Verification of QTL controlling root aerenchyma formation in a maize×teosinte "Zea nicaraguensis" advanced backcross population
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概要
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Root aerenchyma formation is considered to be one of the most important characteristics for adapting to flooding. Using an F_2 population of maize B64×teosinte Zea nicaraguensis, we earlier found that, in Z. nicaraguensis,quantitative trait loci (QTLs) in two regions of chromosome 1 (Qaer 1.02-3 and Qaer 1.07) are associated with aerenchyma formation under non-flooding conditions. The objective of this study was to determine the utility of these (and any other) aerenchyma QTLs in marker-assisted maize breeding. For this study, an elite maize Mi29×teosinte Z. nicaraguensis 214 BC_2F_1 individual population was used for advanced backcross-QTL mapping (AB-QTL). An SSR-based map was constructed using 94 markers, covering 852.7cM for the ten chromosomes. Mapping revealed that a QTL for aerenchyma formation under non-flooding conditions exhibiting a larger effect was located on chromosome 1 (bin 1.06), the position of which was close to the previously identified Qaer 1.07. Also, two QTLs with minor effects were mapped to a different position on chromosomes 1 (bin 1.11) and 5 (bin 5.09). With a few additional backcrosses, it will be possible to obtain near-isogenic lines possessing aerenchyma-forming genes. These materials may be useful in breeding flooding-tolerant maize hybrids.
著者
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Mano Yoshiro
Forage Crop Breeding Res. Team National Inst. Of Livestock And Grassland Sci.
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Omori Fumie
Forage Crop Breeding Res. Team National Inst. Of Livestock And Grassland Sci.
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Omori Fumie
Forage Crop Breeding Research Team National Institute Of Livestock And Grassland Science
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Mano Yoshiro
Forage Crop Breeding Research Team, National Institute of Livestock and Grassland Science
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Omori Fumie
Forage Crop Breeding Research Team, National Institute of Livestock and Grassland Science
関連論文
- Identification of QTL Controlling Flooding Tolerance in Reducing Soil Conditions in Maize (Zea mays L.) Seedlings(Genetic Resources Evaluation)
- QTL Mapping of Adventitious Root Formation under Flooding Conditions in Tropical Maize (Zea mays L.) Seedlings
- Verification of QTL controlling root aerenchyma formation in a maize×teosinte "Zea nicaraguensis" advanced backcross population
- High-density linkage map around the root aerenchyma locus Qaer1.06 in the backcross populations of maize Mi29×teosinte "Zea nicaraguensis"
- Accurate evaluation and verification of varietal ranking for flooding tolerance at the seedling stage in barley (Hordeum vulgare L.)
- Breeding for flooding tolerant maize using "teosinte" as a germplasm resource
- Variation for the capacity to form root aerenchyma and selection for highly aerenchyma forming lines in the rare teosinte Zea nicaraguensis