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GrainGenes Reference Report: AUM-59-485

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Reference	AUM-59-485
Title	Identification of suppressor gene for Pm8 locus in Polish common wheat cultivars ( Triticum aestivum L.)
Journal	Annales Universitatis Mariae Curie-Skodowska.Sectio E, Agricultura
Year	2004
Volume	59
Pages	485-491
Author	Kowalczyk K
Abstract	In order to identify a suppressor locus Pm8 in the varieties without 1BL/1RS translocation, crossings of Polish common wheat cultivars with Wilga cv. containing 1BL/1RS translocation and suPm8 genes were performed. The crossing made use of the cultivars nonresistant to isolates W2 and W17. The hybrids of the selected cultivars with cv. Wilga were tested using the powdery mildew isolates W2 and W17. The F SUB 1 hybrids of cultivars Almari, Broma, Emika, Henika, Juma, Kaja, Kamila, Kobra, Oda, Olcha, Sakwa, Santa and Wanda, were resistant to the isolates used. On the other hand, the studies performed in generation F SUB 2 resulted in a segregation into the plants resistant and susceptible to definite isolates of Blumeria graminis f.sp. tritici . On verifying the results with test chi SUP 2 it was shown that the segregations did not differ in a significant way from the expected ratios in the proportion of 3 resistant:1 susceptible. On this basis it was established that these cultivars did not contain SuPm8 genes. On the other hand, F SUB 1 hybrids of the cultivars: Alba, Begra, Elena, Grana, Hera, Ilawska, Izolda, Panda, Roma and Rosa with cv. Wilga were susceptible to the powdery mildew isolates W2 and W17. In generation F SUB 2 of those hybrids were obtained segregations that were not significantly different from the expected ratios in the proportion of 13 susceptible:3 resistant. On this basis the cultivars that contained SuPm8 genes were found. The SuPm8 genes were epistatic for the Pm8 gene
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