Wu Wei, Guo Wei, Ni Guangyan, Wang Longyuan, Zhang Hui, Ng Wei Lun
College of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou, China.
Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
Front Genet. 2022 May 19;13:833406. doi: 10.3389/fgene.2022.833406. eCollection 2022.
The role of hybridization is significant in biological invasion, and thermotolerance is a trait critical to range expansions. The South American is now widespread in South China, threatening the native by competition and hybridization. Furthermore, upon formation, their F1 hybrid can quickly replace both parents. In this study, the three taxa were used as a model to investigate the consequences of hybridization on cold tolerance, particularly the effect of subgenome dominance in the hybrid. Upon chilling treatments, physiological responses and transcriptome profiles were compared across different temperature points to understand their differential responses to cold. While both parents showed divergent responses, the hybrid's responses showed an overall resemblance to but the contribution of homeolog expression bias to cold stress was not readily evident in the F1 hybrid possibly due to inherent bias that comes with the sampling location. Our findings provided insights into the role of gene expression in differential cold tolerance, and further contribute to predicting the invasive potential of other hybrids between and its congeners around the world.
杂交在生物入侵中起着重要作用，耐热性是范围扩张的关键特征。南美洲的[物种名称]目前在中国南方广泛分布，通过竞争和杂交威胁着本地的[物种名称]。此外，它们的F1杂种形成后能迅速取代双亲。在本研究中，将这三个分类群作为模型来研究杂交对耐寒性的影响，特别是杂种中亚基因组优势的作用。经过低温处理后，比较了不同温度点的生理反应和转录组图谱，以了解它们对寒冷的差异反应。虽然双亲表现出不同的反应，但杂种的反应总体上与[亲本物种名称1]相似，但在F1杂种中，同源基因表达偏向对冷胁迫的贡献可能由于采样地点固有的偏差而不太明显。我们的研究结果为基因表达在差异耐寒性中的作用提供了见解，并进一步有助于预测[物种名称]及其世界各地同属物种之间其他杂种的入侵潜力。
