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A simple way to visualize detailed phylogenetic tree of huge genomewide SNP data constructed by SNPhylo
YANG Hai-long, DONG Le, WANG Hui, LIU Chang-lin, LIU Fang, XIE Chuan-xiao
2018, 17 (09): 1972-1978.   DOI: 10.1016/S2095-3119(18)62023-4
Abstract610)      PDF (10046KB)(470)      
Phylogenetic trees based on genome-wide single nucleotide polymorphisms (SNPs) among diverse inbreds could provide valuable and intuitive information for breeding and germplasm management in crops.  As a result of sequencing technology developments, a huge amount of whole genome SNP data have become available and affordable for breeders.  However, it is a challenge to perform quick and reliable plotting based on the huge amount of SNP data.  To meet this goal, a visualization pipeline was developed and demonstrated based on publicly available SNP data from the current important maize inbred lines, including temperate, tropical, sweetcorn, and popcorn.  The detailed phylogenetic tree plotted by our pipeline revealed the authentic genetic diversity of these inbreds, which was consistent with several previous reports and indicated that this straightforward pipeline is reliable and could potentially speed up advances in crop breeding.
 
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3D genomic alterations during development of skeletal muscle in chicken
Zhongxian Xu, Tao Wang, Wei Zhu, Maosen Yang, Dong Leng, Ziyu Li, Jiaman Zhang, Pengliang Liu, Zhoulin Wu, Mengnan He, Yan Li, Hua Kui, Xue Bai, Bo Zeng, Yao Zhang, Qing Zhu, Xiaoling Zhao, Mingzhou Li, Diyan Li
DOI: 10.1016/j.jia.2024.03.052 Online: 16 April 2024
Abstract35)      PDF in ScienceDirect      
The development of skeletal muscle are complicated processes involving genes responsible for proper muscle morphology, contractility, cell proliferation, differentiation, interactions, migration, and death. The three-dimensional chromatin architecture of skeletal muscle development has not been studied intensively although dynamic transcriptional regulation during differentiation of muscle cells is one of the most deeply studied processes. The RNA-seq was used to analyze the transcriptome pattern during chicken muscle development across 12 stages. Hi-C was used to build a chromatin architectures during four representative stages. ChIP-seq was conducted to identify enhancers in these four stages, which are occupied by histone H3K27ac and H3K4me3 peaks. Results show that large-scale genome architecture changes are mostly unidirectional, and coupled by complex on/off dynamic patterns of gene expression. Specifically, we observed 258.30 Mb of the genome undergoing A/B compartment switching. Notable alterations (316.57 Mb) of interaction frequencies within TADs were observed. Substantial aging-associated genes exhibited ascending connectivity with the compartment transition from repressive to active status during muscle development. Some muscle-related gene promoters that interacted with active enhancers during development, and some myopathy/aging-associated genes that were activated in aging muscle were founded. These results provide key insights into skeletal muscle development in vivo, and offer a valuable resource that allows in-depth functional characterization of candidate genes.
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