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Postulation of genes for stem rust resistance in 36 chinese wheat cultivars



Postulation of genes for stem rust resistance in 36 chinese wheat cultivars



Scientia Agricultura Sinica 21(5): 45-52



The presence of genes for resistance to stem rust (Puccinia graminis Pers. f. sp. tritici) was studied in 36 Chinese wheat cultivars by determining their reactions to 23 stem rust isolates. These were the most widely grown cultivars in the 1960 to 1980's. Only 7 genes Sr 5, 6, 8a, 11, 17, 36 and Tmp of the 25 Sr genes resistance for stem rust evaluated were postulated as being present in these cultivars. Yangmai 1 possessed genes for resistance other than those studied. No Sr genes for resistance were detected in Beijing 6, Beijing 8, Beijing 15, Shijiazhuang 34, Fengchen 3 and Aifeng 4. Sr 5 was postulated in Dongfanghong 2, Dongfanghong 6, Kefeng 1, Beijing 10, Anhui 11, Jinghong 1, Jinghong 2 and Qingchung 5. Sr Tmp was in Nungda 311, Nungda 139, Beijing 9, Beijing 11, Baiyubao, Yanan 15, Xuzhou 14 and Beijing 10. Sr 8 in Aiganzao and Anhui 11; Sr 17 in Aiganzao, Jinghong 1 and Jinghong 2 while Sr 6 and Sr 11 probably in Qingchung 5. Dongxie 3 and Dongxie 4 possessed Sr 5 and Sr 31. Fengkang 2, Fengkang 8, Jingdan 106, Ji 78-4078, Lumai 1 and Yan 7770-4 probably had Sr 31. Fengkang 13 had Sr 5 plus another unidentified gene. Fu 63, Jingmai 11 and Bainong 3217 probably had an undesignated resistance gene(s) effective against only a few races.

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