Table 1.

Variance analyses of five investigated traits among 33 common S42ILs and parents across the years 2012 and 2013 under control and drought treatments

Trait a	SOV b	DF c	MS d	F value	P value e	h 2f
RL	Genotype	34	497.6	11.1	<0.001	0.72
	Treatment	1	147.8	3.3	ns
	Genotype × Treatment	34	110.5	2.5	<0.001
	Year	1	1628.4	36.2	<0.001
	Treatment × Year	1	348.5	7.7	<0.01
	Replication (Year)	5	84.0	1.9	ns
RDW	Genotype	34	26.5	15.2	<0.001	0.56
	Treatment	1	83.1	47.6	<0.001
	Genotype × Treatment	34	7.7	4.4	<0.001
	Year	1	120.2	68.8	<0.001
	Treatment × Year	1	17.0	9.7	<0.01
	Replication (Year)	5	1.2	0.7	ns
RV	Genotype	34	1999.5	15.8	<0.001	0.64
	Treatment	1	6556.4	51.8	<0.001
	Genotype × Treatment	34	452.4	3.6	<0.001
	Year	1	17003.4	134.4	<0.001
	Treatment × Year	1	2321.9	18.4	<0.001
	Replication (Year)	5	67.4	0.5	ns
TIL	Genotype	34	22.7	12.5	<0.001	0.76
	Treatment	1	664.1	365.3	<0.001
	Genotype × Treatment	34	4.4	2.4	<0.001
	Year	1	16.6	9.1	<0.01
	Treatment × Year	1	136.0	74.7	<0.001
	Replication (Year)	5	25.1	13.8	<0.001
GH	Genotype	34	15.3	536.4	<0.001	0.99
	Treatment	1	0.1	0.7	ns
	Genotype × Treatment	34	0.1	0.4	ns
	Year	1	0.1	0.7	ns
	Treatment × Year	1	0.1	0.2	ns
	Replication (Year)	5	0.1	1.3	ns

^aTrait: RL = Root length, RDW = Root dry weight, RV = Root volume, TIL = Tiller number per plant, GH = Growth habit.

^bSources of variation.

^cDegrees of freedom.

^dMean sum of square.

^eP-value indicates the level of significance at <0.05, <0.01 and <0.001; ns: not significant.

^fHeritability.