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Does Maintaining Green Leaf Area in Sorghum Improve Yield under Drought? II. Dry Matter Production and Yield

^a Hermitage Research Station, Department of Primary Industries, Warwick Queensland 4370, Australia
^b QDPI/CSIRO Agricultural Production Systems Research Unit, Toowoomba Queensland 4350, Australia

View larger version (20K): [in a new window]   Fig. 1 Temporal pattern of aboveground dry matter production for nine sorghum hybrids grown under three water regimes: (a) no water deficit, (b) postflowering water deficit, and (c) terminal water deficit. Anthesis at Day 56 is marked with an arrow. Vertical bars denote

View larger version (31K): [in a new window]   Fig. 2 The effects of the A35 source of stay-green on biomass partitioning among various plant components in crosses with RQL36: (a) green leaf, (b) dead leaf, (c) stem, and (d) panicle. Vertical bars denote

View larger version (31K): [in a new window]   Fig. 3 The effects of the RQL12 source of stay-green on biomass partitioning among various plant components in crosses with AQL41: (a) green leaf, (b) dead leaf, (c) stem, and (d) panicle. Vertical bars denote

View larger version (22K): [in a new window]   Fig. 4 The relationship between onset of leaf senescence and grain yield for sorghum hybrids grown under postflowering water deficit and terminal water deficit

View larger version (22K): [in a new window]   Fig. 5 The relationship between relative rate of leaf senescence and stem reserves mobilized for nine sorghum hybrids grown under terminal water deficit

View larger version (19K): [in a new window]   Fig. 6 The relationships between (a) relative rate of leaf senescence and grain growth rate and (b) grain growth rate and grain yield for nine sorghum hybrids grown under terminal water deficit