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

Table 4

Specific combining ability effects for crosses at KALRO, Mtwapa, and Bahari during the long rain season of 2018.

Cross	Yield (t·ha^−1)-	50%f	Pht (cm)	Ti	Ut	Pnl (cm)	Pwt (g)	Fs	Ufs	Grl (mm)	Grw (mm)	1000 gwt (g)	Biomass (g)
D/N1	−0.37	3	−7.7	0.84	0.29	−1.87	−1.46	−25.17	35.42	−0.16	0.3	−0.87	−30.7
K/N1	−1.76	−8.4	3.1	2.34	0.84	−1.12	−1.82	−42.2	43.02	−0.6	0.21	6.53	39.34
D/N10	−1.22	−7.5	−4.7	−0.03	0.31	−2.51	2.24	−29.1	14.22	0.32	0.03	2.23	23.34
K/N10	−3.02	−17.3	−5.8	−1.14	0.89	−2.35	1.78	−54.8	11.9	1.067	0.37	8.53	29.34
N1/N10	−0.44	−6.1	0	0.86	0.71	−1.74	−0.87	−12.3	18.92	0.31	0.05	4.53	53.34
D/N2	−1.86	−2.7	−11.4	1.32	0.22	1.52	−1.37	18.27	57.02	−0.5	−0.23	2.03	41.34
K/N2	−2.45	−13.2	8.9	−0.44	1.86	0.35	−1.99	−38.6	31.9	0.53	0.14	8.73	72.34
N1/N2	0.12	−6.3	3.6	0.06	−0.06	0.72	−0.26	14.37	20.82	−0.29	−0.01	4.23	5.335
N10/N2	−0.33	−5.7	−9	0.08	0.11	−0.57	−0.95	30.73	9.22	0.33	0.03	4.83	83.34
D/N4	−0.34	−2.4	−5.6	1.33	0.18	−0.27	−0.76	30.5	14.96	−0.09	0.03	0.63	−39.7
K/N4	−1.54	−6.9	8.8	−0.67	0.54	−2.03	−1.1	16.47	47.06	0.68	0.28	9.13	45.34
N1/N4	2.46	−4.6	3.8	1.84	0.38	−2.14	−0.89	−7.1	27.3	0.04	0.11	6.03	8.34
N10/N4	−0.27	−9.4	−2	1.34	0.32	−1.94	−0.72	−13.3	19.12	0.66	0.04	7.23	43,335
N2/N4	−0.6	−2.6	0.8	1.2	0.35	0.77	−0.73	2.77	20.42	0.11	0.05	5.23	48.34
D/S	−3.17	−1.9	−28.8	1.62	0.81	1.99	−1.89	18.67	43.56	−0.418	−0.26	−1.47	−156
K/S	−1.82	−26.9	−15.8	−7.54	0.57	−0.96	−1	−12.43	23.42	0.11	−0.04	10.83	−224
N1/S	−1.93	−22.4	−22.2	−0.12	0.18	−0.74	−0.42	30.87	57.32	−0.4	0.07	5.03	−123
N10/S	−3.19	−30.4	−22.2	−0.84	0.84	−2.21	−1.39	−0.53	44.6	0.49	−0.09	2.43	−1.67
N2/S	−2.54	−16.8	−21	−1.23	0.27	−2.14	−1.17	17.17	38.2	−0.788	−0.21	1.03	−53.7
N4/S	−2.88	−5.6	−8.7	2.05	0.79	−1.88	0.78	32.57	47.62	−0.35	−0.2	−0.87	−88.7

Significance tested at , 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, g: grams, cm: centimetres, t·ha⁻¹: tonnes per hectare, and mm: millimetres.