2024-03-28T21:06:16Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/810412020-06-02T07:44:10Zcom_10261_75com_10261_6col_10261_328
DIGITAL.CSIC
author
Silvar Casao, Cristina
author
Kopahnke, Doris
author
Flath, Kerstin
author
Serfling, Albrecht
author
Perovic, Dragan
author
Casas Cendoya, Ana María
author
Igartua Arregui, Ernesto
author
Ordon, Frank
2013-07
Silvar C, Kopahnke D, Flath K, Serfling A, Perovic D, Casas AM, Igartua E, Ordon F. Resistance to powdery mildew in one Spanish barley landrace hardly resembles other previously identified wild barley resistances. European Journal of Plant Pathology 136 (3): 459-468 (2013)
0929-1873, ESSN:
http://hdl.handle.net/10261/81041
10.1007/s10658-013-0178-7
1573-8469
wo major quantitative trait loci (QTLs) associated with resistance to powdery mildew (Blumeria graminis f. sp. hordei) were previously identified on chromosome 7H of the Spanish barley line SBCC097. The two QTLs seemed to share the same chromosomal position as the major genes mlt and Mlf, which were formerly described in Hordeum vulgare ssp. spontaneum-derived lines. In the present work, different lines that carry mlt (RS42-6*O), Mlf (RS137-28*E), or a combination of both (SI-4 and SI-6) were compared with SBCC097 to evaluate their relatedness at the phenotypic, cellular, and genetic levels. The resistance of the lines was characterised by inoculating them with a set of 27 isolates of B. graminis, which displayed a wide range of virulence. It was revealed that SBCC097 possessed a distinctive resistance spectrum. Microscopic assessment of the cytological development of the resistance response showed that SBCC097 clearly formed fewer well-established colonies and secondary hyphae than the other lines. This was confirmed by the infection type recorded after visual inspection. Genetic analyses of all five lines, based on markers flanking the QTLs derived from SBCC097, supported the macroscopic and microscopic data and pointed to the presence of a combination of novel genes or alleles in SBCC097, which may be included in the category of “intermediate-acting” genes, governing resistance mainly at the post-penetration stage.
eng
openAccess
Wild barley
Landrace
Spanish Core Collection
Disease resistance
Blumeria graminis
Quantitative trait loci
mlt
Mlf
Resistance to powdery mildew in one Spanish barley landrace hardly resembles other previously identified wild barley resistances
artículo
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URL
https://digital.csic.es/bitstream/10261/81041/1/SilvarC_EuropJPlantPathol_2013.pdf
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SilvarC_EuropJPlantPathol_2013.pdf.txt