ArticleBMC plant biology2026
Bulked segregant RNA sequencing and linkage mapping identify a Pm4 allele conferring stable powdery mildew resistance in wheat breeding line YZ16.
Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundWheat powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), remains a major constraint on wheat production. Resistance genes with diagnostic markers and deployed without obvious agronomic disadvantages are essential for durable breeding. Here, we genetically and molecularly characterized powdery mildew resistance in the common wheat line YZ16 through inheritance analysis, bulked segregant RNA sequencing (BSR-Seq), linkage mapping and allele validation.
resultsYZ16 showed high seedling resistance to Bgt isolate E09 and resistance to nine of ten additional Bgt isolates, indicating a relatively broad resistance spectrum. Under field inoculations, YZ16 also displayed stable adult-plant resistance. Genetic analysis of an F
conclusionsPowdery mildew resistance in YZ16 is conferred by the Pm4 allele on chromosome arm 2AL and can be efficiently tracked using a functional marker. Together with resistance at both seedling and adult stages generally competitive agronomic performance under the tested conditions, YZ16 represents a valuable donor for marker-assisted selection and resistance gene pyramiding in wheat breeding.
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