Figure 1

Fitted linear regressions (with the upper and lower bounds of 95% confidence intervals) of percentage survival on the expected inbreeding coefficients (f) for the Ridgley and Southport trials at ages 6 and 14 years from planting. The squared symbols refer to least-squares means estimated for each of four cross types (see Table 1) corresponding to f=0% (outcrosses), 12.5% (crosses among half sibs), 25% (matings among full sibs) and 50% (selfing).