Investigation for resistance traits in three hexaploid amphiploids (Tritipyrum, Triticales and wheats) to seed gall nematode and covered smut diseases
2004
Bonjar, G.H.S. (Bahonar Univ. of Kerman (Iran). Dept. of Plant Pathology) | Hassani, H.S. | Pakgohar, N. | Barkhordar, B.
Seed galls caused by Anguina tritici [Syn. Anguillulina tritici (Steinb.)] and covered smut caused by Tilletia foetida (Wallr.) are two important wheat pathogens worldwide. Presence of resistance to these pathogens were investigated in three Hexaploid Amphiploids of Triticale (AABBRR, 2n= 6x= 42), Tritipyrum (AABBEbEb, 2n= 6x= 42) and bread wheat (AABBDD, 2n= 6x= 42). Macaroni wheat (AABB, 2n= 4x= 28) and a double haploid wheat (AABBDD, 2n= 6x= 42) were included as controls. To gall nematode, line 4115 of Triticales, Tritipyrum lines of (Maconum/Thinopyrum bessarabicum x Creso/Thinopyrum bessarabicum, F4), (Karim/Th. bessarabicum x Creso/Th. bessarabicum, F3, F5), double haploid variety (Omid, F3), Macaroni wheat (Yavaros) and bread wheat varieties (Falat, Atila and Omid) were resistant and, Triticales (lines of 4115 and M45), Tritipyrum (Stewart/Th. bessarabicum x Creso/Th. bessarabicum, F4) and bread wheat (Roshan) were susceptible. To covered smut, line 4116 of Triticale, three lines of Tritipyrum (Stewart/ Th. bessarabicum x Creso/Th. bessarabicum, F4), (Karim/Th. bessarabicum x Creso/Th. bessarabicum, F3), (Macoum/Th. bessarabicum x Creso/Th. bessarabicum, F4) and double haploid (Omid, F3) were resistant and bread wheat cultivars (Falat, Atila and Roshan), Macaroni wheat (Yavaros), Triticales (lines of 4115 and M45) and one Tritipyrum (Karim/Th. bessarabicum x Creso/Th. bessarabicum, F4), were susceptible. It is conclusive that there is more genetic diversity in new lines of Triticales and Tritipyrum in comparison with that of Macaroni and bread wheat lines. Resistant lines found for these two diseases in this study, could be proper sources for producing genetically resistant and transgenic lines of present commercial wheat varieties. This the first report of resistance of the mentioned lines to A. tritici and T. caries in the first ever trial in Iran.
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