What question did this study set out to answer?

To determine whether high rates of nitrogen fertilization impair the expression of slow-mildewing resistance to powdery mildew in Knox wheat compared to a susceptible cultivar.

February 25, 2009Phytopathology

The Effect of Nitrogen Fertilization on the Expression of Slow-Mildewing Resistance in Knox Wheat

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GSGregory ShanerAgricultural Research Service

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Implication

Field trial demonstrates durable slow-mildewing resistance across high nitrogen levels in Knox wheat, highlighting optimal conditions for disease resistance breeding.

Key Points

To determine whether high rates of nitrogen fertilization impair the expression of slow-mildewing resistance to powdery mildew in Knox wheat compared to a susceptible cultivar.
Evaluated powdery mildew development on slow-mildewing cultivar Knox and susceptible cultivar Vermillion across a 4-year field trial in Lafayette, Indiana.
Treated cultivars with three distinct levels of nitrogen fertilizer to assess disease behavior under varying fertility and weather conditions.
Assessed disease dynamics by calculating the area under the disease progress curve and logit transformation statistics to compare measurement variance.
Knox wheat maintained effective slow-mildewing resistance across the highest nitrogen fertilizer rates, exhibiting minimal disease escalation while severity increased markedly on Vermillion.
Differences in disease severity between cultivars were negligible under low nitrogen fertility or unfavorable weather conditions.
The area under the disease progress curve exhibited lower error variance than logit-transformed severity data, establishing it as a superior metric for quantifying slow-mildewing resistance.

Cite This Study

Gregory Shaner (2009) studied this question.

synapsesocial.com/papers/6a83f7cf4d653d38678debc9 https://doi.org/10.1094/phyto-67-1051

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Implication

Field trial demonstrates durable slow-mildewing resistance across high nitrogen levels in Knox wheat, highlighting optimal conditions for disease resistance breeding.

The Effect of Nitrogen Fertilization on the Expression of Slow-Mildewing Resistance in Knox Wheat

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Implication

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Cite This Study

The Effect of Nitrogen Fertilization on the Expression of Slow-Mildewing Resistance in Knox Wheat

Discussion

Member takes

Implication

Key Points

Cite This Study

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