Yazdani, Mahboobeh
- Department of Plant Breeding, Swedish University of Agricultural Sciences
Abstract
Stem rust and stripe rust are among the most devastating wheat (Triticum aestivum L.) diseases globally. This study used marker-assisted selection to incorporate two resistance genes, Sr59 and YrSLU (where SLU is Swedish University of Agriculture Science), derived from rye (Secale cereale L.), into elite wheat backgrounds. The initial cross combined Sr59 from line TA5095 and YrSLU from line #392 using kompetitive allele-specific PCR (KASP) markers. A three-step crossing scheme integrated these genes into adapted wheat lines. F1 plants were crossed with the commercial wheat variety Linkert, followed by top-crossing with Navruz. Selected progeny were double top-crossed with an elite breeding line, SLU-Elite, producing generations TT1 to TT4 through self-pollination. Plants containing Sr59 and YrSLU were identified at each generation using KASP markers. Field trials in the TT5 generation assessed agronomic performance and increased seed production. In the TT6 and TT7 generations, seedling resistance tests confirmed that Sr59 conferred robust resistance to Pgt races TTKSK, TTRTF, and TTTTF. YrSLU provided resistance against Pst races Psts10, Psts16, Psts7, and Psts13. However, TT6 remained segregated for resistance to Pst race Psts7 (Warrior). By TT7, consistent resistance to Psts7 was observed in pyramided lines. This study shows the effectiveness of crossing schemes integrating rye-derived resistance genes into wheat. KASP markers enabled precise selection, combining enhanced disease resistance with elite agronomic traits. These findings demonstrate a practical approach to improving wheat's resilience to rust diseases through targeted breeding.
Published in
Crop Science
2025, volume: 65, number: 3, article number: e70080
Publisher: WILEY
SLU Authors
Ashraf, Rimsha
- Department of Plant Breeding, Swedish University of Agricultural Sciences
- Department of Plant Breeding, Swedish University of Agricultural Sciences
Johansson, Eva
- Department of Plant Breeding, Swedish University of Agricultural Sciences
- Department of Plant Breeding, Swedish University of Agricultural Sciences
Rahmatov, Mahbubjon
- Department of Plant Breeding, Swedish University of Agricultural Sciences
- Department of Plant Breeding, Swedish University of Agricultural Sciences
UKÄ Subject classification
Genetics and Breeding in Agricultural Sciences
Agricultural Science
Publication identifier
- DOI: https://doi.org/10.1002/csc2.70080
Permanent link to this page (URI)
https://res.slu.se/id/publ/143018