337份外引种质对玉米丝黑穗病的抗性及评价

采用田间人工接种法对337份外引玉米种质进行抗丝黑穗病的鉴定和评价.结果表明:在337份玉米种质中,有14份材料表现高抗(HR),33份材料表现抗病(R),39份材料表现中抗(MR),各占供鉴材料的4.2％,9.8％和11.6％.其余251份表现感病(S)和高感(HS),共占鉴定材料数的74.5％.由此可见,供试玉米种...

Resistance of 337 Introduced Germplasms to Head Smut in Maize and Its Evaluation

The resistance of 337 introduced maize germplasms to head smut in maize were identified and evaluated by the field artificial inoculation in Yuzhong County of Lanzhou in Gansu province. The results showed that among the 337 maize germplasms, 14 materials showed high resistance, 33 materials showed resistance, and 39 materials showed moderate resistance, accounting for 4.2 %, 9.8 % and 11.6 % of the identified materials, respectively. The rest of 251 materials showed susceptible and highly susceptible, accounting for 74.5 % of the identified materials. It can be seen that there were significant differences in the resistance performance of the maize germplasms to Sporosporium reilianum, and the overall resistance was lower. There were 72 inbred lines with moderate resistance or above, accounting for 27.6 % of the tested 261 American inbred lines. 14 hybrids showed moderate resistance or above, accounting for 18.4 % of the tested 76 Russian hybrids. The results indicated that the resistance resources of American inbred lines were more abundant than that of Russian hybrids.