ArticleTAG. Theoretical and applied genetics. Theoretische und angewandte Genetik2024
Mapping and characterization of rust resistance genes Lr53 and Yr35 introgressed from Aegilops species.
Article in TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Precise mapping of high-temperature adult-plant stripe rust resistance gene Yr52 in wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2026Article
- Gametocidal genes: biological mechanisms owing to hybrid dysgenesis in crop breeding, challenges and innovation.Annals of botany · 2026Review
- Molecular characterization of a new wheat-Thinopyrum ponticum translocation line with resistance to stripe rust.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- A Unique Expression Profile Responding to Powdery Mildew in Wild Emmer Wheat D430.International journal of molecular sciences · 2024Article
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15 authors.
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Abstract
key messageThe rust resistance genes Lr53 and Yr35 were introgressed into bread wheat from Aegilops longissima or Aegilops sharonensis or their S-genome containing species and mapped to the telomeric region of chromosome arm 6BS. Wheat leaf and stripe rusts are damaging fungal diseases of wheat worldwide. Breeding for resistance is a sustainable approach to control these two foliar diseases. In this study, we used SNP analysis, sequence comparisons, and cytogenetic assays to determine that the chromosomal segment carrying Lr53 and Yr35 was originated from Ae.longissima or Ae. sharonensis or their derived species. In seedling tests, Lr53 conferred strong resistance against all five Chinese Pt races tested, and Yr35 showed effectiveness against Pst race CYR34 but susceptibility to race CYR32. Using a large population (3892 recombinant gametes) derived from plants homozygous for the ph1b mutation obtained from the cross 98M71 × CSph1b, both Lr53 and Yr35 were successfully mapped to a 6.03-Mb telomeric region of chromosome arm 6BS in the Chinese Spring reference genome v1.1. Co-segregation between Lr53 and Yr35 was observed within this large mapping population. Within the candidate region, several nucleotide-binding leucine-rich repeat genes and protein kinases were identified as candidate genes. Marker pku6B3127 was completely linked to both genes and accurately predicted the absence or presence of alien segment harboring Lr53 and Yr35 in 87 tetraploid and 149 hexaploid wheat genotypes tested. We developed a line with a smaller alien segment (< 6.03 Mb) to reduce any potential linkage drag and demonstrated that it conferred resistance levels similar to those of the original donor parent 98M71. The newly developed introgression line and closely linked PCR markers will accelerate the deployment of Lr53 and Yr35 in wheat breeding programs.
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