Characterization of Brazilian spring wheat germplasm and its potential for increasing wheat genetic diversity in Canada.

Autor:	Rosa SB; Centre de recherche sur les grains (CÉROM), Saint-Mathieu-de-Beloeil, QC, Canada., Humphreys G; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada., Langille L; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada., Voldeng H; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada., Henriquez MA; Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada., Burt AJ; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada., Randhawa HS; Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada., Fetch T; Brandon Research and Development Centre, Agriculture and Agri-Food Canada, Brandon, MB, Canada., Hiebert CW; Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada., Blackwell B; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada., Zegeye T; Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada., Cummiskey A; Charlottetown Research and Development Center, Agriculture and Agri-Food Canada, Charlottetown, PEI, Canada., Fortier E; Centre de recherche sur les grains (CÉROM), Saint-Mathieu-de-Beloeil, QC, Canada., Scheeren PL; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA) Trigo, Passo Fundo, Brazil., Turra C; OR Melhoramento de Sementes, Passo Fundo, Brazil., McCallum B; Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada.
Jazyk:	angličtina
Zdroj:	Frontiers in genetics [Front Genet] 2023 Mar 17; Vol. 14, pp. 1125940. Date of Electronic Publication: 2023 Mar 17 (Print Publication: 2023).
DOI:	10.3389/fgene.2023.1125940
Abstrakt:	In the present era of climate instability, Canadian wheat production has been frequently affected by abiotic stresses and by dynamic populations of pathogens and pests that are more virulent and aggressive over time. Genetic diversity is fundamental to guarantee sustainable and improved wheat production. In the past, the genetics of Brazilian cultivars, such as Frontana, have been studied by Canadian researchers and consequently, Brazilian germplasm has been used to breed Canadian wheat cultivars. The objective of this study was to characterize a collection of Brazilian germplasm under Canadian growing conditions, including the reaction of the Brazilian germplasm to Canadian isolates/pathogens and to predict the presence of certain genes in an effort to increase genetic diversity, improve genetic gain and resilience of Canadian wheat. Over 100 Brazilian hard red spring wheat cultivars released from 1986 to 2016 were evaluated for their agronomic performance in eastern Canada. Some cultivars showed good adaptability, with several cultivars being superior or statistically equal to the highest yielding Canadian checks. Several Brazilian cultivars had excellent resistance to leaf rust, even though only a few of these tested positive for the presence of either Lr34 or Lr16 , two of the most common resistance genes in Canadian wheat. Resistance for stem rust, stripe rust and powdery mildew was variable among the Brazilian cultivars. However, many Brazilian cultivars had high levels of resistance to Canadian and African - Ug99 strains of stem rust. Many Brazilian cultivars had good Fusarium head blight (FHB) resistance, which appears to be derived from Frontana. In contrast FHB resistance in Canadian wheat is largely based on the Chinese variety, Sumai-3. The Brazilian germplasm is a valuable source of semi-dwarf ( Rht ) genes, and 75% of the Brazilian collection possessed Rht-B1b. Many cultivars in the Brazilian collection were found to be genetically distinct from Canadian wheat, making them a valuable resource to increase the disease resistance and genetic variability in Canada and elsewhere. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2023 Rosa, Humphreys, Langille, Voldeng, Henriquez, Burt, Randhawa, Fetch, Hiebert, Blackwell, Zegeye, Cummiskey, Fortier, Scheeren, Turra and McCallum.)
Databáze:	MEDLINE
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