TABLE 1.

Mean phenotypic values of parents and RILs and heritability values across environments

	Parental cvs.a			RILsb
Trait	Svevo	Kofa	Mean	Mean	h2
Grain yield (q ha−1)	39.6	39.0	39.3	35.9	0.67
Heading datec (days)	114.3	114.2	114.3	115.3	0.95
Plant height (cm)	79	76	78	76	0.91

Means of the parental cultivars (Svevo and Kofa) and means and heritability values (h²) of the 249 RILs for grain yield, heading date, and plant height are shown. The summary statistics were calculated using the data from the 16 environments.

^aStatistics calculated from the average of 20 replicated plots per experiment, as in the augmented design experimental scheme adopted in this study.

^bStatistics calculated from the best linear unbiased predictor data (field experiments with unreplicated plots).

^cDays from emergence.