Analysis of Combining Ability for Early Maturity and Yield in Rice (Genus: Oryza) at the Kenyan Coast

Table 5

Ratios of GCA variance to SCA variance for grain yield and agronomic traits at Bahari and KALRO Mtwapa during 2018 long rain season.

Characters	σ^2 gca	σ^2 sca	2σ^2 GCA/(2σ^2 GCA + σ^2 SCA)	Gene action
Yield	0.518	1.964	0.2637	Nonadditive
Days to 50% flowering	67.946	74.144	0.9164	Nonadditive
Plant height	76.91	110.873	0.6936	Nonadditive
Number of tillers	1.411	4.23	0.8335	Nonadditive
Unproductive tillers	0.024	0.172	0.0132	Nonadditive
Panicle length	0.785	1.818	0.431	Nonadditive
Panicle weight	0.141	1.343	0.104	Nonadditive
Fertile spikelets	532.872	734.75	0.7252	Nonadditive
Unfertile spikelets	128.089	223.07	0.574	Nonadditive
Grain length	0.172	0.236	0.7288	Nonadditive
Grain width	0.027	0.031	0.87	Nonadditive
1000 grain weight	11.538	12.285	0.939	Nonadditive
Biomass	4620.952	8.949	916.258	Additive