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Recently, the cotton genetic improvement team of our school constructed a high-resolution three-dimensional genome structure map of cotton fiber for the first time, revealing the topological structure basis of subgenome cooperative regulation of allotetraploid cotton fiber development.
Plant cell differentiation is accompanied by remodeling of gene transcriptional regulatory networks, which is influenced by epigenetic modifications and chromatin structure
Due to the physiological particularity of cotton fiber cells, the effect of ordinary Hi-C experiments is not satisfactory, and the research on the three-dimensional genome of fibers is slow
Figure 1.
It was found that with fiber development, there were fewer actively expressed genes and fewer active chromatin modifications, and the At and Dt subgenomes had synergistic contributions to the development of allotetraploid fibers
Figure 2.
Pei Liuling and Huang Xianhui, doctoral students of the State Key Laboratory of Crop Genetic Improvement and Hubei Hongshan Laboratory, are the co-first authors of the paper, Professor Wang Maojun is the corresponding author, and Professor Zhang Xianlong participated in the project design
Reviewer: Wang Maojun
【English summary】
Background
Despite remarkable advances in our knowledge of epigenetically mediated transcriptional programming of cell differentiation in plants, little is known about chromatin topology and its functional implications in this process.
Results
To interrogate its significance, we establish the dynamic three-dimensional (3D) genome architecture of the allotetraploid cotton fiber, representing a typical single cell undergoing staged development in plants.
Conclusions
This study sheds light on the spatial-temporal asymmetric chromatin structures of two subgenomes in the cotton fiber and offers a new insight into the regulatory orchestration of cell differentiation in plants.
Original link: https://doi.
