3 years ago

Characterization of conserved circular RNA in polyploid Gossypium species and their ancestors

Sai Li, Min Xu, Luyao Wang, Ting Zhao, Baoliang Zhou, Xueying Guan
Circular RNA (circRNA) is a regulatory class of long, non-coding RNA found in both plant and animal kingdoms. The profile and characterization of circRNA in cotton species remains to be explored. Here, using 24 rRNA-depleted RNA-seq libraries of putative diploid progenitors of Gossypium spp., G. arboreum and G. raimondii, their interspecies hybrid (F1) and allotetraploid G. hirsutum, 1,041, 1,478, 1,311 and 499 circRNAs were identified in each cotton species, respectively. A prevalence of 23 exon-circRNAs contain non-canonical GT/AG signals, and only ~10% of exon-circRNA is associated with reverse complementary intronic sequences. This result implies that plants employ a method of circRNA splicing distinct from that of animals. In addition, 432 circRNAs are stably expressed in multiple cotton species. This article is protected by copyright. All rights reserved.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/1873-3468.12868

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