Screening and comprehensive evaluation of maize varieties resistant to ear rot in Southwest China

doi:10.14088/j.cnki.issn0439-8114.2023.07.002

Abstract

Abstract: To screen out new maize （Zea mays L.） varieties with ear rot resistance suitable for planting in Southwest China, 42 maize varieties in Southwest China were selected for disease resistance identification and analysis of yield related traits using a randomized block design. The results showed that, different varieties had different resistance to corn ear rot, stem rot, sheath blight and other fungal diseases. Among them, Fengyu 799, Qiushuoyu No.2, Guidan 162 and Zhengda 615 had the best comprehensive resistance, reaching the high resistance （HR） level. In addition, the plant height, ear height, ear length, ear diameter, bald tip length, row number per ear, grain number per row, 100-seed weight, seed rate and yield of different varieties were significantly different; the average yield of the varieties ranged from 4 118.10 to 9 855.60 kg/hm², among which the yield of Shuijingdan 15 had the highest yield （9 855.60 kg/hm²）, followed by that of Qiushuoyu No.2 （9 758.25 kg/hm²）. On the whole, Qiushuoyu No.2, Fengyu 799, Jingyu No.1, Shuijinyu No.6, Zhenghong 311 and Zhongyu 335 had better comprehensive disease resistance and higher yields, which were suitable for new maize varieties with ear rot resistance planted in Southwest China.

Key words: maize （Zea mays L.）, ear rot, resistance, variety, screen, yield, Southwest China

CLC Number:

S513
S332.2

LI Hui, GOU Xiao-song, ZHANG Xiao-wei, SONG Cheng-xiao, DUAN Ming-yu, CHEN Xiao-cui. Screening and comprehensive evaluation of maize varieties resistant to ear rot in Southwest China[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(7): 7-11.

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