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| Resistance Identification and Evaluation of 47 Fresh Corn Hybrids to Sporisorium reilianum and Ustilago maydis |
| ZHOU Tian-wang1，2，WANG Chun-ming1，2，ZHANG Xiao-jie3，GUO Cheng1，2* |
| 1Institute of Plant Protection，Gansu Academy of Agricultural Sciences，Lanzhou 730070， Gansu，China；2Scientific Observation and Experimental Station of Crop Pests in Tianshui，Ministry of Agriculture and Rural Affairs，Tianshui 741200，Gansu，China；3College of Plant Protection，Gansu Agricultural University， Lanzhou 730070，Gansu，China |
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Abstract The resistance of 47 fresh corn hybrids to head smut caused by Sporisorium reilianum and gall smut caused by Ustilago maydis were carried out in fields by artificial inoculation in 2018．The identification results for resistance to head smut showed that there were no highly resistant materials in these fresh corn hybrids．Four of them showed resistance，including‘ Sanhetianjianuo No.6’，‘ Jinhui588’，‘Jinhui895’ and ‘Heitiannuo520’，accounting for 8.5%．One material （‘Shengcaitian No.3’） showed moderate resistance，accounting for 2.1%．There were14 materials showed susceptibility，accounting for 29.8%．The rest 28 materials showed high susceptibility，accounting for 59.6%．The identification results for resistance to gall smut indicated that 27 materials out of 47 fresh corn hybrids showed high resistance，accounting for 57.4%．There were 6 materials showed resistance，accounting for 12.8%．Another 6 materials showed moderate resistance， accounting for 12.8%．There were 5 materials showed susceptibility，accounting for 10.6%．The rest 3 materials showed high susceptibility，accounting for 6.4%．New fresh corn varieties with resistance to head smut were deficient．While， varieties resistant to gall smut were abundant．Varieties with resistance to both diseases were in great shortage．
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Received: 01 May 2019
Published: 08 October 2019
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