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).
Joshi, J. M. and Smith, P. E.
"Research Notes: Seed Yield Efficiency in Soybeans,"
Soybean Genetics Newsletter: Vol. 3
, Article 24.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol3/iss1/24