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Sink limitation of wheat crops in the high rainfall zone of southern ...

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The problem and hypo<strong>the</strong>sis<br />

• High yield potential (6-8 t/ha), but low<br />

gra<strong>in</strong> yield (50% <strong>of</strong> <strong>the</strong> potential)<br />

achieved.<br />

Wheat belt<br />

High ra<strong>in</strong>fall <strong>zone</strong><br />

• Lack <strong>of</strong> adapted cultivars – <strong>the</strong> cultivars<br />

bred for <strong>the</strong> low and medium ra<strong>in</strong>fall<br />

<strong>zone</strong> <strong>wheat</strong>belt are grown <strong>in</strong> <strong>the</strong> HRZ.<br />

• Hypo<strong>the</strong>sis: yield potential <strong>of</strong> <strong>wheat</strong> <strong>in</strong><br />

<strong>the</strong> HRZ is limited by s<strong>in</strong>k size <strong>of</strong> <strong>the</strong><br />

current cultivars.

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