A major issue in rice production is the control of Pyricularia oryzae, the causal agent of rice blast. Genotypes with R resistant leucine-rich repeat genes control specific races of the parasite. However, the resistance is overcome by the pathogen, over a sufficiently long time. In temperate areas, current cultivated varieties have a largely insufficient field resistance. This prompted us to undertake the pyramiding of the R resistance genes Pib, Piz, Pik, Pita2, and Piz-t in temperate japonica materials. Two lines were produced, SJKK and SJKT-2, that have each four pyramided genes. They are fully resistant to rice blast when tested in the field and in greenhouse. However, the tropical origin of the R donor genotypes added complexity to the pyramiding exercise. The results point to a lack of fitness costs in pyramided lines.
Blast resistance R genes pyramiding in temperate japonica rice / C.M. Pozzi, G. Orasen, E. Puja, M.R. Stile, R. Greco. - In: EUPHYTICA. - ISSN 0014-2336. - 216:3(2020 Mar 01).
Titolo: | Blast resistance R genes pyramiding in temperate japonica rice |
Autori: | ORASEN, GABRIELE (Secondo) GRECO, RAFFAELLA (Ultimo) |
Parole Chiave: | rice blast; LRR genes; R gene pyramiding; temperate germplasm; Greenhouse and field trials; |
Settore Scientifico Disciplinare: | Settore AGR/07 - Genetica Agraria |
Data di pubblicazione: | 1-mar-2020 |
Rivista: | |
Tipologia: | Article (author) |
Data ahead of print / Data di stampa: | feb-2020 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/s10681-020-2575-2 |
Appare nelle tipologie: | 01 - Articolo su periodico |
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