The role of transposon inverted repeats in balancing drought tolerance and yield-related traits in maize
The role of transposon inverted repeats in balancing drought tolerance and yield-related traits in maize
复制标题
转座子反向重复序列在平衡玉米耐旱性和产量相关性状中的作用
DOI：
10.1038/s41587-022-01470-4
复制
发表时间：
2022-10
影响因子：
46.9
通讯作者：
Mingqiu Dai
中科院分区：
文献类型：
--
作者：
Xiaopeng Sun;Yanli Xiang;Nannan Dou;Hui Zhang;Surui Pei;Arcadio Valdes Franco;Mitra Menon;Br;on Monier;Taylor Ferebee;Tao Liu;Sanyang Liu;Yuchi Gao;Jubin Wang;William Terzaghi;Jianbing Yan;Sarah Hearne;Lin Li;Feng Li;Mingqiu Dai
玉米环境适应性和产量相关性状选择的基因组基础仍然知之甚少。在这里，我们对干燥和潮湿条件下全球玉米多样性小组的小RNA（sRNA）转录组（sRNAome）和转录组景观进行了全基因组分析，并发现了数十个环境特异性调控热点。对8号染色体上干旱相关环境特异性超级eQTL热点（DRESH 8）和ZmMYBR 38（DRESH 8衍生的小干扰RNA的靶标）的转基因和分子研究揭示了一个转座元件介导的反向重复序列（TE-IR）衍生的sRNA和基因调控网络，该网络平衡了植物耐旱性与产量相关性状。全基因组扫描显示，TE-IRs与干旱反应和产量相关性状相关，这些性状在玉米驯化过程中被积极选择和扩展。这些结果表明，TE-IR介导的转录后调控是作物环境适应性和产量相关性状之间权衡的关键分子机制，为培育具有更高抗逆性但产量不受影响的作物提供了潜在的基因组靶点。
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 ofDrought-Related Environment-specific Super eQTL Hotspot on chromosome 8(DRESH8) andZmMYBR38, a target ofDRESH8-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.
登录
查看更多内容
使用源自优良水稻杂交种的实验群体分析 sRNA 数量变异的遗传基础
影响因子：
7.7
作者：
Wang J;Yao W;Zhu D;Xie W;Zhang Q
通讯作者：
Zhang Q
DOI：
10.1073/pnas.052125199
发表时间：
2002-04-30
影响因子：
11.1
作者：
Matsuoka, Y;Vigouroux, Y;Doebley, J
通讯作者：
Doebley, J
影响因子：
7
作者：
Chen, Hua;Patterson, Nick;Reich, David
通讯作者：
Reich, David
影响因子：
30.8
作者：
SanMiguel, P;Gaut, BS;Bennetzen, JL
通讯作者：
Bennetzen, JL
影响因子：
27.5
作者：
Li, Chunhui;Song, Wei;Zhao, Jiuran
通讯作者：
Zhao, Jiuran