Wheat varieties that Borlaug worked with had tall, thin stalks.

博洛格研究的小麦品种有又高又细的茎。

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So far, researchers havedeveloped about 60 experimental wheat varieties with multiple low-resistancegenes.

到目前为止，研究者已经开发了大约60种含有多种低抗性基因的实验型小麦品种。

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And he worked in the laboratory to breed new wheat varieties that could resist disease.

VOA: special.2009.09.22

But his big breakthrough came later, breeding high-yielding wheat varieties that more than tripled the harvest.

VOA: standard.2009.09.16

"This is a new strain of stem rust organism that has the power to destroy most of the wheat varieties being grown around the world."

VOA: standard.2009.09.16

In early trials, the resulting crop seemed bigger and stronger than the current modern wheat varieties.

BBC: Cambridge-based scientists develop 'superwheat'

So far, researchers have developed about 60 experimental wheat varieties with multiple low-resistance genes.

ECONOMIST: Wheat rust and world farming

Only a handful of wheat varieties have any resistance to Ug99, implying that harvests could fail even more completely than during earlier epidemics.

ECONOMIST: Wheat rust and world farming