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Evaluation on Maize Germplasm Resources for Resistance to Gray leaf spot

Xu Xiude

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Abstract

During 2001-2004,a total of 413 inbred lines and 59 hybrids of maize have been evaluated for resistance to gray leaf spot caused by Cercospora zeae-maydis Tehon Daiels,using a syringe inoculation in the field condition.Six highly resistant and twenty-eight resistant inbred lines and seven resistant hybrids were screened for the disease.The result showed that there was significantly resistance difference among inbred and hybrids,only a few of the highly resistant inbred resources were fund,but none of the hybrids was highly resistant.It is necessary to collect and evaluate the resistant germplasm in breeding program.

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What this paper is about

During 2001-2004,a total of 413 inbred lines and 59 hybrids of maize have been evaluated for resistance to gray leaf spot caused by Cercospora zeae-maydis Tehon Daiels,using a syringe inoculation in the field condition.Six highly resistant and twenty-eight resistant inbred lines and seven resistant hybrids were screened for the disease.The result showed that there was significantly resistance difference among inbred and hybrids,only a few of the highly resistant inbred resources were fund,but none of the hybrids was highly resistant.It is necessary to collect and evaluate the resistant germplasm in breeding program.

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Available abstract

During 2001-2004,a total of 413 inbred lines and 59 hybrids of maize have been evaluated for resistance to gray leaf spot caused by Cercospora zeae-maydis Tehon Daiels,using a syringe inoculation in the field condition.Six highly resistant and twenty-eight resistant inbred lines and seven resistant hybrids were screened for the disease.The result showed that there was significantly resistance difference among inbred and hybrids,only a few of the highly resistant inbred resources were fund,but none of the hybrids was highly resistant.It is necessary to collect and evaluate the resistant germplasm in breeding program.

Key concepts: Germplasm, Biology, Cercospora, Hybrid, Inbred strain, Leaf spot, Inoculation, Agronomy

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