Meta-analyses of QTL for grain yield and anthesis silking interval in 18 maize populations evaluated under water-stressed and well-watered environments

Table 1 Summary of the QTL for grain yield detected in 18 bi-parental populations

Population code	Water stressed		Well watered		Heritability		Genetic variance per QTL**
Population code	No. of QTL	R²(%)*	No. of QTL	R²(%)*	Water stressed	Well watered	Water stressed (%)	Well watered (%)
6x1008	2	6.10	4	21.60	0.24	0.42	12.76	12.92
6x1015	0	0.00	7	42.70	0.26	0.35	0.00	17.48
6x1016	-	-	5	37.90	0.00	0.57	0.00	13.37
6x1017	-	-	7	65.70	0.00	0.47	0.00	19.97
6x1018	1	7.70	5	34.00	0.26	0.52	29.96	13.13
6x1019	-	-	6	35.20	0.00	0.38	0.00	15.60
6x1020	2	6.10	5	24.00	0.33	0.55	9.27	8.66
6x1021	9	48.80	7	71.70	0.21	0.58	25.34	17.69
6x1023	-	-	3	28.50	0.08	0.38	0.00	25.13
6x1024	-	-	5	43.70	0.02	0.44	0.00	19.73
6x1028	-	-	7	50.00	0.00	0.40	0.00	17.86
6x1115	0	0.00	3	11.10	0.22	0.29	0.00	12.76
6x1116	3	9.30	5	62.40	0.24	0.49	12.92	25.47
6x1117	0	0.00	2	13.70	0.27	0.48	0.00	14.27
6x1118	0	0.00	2	11.70	0.40	0.26	0.00	22.50
6x1120	0	0.00	3	26.30	0.11	0.51	0.00	17.19
6x1121	1	3.90	6	60.60	0.32	0.23	12.19	43.91
6x1122	0	0.00	1	1.50	0.36	0.37	0.00	4.05
Total	18.00	81.90	83.00	642.30	3.32	7.68	102.43	321.69
Mean	1.50	6.83	4.61	35.68	0.18	0.43	5.69	17.87

*R² = the total phenotypic variance explained by all QTL.
** The genetic variance is the percent phenotypic variance explained by a single QTL divided by heritability of a trait.
Maize populations and environments are described in detail in Table 3.

ISSN: 1471-2164