栽培大豆种质资源对大豆菌核病的抗性评价

采用离体叶柄接种法鉴定了200份栽培大豆高世代品系对大豆菌核病菌株Jia30和Jian29的抗感反应.结果表明:在所有的参鉴材料中没有发现免疫类型,但各品系间抗性有一定的差异.供试200个品系中既表现抗Jia30菌株义表现抗Jian29菌株的材料占供试材料的2%;抗Jia30菌株的材料占3%;抗Jian29菌株的材料占5%,根据抗性资源筛选结果,这些抗性材料可合理地用于大豆生产,并为大豆抗病育种亲本选择和利用品种布局进行大豆菌核病生态控制提供了依据.

Identification of Resistance to Sclerotinia Sclerotiorum in Soybean Germplasm

Sclerotinia stem rot of soybean,commonly called white mould,is a fungal disease caused by Sclerotinia sclerotio-rum( Lib. )de Bery in the world. The disease distributed all throughout China, especially in Heilongjiang and Inner Mongolia. Heilongjiang is the main soybean production region in China,and white mould occurred seriously in recent years for the increase planting area of soybean,rape and sunflower. Utilization of resistant cultivars is the most economic,efficient, and safe method to control this disease. Screening on the resistance germplasm is the basis for resistance breeding. In this study, the reaction of 200 soybean lines to Sclerotinia sclerotiorum isolates Jia30 and Jian29 were evaluated by leafstalk inoculation in-vitro under controlled conditions. The results showed that there was no immunity accession among all the soybean lines tested,but there was difference in resistance among them. Four lines were resistant to the both isolates,representing 2% of all the accessions tested;Six lines were resistant to isolates Jia30, representing 3% of all the accessions tested;Ten lines were resistant to isolates Jian29,representing 5% of all the accessions tested. These lines could be used in soybean resistance breeding,and provide references for parent choosing in soybean resistant breeding and ecological control by arrangement of cultivars with different resistance.