation title 8

COLOCASIA
Presentation title 9
COLOCASIA ESCULANTA
• FAMILY- ARACEAE
• CHROMOSOME NO.- 2n= 26, 28, 38, 42, 56
• ORIGIN- SOUTH EAST ASIA

PROPOGATION OF COLOCASIA
• To propagate colocasia by division of the tubers, there are 3
main options: Slice off the top couple of centimetres of the
tuber, where the leaf stalks emerge, and replant this to grow
into a new plant. Lift the plant and take off the small suckers of
offset tubers around the main tuber, and grow these on to
replant
Presentation title 10

ELEPHANT FOOT
YAM
Presentation title 11
Amorphophallus paeoniifolius
• FAMILY-ARACEAE
• CHROMOSOME NO.- 2n = 2x = 26, 28
• ORIGIN- AFRICA

PROPOGATION OF ELEPHANT FOOT YAM
IT IS USUALLY PROPOGATED THROUH OFFSETS OF YAM
THESE MINIATURE TUBERS THAT GROW OUT OF PARENT
CORMS ARE BUDS OF DAUGHTER CORMS.
Presentation title 12

ARTICHOKES
Presentation title 13
CYNARA CARDUNCULA
• FAMILY-ASTERACEAE
• CHROMOSOME NO.-2n= 34
• ORIGIN- MEDITERRANIAN

PROPOGATION OF ARTICHOKES
• ARTICHOKES CAN BE PROPOGATED BY 3 WAYS-
1.By Seed.
2.By Offshoots – Side shoots.
3.By Root crown division (underground shoots with apical and
lateral buds, called “ovoli”)
Presentation title 14

Thank you