Table 3: Mean CBSD foliar severity and CBSD incidence in local cassava landraces and improved genotypes.

Class

Germplasm

CBSD-S

CBSD-I

Class

Germplasm

CBSD-S

CBSD-I

Class

Germplasm

CBSD-S

CBSD-I

LCLs

Shavirotsi

1.6 ±0.5

66.7

LCLs

Nya-Yenga

4.0 ±0.7

53.3

LCLs

Kitwa_b

2.2 ±0.4

65

"

Bwichina

2.0 ±0.0

25

"

Nya-Gang

4.4 ±0.5

33.3

"

Kitwa_c

1.6 ±0.5

13.3

"

Lunyalala

2.0 ±1.2

20

"

Nyal-Kada

3.8 ±0.8

26.7

"

Masokani_a

2.6 ±0.5

50

"

Shanina

2.4 ±0.9

50

"

Nya-Udai

4.0 ±0.7

86.7

"

Masokani_b

2.6 ±0.5

46.7

"

Mukulusu

1.0 ±0.0

0

"

Adhiambo Lera

4.2 ±0.8

40

"

Kaliluni

1.0 ±0.0

0

"

Itenyi

2.8 ±0.4

80

"

Nya-Bungoma

4.0 ±0.7

50

"

Muvila

1.0 ±0.0

0

"

Shisembe

2.4 ±0.5

80

IPGs

Lady Gay

1.2 ±0.4

16.7

"

Kalimbini_a

1.0 ±0.0

0

"

Inzakula

1.8 ±0.4

40

IPGs

Kiboko-297

1.2 ±0.4

0

"

Kalimbini_b

2.2 ±0.4

60

"

Shitaho

2.6 ±0.5

80

"

Thika-272

1.0 ±0.0

0

"

Kalimbini_c

1.4 ±0.5

50

"

Lugala

2.4 ±0.5

66.7

"

Thika-273

1.0 ±0.0

0

"

Kalimbini_d

1.2 ±0.4

10

"

Lugusisti

1.8 ±0.8

60

"

Kiboko-275

1.0 ±0.0

0

"

Kitivo

1.8 ±0.4

46.7

"

Banasa

3.2 ±0.4

66.7

"

Kiboko-274

1.0 ±0.0

0

"

Kimutwa

2.0 ±0.7

43.3

"

Isambe

1.8 ±0.4

40

"

Thika-280

1.2 ±0.4

0

"

Mumbuni

2.6 ±0.5

40

"

Isulu

2.2 ±0.8

80

"

Kiboko-300

1.0 ±0.0

0

IPGs

Katsuhanzala

3.2 ±0.4

100

"

Ikholi

2.0 ±0.7

80

"

Kiboko-271

1.0 ±0.0

0

"

Kasukari

3.8 ±0.4

95

"

Ingotse

2.6 ±0.5

80

"

Thika-279

1.2 ±0.4

0

"

TC14

4.6 ±0.5

100

"

Shikoti

2.8 ±0.4

50

"

Thika-289

1.0 ±0.0

0

"

TC4-Katune

3.8 ±0.4

100

"

Shipalo

3.2 ±0.4

62.5

"

Kiboko-295

1.0 ±0.0

0

"

99/0056

1.2 ±0.4

16.7

"

Shamiloli

2.0 ±0.0

66.7

"

Kiboko-277

1.2 ±0.4

0

LCLs

Halu

3.0 ±1.0

23.3

"

Madioli

4.4 ±0.9

100

"

Kiboko-276

1.0 ±0.0

0

"

Kibandameno

3.0 ±0.7

40

"

Shiswa

2.4 ±0.5

66.7

"

Thika-278

1.0 ±0.0

0

"

Tajirika

2.8 ±0.4

23.3

"

Magana

2.0 ±0.0

43.3

"

Kiboko-281

1.0 ±0.0

0

"

Kaleso

3.4 ±0.5

33.3

"

Matuja

2.2 ±0.4

30

"

Kiboko-9

1.2 ±0.4

0

"

Soyosoyo

2.8 ±0.4

16.7

"

Fumbachai

2.6 ±0.5

40

"

Kiboko-10

1.0 ±0.0

0

"

Sokoke_I

3.2 ±0.4

33.3

IPGs

CK9

3.0 ±0.7

63.3

"

Kiboko-11

1.0 ±0.0

0

"

Sokoke_II

2.6 ±0.5

40

"

MM96/1871

2.0 ±0.7

56.7

"

Kiboko-159

2.0 ±0.7

20

"

Kakanjuni_I

2.0 ±0.0

33.3

"

MM97/0293

2.6 ±0.5

50

"

Kiboko-257

1.0 ±0.0

0

"

Kakanjuni_II

2.0 ±0.0

23.3

"

MM98/1313-HS

1.0 ±0.0

0

"

Kiboko-258

1.6 ±0.5

20

"

Kakanjuni_III

2.8 ±0.4

33.3

"

MH95/0183

2.8 ±0.4

40

"

Kiboko-259

1.0 ±0.0

0

"

Mkongo_I

3.0 ±0.7

20

"

MM08/2206

1.0 ±0.0

0

"

Kiboko-267

2.6 ±0.5

40

"

Mkongo_II

3.0 ±0.0

36.7

"

MM96/0686

1.0 ±0.0

0

"

Kiboko-268

2.0 ±0.7

0

"

Cha-Vyango_I

3.4 ±0.5

33.3

LCLs

Aruaro

3.4 ±0.5

33.3

"

Kiboko-269

2.0 ±0.7

0

"

Cha-Vyango_II

3.2 ±0.4

20

"

Othigo-Diep

4.0 ±0.7

16.7

"

Kiboko-270

3.8 ±1.3

66.7

"

Chumani

2.4 ±0.5

36.7

"

Nyakatanegi_a

3.6 ±1.1

53.3

LCLs

Serere

4.2 ±1.1

100

"

Matano Manne

1.8 ±0.4

33.3

"

Nyakatanegi_b

4.2 ±0.8

70

"

Thika-5

4.4 ±0.5

75

IPGs

KALRO

3.4 ±0.5

56.7

"

Nya-Uyoma

4.0 ±1.0

50

LCLs

Kasioni

1.0 ±0.0

0

"

Agriculture

3.4 ±0.5

33.3

"

Kamis

3.4 ±1.5

83.3

"

Kisimba

1.0 ±0.0

0

 

 

 

 

"

Nya-Uganda

4.6 ±0.5

80

"

Kitwa_a

1.0 ±0.0

0

 

 

CBSD-S = CBSD severity; ±SD = standard deviations; CBSD-I = CBSD incidence; LCLs =Local landraces; IPGs = improved genotype; germplasm source: red = Kakamega (0°16'N; 34°45'E); green = Siaya (0°26'N; 33°58'E); blue = Kitui (0°10'S;37°50'E); pink = Makueni (1°48'S;37°37'E) and black = Kilifi (3°40'S;39°45'E)