Table 1 Characteristics of D. dumetorum accessions used in this study. * Area belongs to agro-ecological zone 3, ** to agro-ecological zone 4

A07W

Baigon 1

West*

Few

Yellow

Yes

A08W

Fonkouankem 1

West*

Many

Yellow

Yes

A09I

Ibo sweet 3

Nigeria

Few

Yellow

No

A10W

Bangangté 1

West*

Few

Yellow

Yes

A11S

Muyuka 1

Southwest**

Few

White

Yes

A12S

Muyuka 5

Southwest**

Few

White

Yes

B07N

Bambui 1

Northwest*

Few

Yellow

Yes

B08W

Bangou 1

West*

Many

Yellow

Yes

B09W

Bamendjou 2

West*

Many

Yellow

Yes

B10W

Bana 1

West*

Few

Yellow

Yes

B11S

Bekora 1

Southwest**

Few

White

Yes

B12S

Country yam 2

Southwest**

Few

White

Yes

C07S

Banga bakundu sweet 1

Southwest**

Few

White

Yes

C08I

Ibo sweet 2

Nigeria

Many

White

Yes

C09W

Bamendjou 1

West*

Few

Yellow

Yes

C10N

Nkwen 1

Northwest*

Few

Yellow

Yes

C11S

Bekora 2

Southwest**

Few

White

Yes

C12S

Muyuka 3a

Southwest**

Few

White

Yes

D07S

Country yam 1

Southwest**

Few

White

Yes

D08W

Bamokonbou 1

West*

Many

Yellow

Yes

D09S

Muyuka 3

Southwest**

Few

White

Yes

D10N

Bambalang 1

Northwest*

Few

Yellow

Yes

D11S

Mabondji sweet yellow 1

Southwest**

Few

Yellow

Yes

D12S

Penda-boko sweet 1

Southwest**

Few

White

Yes

E07S

Lysoka sweet 1

Southwest**

Many

Yellow

Yes

E08I

Ibo sweet 1

Nigeria

Few

White

Yes

E09W

Dschang 1

West*

Few

Yellow

Yes

E10S

Mbongue sweet 1

Southwest**

Few

White

Yes

E12W

Fong-tongo 1

West*

Many

Yellow

Yes

F07 N

Mankon 1

Northwest*

Few

Yellow

Yes

F08 W

Bayangam 1

West*

Few

Yellow

Yes

F09S

Mabondji sweet white 1

Southwest**

Few

White

Yes

F10 N

Batibo 1

Northwest*

Few

Yellow

Yes

F11S

Buea sweet white yam 1

Southwest**

Few

White

Yes

G07 N

Guzang 1

Northwest*

Many

Yellow

Yes

G08 W

Bayangam 2

West*

Many

Yellow

Yes

G09 W

Bangang 1

West*

Few

Yellow

Yes

G10 N

Fundong 1

Northwest*

Few

Yellow

Yes

H06N

Babungo 1

Northwest*

Few

Yellow

Yes

H07S

Buea sweet 1

Southwest**

Many

Yellow

Yes

H08W

Bangang 2

West*

Many

Yellow

Yes

H09W

Babadjou 1

West*

Few

Yellow

Yes

H10N

Bafut 1

Northwest*

Few

Yellow

Yes

H11S

Alou 1

Southwest**

Few

Yellow

Yes