The effectiveness of nine strategies for selecting maize (Zea mays L.) hybrids was compared for 10 yr at nine locations. Selection effectiveness was determined by comparing the deviations of selected hybrids' yields to the mean yield of all hybrids in the next year's trial. Selection strategies were based on numbers of hybrids selected and seasons of testing. One, two, or three hybrids were selected at each location based on one‐season, two‐season, or three‐season average yields. The data set shows that yields of selected hybrids tested for two seasons were better than yields of selected hybrids tested for one season or three seasons. Selecting one hybrid was better than selecting two hybrids, and both were better than selecting three hybrids over all seasons of testing comparisons. The greatest deviation (highest yield) occurred when one hybrid was tested for two seasons. Testing season × location interactions were nonsignificant.
No takes yet. Share an insight, caveat, or question.
Cross et al. (1986) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: