我国小麦秆锈菌种群动态分析

Race dynamics analysis of Puccinia graminis f sp. tritici in China.

１９９５～１９９６年间，在我国７省区６２个县点共收集标样２８３份，涉及品种１１７个，分离到菌株４５５份，鉴定出１５个致病类型，其出现类型的发生频率分别是２１Ｃ３ＣＫＲ为１７．５％，２１Ｃ３ＣＦＨ９．６％，２１Ｃ３ＣＫＨ８．８％，２１Ｃ３ＣＦＲ６．０％，２１Ｃ３ＣＴＲ２２．０％，２１Ｃ３ＣＰＲ９．４％，２１Ｃ３ＣＴＨ８．８％，２１Ｃ３ＣＰＨ１１．９％，３４ＭＫＧ１．３％，３４Ｃ２ＭＫＨ０．２％，３４Ｃ２ＭＫＫ０．１％，３４Ｃ２ＭＦＨ３．６％，３４Ｃ２ＭＦＫ０．４％，３４Ｃ１ＭＫＲ和３４Ｃ１ＭＦＲ为０．２％。１９９６年２１Ｃ３ＣＫＲ的出现频率上升为第１位，对Ｓｒ１１有毒力的致病类型出现频率有所下降。

455 isolates were isolated from 283 crude samples collected from 117 wheat cultivars in 62 counties of 7 Provinces in 1995-1996. Fifteen pathotypes were identified in the isolates and their frequency were 21C3CKR (17.5%), 21C3CFH (96%), 21C3CKH (88%), 21C3CFR (60%), 21C3CTR (220%), 21C3CPR (94%), 21C3CTH (88%), 21C3CPH (119%),34MKG (13%), 34C1MKR (02%), 34C2MFH (36%), 34C2MFK (04%), 34C2MKH (02%) and 34C2MKK (01%), respectively. In 1996, the virulent frequency of Sr11, incuding 21C3CTR and 21C3CTH was dcreased compared with 1995. The virulenct frequency of 43 single Sr gene lines was also tested.