期刊
NATURE BIOTECHNOLOGY
卷 -, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41587-022-01470-4
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资金
- National Science Foundation of China [32061143031, 91940301, 92035302]
- National Key Research and Development Program of China [2016YFD0100600]
- Fundamental Research Funds for the Central Universities of China [2662020SKY009, 2662014PY008]
- major Program of Hubei Hongshan laboratory [2021hszd008]
- Baichuan Project at the College of Life Science and Technology, Huazhong Agricultural University
This study found that transposon-associated inverted repeats play a role in drought resistance and yield-related traits in maize. Genome-wide analysis revealed a transposon-mediated posttranscriptional regulation network that balances plant drought tolerance and yield-related traits. These findings have potential implications for breeding crops with greater stress tolerance without compromising yield.
Transposon-associated inverted repeats play a role in drought resistance and yield-related traits in maize. The genomic basis underlying the selection for environmental adaptation and yield-related traits in maize remains poorly understood. Here we carried out genome-wide profiling of the small RNA (sRNA) transcriptome (sRNAome) and transcriptome landscapes of a global maize diversity panel under dry and wet conditions and uncover dozens of environment-specific regulatory hotspots. Transgenic and molecular studies of Drought-Related Environment-specific Super eQTL Hotspot on chromosome 8 (DRESH8) and ZmMYBR38, a target of DRESH8-derived small interfering RNAs, revealed a transposable element-mediated inverted repeats (TE-IR)-derived sRNA- and gene-regulatory network that balances plant drought tolerance with yield-related traits. A genome-wide scan revealed that TE-IRs associate with drought response and yield-related traits that were positively selected and expanded during maize domestication. These results indicate that TE-IR-mediated posttranscriptional regulation is a key molecular mechanism underlying the tradeoff between crop environmental adaptation and yield-related traits, providing potential genomic targets for the breeding of crops with greater stress tolerance but uncompromised yield.
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