Beschreibung:
<jats:p>Twenty-two sweet potato [<jats:italic>Ipomoea batatas</jats:italic>(L.) Lam.] clones with a wide range in metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4<jats:italic>H</jats:italic>)-one] tolerance were used to establish narrow sense heritability estimates (h<jats:sup>2</jats:sup>) using a greenhouse procedure. The heritability estimates were obtained from simple linear regressions (h<jats:sup>2</jats:sup>= 2b) of injury rating, shoot fresh weight, and change in shoot fresh weight of offspring against the same responses of parents at metribuzin concentrations of 0, 0.3, and 0.6 ppm in the potting medium and averaged data for the two concentrations. These values ranged from 0.85 to 1.0, indicating that a recurrent mass selection process should be an appropriate approach to developing metribuzin-tolerant cultivars. Several highly tolerant clones were identified.</jats:p>