Analysis of Physiological Race and Mating Type Composition of Setosphaeria turcica in China
The physiological races of 127 isolates of Setosphaeria turcica collected from 57 cities and counties of 10 provinces(autonomous regions)in 2021 were identified on differential hosts containing Ht single resistance gene,and the mating type of the tested isolates was detected by specific primers.The identification results of physio-logical races showed that there were 14 physiological races including 0,1,2,12,3,13,23,N,1N,2N,3N,13N,23N,123N.Among these races,race 0 and race 1 accounted for 34.65％and 28.35％of the tested isolates respec-tively,and were the main race group.There was a diversity of physiological races of S.turcica in China,with more obvious physiological differentiation in Northeast China.The toxicity frequency of the tested isolates to Htl,Ht2,Ht3 and HtN was 41.73％,9.45％,25.20％and 17.32％,respectively.The results of mating type detection showed that there were two mating types,A and a,in the isolates,and the proportion of mating type a was significantly high-er than that of mating type A,and the composition of mating types varied in different provinces.
MaizeSetosphaeria turcicaPhysiological raceToxicity analysisMating type
NETL
NSTL
万方数据
