黑麦草品种对灰梨孢灰斑病的室内抗性评价  

Resistance evaluation of ten ryegrass varietiesto Pyricularia grisea

作　　者：陈虹 周俗[1] 刘刚[1] 王钰 康晓慧[2] CHEN Hong;ZHOU Su;LIU Gang;WANG Yu;KANG Xiao-hui(Research Center of Alpine Grassland Ecological Restoration Engineering on Qinghai-Tibet Plateau,Sichuan Academy of Grassland Sciences,Chengdu Sichuan 611743;Southwest University of Science and Technology,Mianyang,Sichuan 621010)

机构地区：[1]四川省草原科学研究院,青藏高原高寒草地生态修复工程技术研究中心,四川成都611731 [2]西南科技大学,四川绵阳621000

出　　处：《草原与草坪》2021年第4期96-101,110,共7页Grassland and Turf

基　　金：国家重点研发计划项目(2017YFC0504803);国家现代农业产业技术体系四川饲草创新团队项目(sccxtd-2020-16)。

摘　　要：为研究不同品种黑麦草对灰梨孢灰斑病菌(Pyricularia grisea)的抵抗能力,用涂抹法将该病菌接种于四川主要栽培的10个黑麦草品种,依据病情指数评价抗病性。结果表明:一年生黑麦草(Lolium multiflorum)(6个品种)的发病率、平均严重度均显著高于多年生黑麦草(Lolium multiflorum)(4个品种)。10个黑麦草品种中,绅士、首相、纽怡、维多利亚4个多年生黑麦草品种均表现为高抗(HR),4个品种间无显著差异(P<0.05);一年生黑麦草品种均不同程度的表现为感病(HS,MS),其中川农1号、安格斯1号、安第斯、普通4个品种表现为高感(HS),杰威表现为中感(MS),长江2号表现为中抗(MR)。This study investigated the resistance of different varieties of ryegrass to Pyricularia grisea.The pathogen was inoculated with smudge method to 10 main cultivated ryegrass varieties(Lolium multiflorum,Lolium perenne)in Sichuan,and disease resistance was evaluated according to disease index.The results showed that the incidence and mean severity in annual ryegrass(six varieties)were significantly higher than those in perennial ryegrass(four varieties).The disease index was used to classify the resistance of 10 ryegrass varieties.All four perennial ryegrass of Gentleman,Prime minister,Nuyi,and Victoria showed high resistance(HR),with no significant difference between those four varieties(P<0.05).The annual ryegrass all showed different degree of susceptibility(HS,MS),among which four varieties(Chuannong 1,Angus 1,Andes and Ordinary)showed high susceptibility(HS),Jiewei showed moderate susceptibility(MS),while Changjiang 2 showed medium resistance(MR).The disease occurred and spreaded quickly,and caused severe damage.It is recommended that disease-resistant varieties would be preferentially selected for prevention and control,in addition to early prevention and control.

关 键 词：黑麦草 灰梨孢灰斑病 抗性评价 

分 类 号：S436.8[农业科学—农业昆虫与害虫防治]