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Introgression of the RppQ gene from field corn improves southern rust resistance in sweet corn.
Zhang, Nan; Qi, Xitao; Li, Xiaofeng; Li, Guangyu; Li, Gaoke; Hu, Jianguang.
Afiliación
  • Zhang N; Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou, 510640 China.
  • Qi X; Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou, 510640 China.
  • Li X; Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou, 510640 China.
  • Li G; Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou, 510640 China.
  • Li G; Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou, 510640 China.
  • Hu J; Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou, 510640 China.
Mol Breed ; 42(9): 53, 2022 Sep.
Article en En | MEDLINE | ID: mdl-37309374
Southern rust, one of the most destructive foliar diseases of sweet corn (Zea mays convar. saccharata var. rugosa), is caused by Puccinia polysora Underw. and leads to enormous yield losses and reduced quality of sweet corn in China. Utilization of resistance genes is an effective and environmentally friendly strategy for improving southern rust resistance of sweet corn. However, improvement is hampered by a lack of resistance genes in Chinese sweet corn germplasm. In this study, we introgress the southern rust resistance gene RppQ from Qi319, an inbred line of southern rust-resistant field corn, into four elite sweet corn inbred lines (1401, 1413, 1434, and 1445) using marker-assisted backcross breeding. These are parental inbred lines of four popular sweet corn varieties: Yuetian 28, Yuetian 13, Yuetian 26, and Yuetian 27. We developed five RppQ-based markers (M0607, M0801, M0903, M3301, and M3402) and employed these markers for foreground selection; 92.3 to 97.9% of the recurrent parent genomes were recovered following three or four rounds of backcrossing. The four newly developed sweet corn lines all showed significant improvement of southern rust resistance compared with their respective parent lines. Meanwhile, there was no significant difference in phenotypic data for agronomic traits. In addition, reconstituted hybrids derived from the converted lines retained resistance to southern rust, while other agronomic traits and sugar content remained unchanged. Our study provides an example of successful development of southern rust-resistant sweet corn using a resistance gene from field corn. Supplementary Information: The online version contains supplementary material available at 10.1007/s11032-022-01315-7.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Mol Breed Año: 2022 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Mol Breed Año: 2022 Tipo del documento: Article Pais de publicación: Países Bajos