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Physiologic Maturity in Grain Sorghum 1
Author(s) -
Eastin Jerry D.,
Hultquist Joe H.,
Sullivan C. Y.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300020008x
Subject(s) - sorghum , biology , maturity (psychological) , zoology , agronomy , yield (engineering) , horticulture , botany , materials science , composite material , psychology , developmental psychology
External visualization of the apparent dark closing layer in the placental area near the sorghum [ Sorghum bicolor (L.) Moench] kernel attachment point coincides closely with the cutoff of radioactive assimilate translocation to the kernel. Dark layer determination permits identification of physiologic maturity or date of maximum dry weight accumulation. This judgment is meaningful because yield is a function of both time and metabolic efficiency. Genotypes can be characterized in terms of grain filling‐period duration by noting the dates of bloom and dark layer formation. Yield data plus physiologic maturity data permit direct field quantitation of the time and metabolic efficiency components of Grain dry weight accumulation.