Comprehensive transcriptome study to develop molecular resources of the copepod Calanus sinicus for their potential...

Area of Science:

• Marine Biology
• Genomics
• Zooplankton Ecology

Background:

• Calanus sinicus is a dominant zooplankton in Northwest Pacific margin seas.
• Developing molecular resources is essential for understanding its ecological role and population genetics.

Purpose of the Study:

• To develop comprehensive molecular resources for Calanus sinicus using RNA-Seq.
• To identify genetic markers like microsatellites and single nucleotide polymorphisms (SNPs).
• To lay the groundwork for future ecological and population genetics studies.

Main Methods:

• RNA sequencing (RNA-Seq) on adult Calanus sinicus using Illumina HiSeq 2000.
• Bioinformatic analysis for assembly, gene annotation, and identification of microsatellites and SNPs.
• SNP validation using the melting temperature (Tm)-shift method.

Main Results:

• Generated 69,751 contigs from 58.9 million reads.
• Identified 43,417 unigene hits, revealing genes involved in stress response and lipid metabolism.
• Discovered 4,871 microsatellites and 110,137 SNPs, with 16 validated primer pairs showing polymorphism.

Conclusions:

• RNA-Seq is effective for rapid molecular resource development in non-model organisms like C. sinicus.
• The identified and validated SNPs provide valuable tools for population genetics and ecological analyses.
• This study significantly advances the molecular toolkit for Calanus sinicus research.