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《Pratacultural Science》 2017-12
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EPG analysis of Acyrthosiphon pisumfeeding behavior on six alfalfa varieties with different resistances

Wei Shu-hua;Cao Chun-jing;Zhu Xiao-fang;Zhang Rong;Wang Ying;Institute of Plant Protection,Ningxia Academy of Agriculture and Forestry Sciences;Agriculture College,Ningxia University;  
The feeding behavior of Acyrthosiphon pisum on six alfalfa varieties with different resistances,and the resistance mechanisms of these different cultivars,were examined using the electrical penetration graph(EPG)technique.The results showed that there were eight EPG waveforms of aphids feeding on alfalfa leaves,but the durations of the eight waveforms were different between the six cultivars.The resistance of alfalfa was consistent with the duration of the E1 wave,which was produced by A.pisumfeeding on the phloem of the alfalfa varieties.The duration of the E1 wave was significantly different between the six different resistances of the alfalfa cultivars;the duration of the E1 wave was longer when the resistance of the alfalfa was stronger.The duration of the E1 wave on the most resistant cultivar was 36.83 min for‘MF4020',and the duration of E1 wave on the least resistant cultivar was 1.50 min on ‘Giant pastoral 37 CR'.The resistance mechanisms of the different alfalfa cultivars to aphids are further illustrated by electrophysiology in research;it could provide the scientific basis for the breeding of alfalfa varieties with increased resistance to aphids
【Fund】: 宁夏回族自治区农作物重大育种专项——苜蓿新品种选育(2014NYYZ03);; 国家牧草产业技术体系——盐池综合试验站(CARS-34)
【CateGory Index】: S435.4
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