Nie Shuai, Tian Xue-Chan, Kong Lei, Zhao Shi-Wei, Chen Zhao-Yang, Jiao Si-Qian, El-Kassaby Yousry A, Porth Ilga, Yang Fu-Sheng, Zhao Wei, Mao Jian-Feng
Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.
Henan Key Laboratory of Germplasm Innovation and Utilization of Eco-economic Woody Plant, Pingdingshan University, Pingdingshan, China.
Front Plant Sci. 2022 Nov 15;13:1006904. doi: 10.3389/fpls.2022.1006904. eCollection 2022.
Few incidents of ancient allopolyploidization (polyploidization by hybridization or merging diverged genomes) were previously revealed, although there is significant evidence for the accumulation of whole genome duplications (WGD) in plants. Here, we focused on Ericales, one of the largest and most diverse angiosperm orders with significant ornamental and economic value. Through integrating 24 high-quality whole genome data selected from ~ 200 Superasterids genomes/species and an algorithm of topology-based gene-tree reconciliation, we explored the evolutionary history of in Ericales with ancient complex. We unraveled the allopolyploid origin of Ericales and detected extensive lineage-specific gene loss following the polyploidization. Our study provided a new hypothesis regarding the origin of Ericales and revealed an instructive perspective of gene loss as a pervasive source of genetic variation and adaptive phenotypic diversity in Ericales.
尽管有大量证据表明植物中存在全基因组复制（WGD）的积累，但之前很少有古代异源多倍体化事件（通过杂交或合并分化的基因组进行多倍体化）被揭示。在此，我们聚焦于杜鹃花目，它是被子植物中最大且最多样化的目之一，具有重要的观赏和经济价值。通过整合从约200个超菊分支基因组/物种中挑选出的24个高质量全基因组数据以及一种基于拓扑结构的基因树比对算法，我们探索了杜鹃花目复杂的进化历史。我们揭示了杜鹃花目的异源多倍体起源，并检测到多倍体化后广泛的谱系特异性基因丢失。我们的研究为杜鹃花目的起源提供了一个新的假说，并揭示了基因丢失作为杜鹃花目遗传变异和适应性表型多样性普遍来源的一个有启发性的观点。
