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Article
2022
Effective pollen-fertility restoration is the basis of hybrid rye production and ergot mitigation
Effective pollen-fertility restoration is the basis of hybrid rye production and ergot mitigation
Abstract (English)
Hybrid rye breeding leads to considerably higher grain yield and a higher revenue to the farmer. The basis of hybrid seed production is the CMS-inducing Pampa (P) cytoplasm derived from an Argentinean landrace and restorer-to-fertility (Rf) genes. European sources show an oligogenic inheritance, with major and minor Rf genes, and mostly result in low-to-moderate pollen-fertility levels. This results in higher susceptibility to ergot (Claviceps purpurea) because rye pollen and ergot spores are in strong competition for the unfertilized stigma. Rf genes from non-adapted Iranian primitive rye and old Argentinean cultivars proved to be most effective. The major Rf gene in these sources was localized on chromosome 4RL, which is also a hotspot of restoration in other Triticeae. Marker-based introgression into elite rye materials led to a yield penalty and taller progenies. The Rfp1 gene of IRAN IX was fine-mapped, and two linked genes of equal effects were detected. Commercial hybrids with this gene showed a similar low ergot infection when compared with population cultivars. The task of the future is to co-adapt these exotic Rfp genes to European elite gene pools by genomic-assisted breeding.
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Plants, 11 (2022), 9, 1115.
https://doi.org/10.3390/plants11091115.
ISSN: 2223-7747
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English
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630 Agriculture
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Sustainable Development Goals
BibTeX
@article{Miedaner2022,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16795},
doi = {10.3390/plants11091115},
author = {Miedaner, Thomas and Korzun, Viktor and Wilde, Peer et al.},
title = {Effective Pollen-Fertility Restoration Is the Basis of Hybrid Rye Production and Ergot Mitigation},
journal = {Plants},
year = {2022},
volume = {11},
number = {9},
}