Soybean Genetics Newsletter


Soybean (Glycine max (L.) Merrill) cultivars with high seed yield efficiency (SYE) can be used in breeding programs to increase yield. An efficient cultivar can be characterized either by a high ratio of seed to nonseed dry weight (above ground unthreshed air-dry weight of plant at maturity minus seed weight) or by a steep regression slope of seed over nonseed dry weight. High SYE indicates that a high proportion of total plant dry weight is seed weight (Veatch, 1930).