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Authors: Wang, Wenlei and Chang, Jing and Zheng, Hongyan and Ji, Dehua and Xu, Yan and Chen, Changsheng and Xie, Chaotian

Pyropia haitanensis is a high-yield commercial seaweed in China. Pyropia haitanensis farms often suffer from problems such as severe germplasm degeneration, while the mechanisms underlying resistance to abiotic stresses remain unknown because of lacking genomic information. Although many previous studies focused on using next-generation sequencing (NGS) technologies, the short-read sequences generated by NGS generally prevent the assembly of full-length transcripts, and then limit screening functional genes. In the present study, which was based on hybrid sequencing (NGS and single-molecular real-time sequencing) of the P. haitanensis thallus transcriptome, we obtained high-quality full-length transcripts with a mean length of 2998 bp and an N50 value of 3366 bp. A total of 14,773 unigenes (93.52%) were annotated in at least one database, while approximately 60% of all unigenes were assembled by short Illumina reads. Moreover, we herein suggested that the genes involved in the biosynthesis of polyunsaturated fatty acids and heat shock proteins play an important role in the process of development and resistance to abiotic stresses in P. haitanensis. The present study, together with previously published ones, may facilitate seaweed transcriptome research.

Journal: Journal of applied phycology
DOI: 10.1007/s10811-018-1624-x
Year: 2019

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