The theory of correlated response to selection developed by
Falconer (1989) permits breeding strategies to be evaluated on
the basis of the predicted response in the target environment
resulting from selection conducted in a selection environment.
In our study, the predicted ratio of correlated response to
selection for grain yield under non-stress situations to direct
response to selection under stress (CRY/DRY) was always less
than 1.0, ranging from 0.18 to 0.68 (Table 3). The lower CRY/
DRY value indicates that indirect selection for grain yield under
non-stress conditions for yield improvement under stress will
be less effective than direction selection for grain yield under
drought in these populations and environments.
The heritability (H) of secondary traits, (HI, PE%, DTF, LR
and LD), genetic correlation between secondary traits and grain