Table 1.

Population statistics for lodging in the Harosoy x Clark population.

Year			1998	1999	1998	1999
Water treatment			Irrigated	Irrigated	Rainfed	Rainfed
Parental	Mean	Harosoy	2.925	2.550	3.225	2.000
		Clark	2.625	2.500	2.125	2.225
	SDa	Harosoy	0.245	0.510	0.573	0.513
		Clark	0.393	0.628	0.358	0.734
	t-testb		**	ns	**	ns
	Powerc		82.6	5.90	100.0	20.3
RIL	Mean		2.74d	2.80	2.87	2.29
	Minimum		1.00	1.00	1.00	1.00
	Maximum		4.50	4.50	5.00	4.25
	Skewness		0.126	0.364	0.242	0.372
Population	Kurtosis		0.801	−0.257	−0.059	0.328
	Normalitye	S-W test	0.0061	<0.0001	0.0403	<0.0001
		K-S test	0.0220	<0.0100	0.1500	<0.0100
	H 2f			0.679		0.685
	CI of H2			0.595–0.746		0.602–0.750

^aThe SD represents the standard deviation of each parental line with 20 samples.

^bThe significance from a two-tailed t-test was presented as ** and ns, which indicates that P values were less than 0.01 and greater than 0.05, respectively.

^cThe statistical power was estimated by a two-tailed t-test.

^dPlant lodging was visually assessed by using a score that ranged from 1 (erect) to 5 (prostrate).

^eThe P values are from two types of tests used to test the normality of progeny means for each water-year data set (S-W, Shapiro-Wilk; K-S, Kolmogorov-Smirnov).

^fThe 95% of confidence intervals (CIs) of heritability were estimated from the combined two-year data from the irrigated and rainfed field trials.