Mapa de genes de resistência à ferrugem da folha em trigo ‘Guinong08-6’

Autores

  • Luhua Li Guizhou University https://orcid.org/0000-0002-6212-2105
  • Jianshu Sui Guizhou Drought Grain Sorghum Research Institute
  • Mingjian Ren Guizhou University
  • Ruhong Xu Guizhou University

DOI:

https://doi.org/10.5433/1679-0359.2023v44n2p601

Palavras-chave:

Puccinia triticina, SSR, Genes dominantes complementares, Gene de resistência.

Resumo

A ferrugem da folha do trigo (Puccinia triticina Eriks.), importante doença do trigo em todo o mundo, causa graves perdas de rendimento e, portanto, o desenvolvimento de cultivares resistentes é muito importante. Nesta pesquisa, uma linhagem chinesa de trigo (Guinong08-6) mostrou resistência de plantas adultas a uma mistura de isolados do patógeno, , na região de Guiyang, China. Essa linhagem foi cruzada com uma linhagem suscetível de trigo (Guinong19) para desenvolver híbridos F1, F2 e F3. Combinados de marcadores SSR e STS foram usados para mapear genes de resistência à ferrugem da folha em Guinong08-6, e o fenótipo de resistência de Guinong08-6 foi co-regulado por dois genes dominantes complementares, chamados LrGn08-6A e LrGn08-6B. LrGn08-6A foi mapeado para o cromossomo 2AS com marcadores URIC-LN2 e Xgpw2204, que flanquearam o gene em distâncias de 1,8 centimorgano (cM) e 14,83 cM, respectivamente. LrGn08-6B foi mapeado para o cromossomo 4DL com marcadores Xgpw342 e Xbarc93, e ambos flanquearam o gene a uma distância de 26,57 cM. As análises genéticas e moleculares de marcadores demonstraram que LrGn08-6A, que foi herdado de Aegilops ventricosa, pode ser o gene de resistência Lr37, enquanto LrGn08-6B pode ser um gene recentemente descoberto de resistência à ferrugem da folha do trigo.

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Biografia do Autor

Luhua Li, Guizhou University

Profs. Drs., College of Agriculture, Guizhou University, Guiyang, Guizhou, China.

Jianshu Sui, Guizhou Drought Grain Sorghum Research Institute

Associate Researcher, Guizhou Drought Grain Sorghum Research Institute, Guiyang, Guizhou, China.

Mingjian Ren, Guizhou University

Prof. Dr., Guizhou Sub-center of National Wheat Improvement Center, Guiyang, Guizhou, China.

Ruhong Xu, Guizhou University

Prof.  Dr., College of Agriculture, Guizhou University, Guiyang, Guizhou, China.

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Publicado

2023-05-03

Como Citar

Li, L., Sui, J., Ren, M., & Xu, R. (2023). Mapa de genes de resistência à ferrugem da folha em trigo ‘Guinong08-6’. Semina: Ciências Agrárias, 44(2), 601–612. https://doi.org/10.5433/1679-0359.2023v44n2p601

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