Rahmatov, Mahbubjon
- Institutionen för växtförädling, Sveriges lantbruksuniversitet
Sammanfattning
The re-emergence of wheat stem rust disease, caused by Puccinia graminis Pers. f. sp. tritici (Eriks and E. Henn.) (Pgt), has recently been reported in Europe and North Africa. The prevalence of virulent Pgt genetic groups in Mediterranean basin countries, combined with the limited number of characterized resistance sources in durum wheat (Triticum turgidum L., ssp. durum (Desf.) Husn.) germplasm, poses a serious threat to durum wheat production. In this study, we evaluated a collection of Mediterranean wheat accessions, mainly durum wheat, for seedling stage resistance to two Ug99 races (TTKTT and TTKSK) and the recently emerged and prevalent races TTRTF (aka Sicily race) and TKKTF. Although 24% of the genotypes exhibited resistant responses, phenotyping screening showed significant variation in seedling responses to the different races. Specifically, 27% and 30% of the genotypes were resistant to TTRTF and TTKSK, whereas only 17.5% and 18% exhibited resistance to TKKTF and TTKTT, respectively. Only 9.4% of genotypes (n = 13) exhibited resistance or intermediate responses to all four tested races. Wheat accessions from Portugal, France, and Spain showed the highest resistance frequencies, ranging from 30% to 50%. Molecular analysis revealed the presence of the resistance gene Sr13 in 13 genotypes, eight of which originated from Tunisia (one landrace and seven varieties). The study demonstrates the importance of Mediterranean durum wheat accessions as sources of novel and diverse genetic resistance to the predominant races in the Mediterranean region, especially to the TTRTF, TKKTF, and Ug99 lineage races.
Publicerad i
Crop Science
2025, volym: 65, nummer: 6, artikelnummer: e70207
Utgivare: WILEY
SLU författare
UKÄ forskningsämne
Jordbruksvetenskap
Publikationens identifierare
- DOI: https://doi.org/10.1002/csc2.70207
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/145761