| Literature DB >> 36229611 |
Xiaopeng Sun1,2, Yanli Xiang1, Nannan Dou1,2, Hui Zhang3, Surui Pei4, Arcadio Valdes Franco5, Mitra Menon6, Brandon Monier5, Taylor Ferebee5, Tao Liu4, Sanyang Liu4, Yuchi Gao4, Jubin Wang3, William Terzaghi7, Jianbing Yan1,2, Sarah Hearne8, Lin Li9,10, Feng Li11,12, Mingqiu Dai13,14.
Abstract
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.Entities:
Year: 2022 PMID： 36229611 DOI： 10.1038/s41587-022-01470-4
Source DB: PubMed Journal: Nat Biotechnol ISSN： 1087-0156 Impact factor: 68.164