Comment on "Selection system efficiencies for computer-simulated progeny test field designs in loblolly pine" J. A. Loo-Dinkins, C. G. Tauer and C. C. Lambeth.

Loo-Dinkins et al. reported relatively poor 'realized' gains from selecting individuals on departures from the means of small multi-tree plots. This could be largely attributed to disregarding a heritability of plot effects.