（1Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China；2 Horticulture
College of Henan Agricultural University，Zhengzhou 450002，Henan，China）
Abstract：Taking 182 accessions of Solanum pimpinellifolium collected from all over the world，this study
inoculated the dominant races T0，1 and T1，2 of Phytophthora infestans in China by spraying inoculation，aiming
at screening tomato germplasm resources with resistance to late blight．The results proved that there were 25
accessions out of 182 germplasm resources having stable resistance to race T0，1 ，accounting for 13.74% of the
total materials．Among them，one accession was immune（I），5 accessions were high resistant（HR），
and 19 accessions were moderate resistant（MR）．There were 22 accessions showing resistance to race
T1，2 ，accounting for 12.09% of the total materials，of which 3 accessions were high resistant and 19 accessions
were moderate resistant．Geographic analysis of these resistant germplasms showed that they were located with
relative concentration mainly in Lima，the capital of Peru．Clustering analysis on 18 SNP molecular markers
showed that accessions with resistance to late blight could be divided into 2 big groups．Group I contained 13
accessions，with relative concentrated geographical distribution and little difference in resistance level．Group
II contained 9 accessions，with relative scattered geographical distribution and great difference in resistance
level．The obtained germplasm resources with resistance to late blight，especially these with high resistance
（PI390730，LA1604，L03707），can be used for breeding tomato resistant to late blight．
