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

Table 1

A combined analysis of variance mean squares for parents and crosses at KALRO, Mtwapa, and Bahari during the long rain season of 2018.

S.O. V	d.f.	Mean squares
		1000 gwt (g)	Grl (mm)	Grw (mm)	Pht (cm)	Pwt (g)	Pnl (cm)	Ut	Yield (t·ha^−1)	50% f	Biomass (g)	Ti	fs	Ufs
Replication	2	19.185	0.028	0.059	8.52	0.065	22.78	0.108	0.2182	8.41	7257	1.1502	33.7	22.78
Genotype	8	65.685	0.801	0.846	735.54	1.499	575.54	0.461	2.1934	163.26	20158	6.303	1984.6	575.54
Site	1	3.63	0.001	0.048	158.16	1.749	62.3	0.185	2.7419	574.23	2896	10.81	4587.8	62.3
Genotype site	8	3.963	0.040	0.015	38.16	0.455	31.61	0.294	0.3257	44.88	5238	1.39	751.5	31.61
Parents	6	34.614	0.515	0.0804	230.729	0.4222	2.353	0.0721	1.55492	203.837	13862.9	4.232	1598.62	384.27
Crosses	20	36.854	0.708	0.0915	332.62	4.028	5.454	0.515	5.8932	222.433	2.684	12.689	2204.25	669.21
GCA	8	147013	406.42	2840	0.8391	404.07	4.358	295505	2710.1	0.5758	0.0928	6.3234	213.04	0.5004
SCA	20	48.54	335.4	4101	12.06	556.2	49.18	1.204	2998	39.13	0.8188	6.268	1371.1	7.379
Residual	34	9.068	0.0906	0.025	18.38	0.156	10.19	0.1385	0.1718	21.87	2924	0.7346	260.8	10.19

ANOVA tested at . Significant at and significant at . S.O.V: source of variation, 1000 gwt: 1000 grain weight, 50% f: days to 50% flowering, Grl: grain length, Grw: grain width, Pht: plant height, Pwt: panicle weight, Pnl: panicle length, Ti: total tillers, Fs: fertile spikelets, Ufs: unfertile spikelets, Ut: unproductive tillers, p: probability, g: grams, cm: centimetres, yield in t·ha⁻¹: tonnes per hectare, mm: millimetres, and M.s: mean squares.