Fig. 4

Total hydrocarbon accumulation on silks harvested at 3- and 6-days PSE. a and b Mean total hydrocarbon accumulation on emerged (a) and husk-encased (b) silks from 15 inbred lines grown in 2009. Inbred lines in panels (a and b) are ordered from low to high hydrocarbon accumulation on emerged silks at 3-days PSE (panel a). Asterisks indicate hydrocarbon accumulation at 6-days PSE is significantly greater than at 3-days PSE on emerged (a) or husk-encased (b) silks for a given inbred line (T-test; * P < 0.05, ** P < 0.001). Error bars represent ± standard error