Table 3.

Relative importance of GCA and SCA mean squares (expressed as the GCA/SCA ratio) evaluated in different genetic designs for different relevant traits in cassava

First author	FRY	DMC	HI	PT	CMD**	CBSD**	CMB**	CGM**
Bueno (1991)*	0.49
Cach	5.0	8.4	3.5	5.9
Calle	3.5	17.3	6.1	19.7
Chipeta	1.0						0.7	1.9
Easwari	2.1	0.2	1.1
Jaramillo	2.3	5.8	7.0	1.6
Kamau	1.1	1.3	0.8		1.1			1.1
Kulembeka	1.1		3.3			21.5
Lokko					9.0
Njenga	0.8
Parkes	0.5	1.6	1.0		1.7
Were	0.4				12.0
Zacarias	0.2		3.5			0.8	2.7
Mean	1.6	5.8	3.3	9.1	5.9	11.2	1.7	1.5

FRY fresh root yield, DMC dry matter content, HI harvest index, PT plant type, CMD cassava mosaic disease, CBSD cassava brown streak disease, CMB cassava mealybug, CGM cassava green mite

* For this author, the ratio presented is ${\mathit{\sigma }}_{\text{A}}^2$ / ${\mathit{\sigma }}_{\text{D}}^2$

** Based on reactions on 1–5 scale, where 1 = least damage and 5 = most damage