Development of primers and a procedure for specific identification of the diatom <Emphasis Type="Italic">Thalassiosira weissflogii</Emphasis> |
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| Authors: | Saengchan Senapin Kornsunee Phiwsaiya Pauline Kiatmetha Boonsirm Withyachumnarnkul |
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| Institution: | (1) Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Bangkok, 10400, Thailand;(2) National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, 12120, Thailand;(3) Department of Biochemistry, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand;(4) Shrimp Genetic Improvement Center, Surat Thani, 84100, Thailand;(5) Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand; |
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| Abstract: | A recent study showed Thalassiosira weissflogii to be a diatom containing suitable nutrition for larviculture of the black tiger shrimp, Penaeus monodon. Accurate and practical identification of this diatom species is therefore important for commercial hatcheries. The purpose
of this study was to establish a DNA-based method of identification to supplement morphological examination, avoiding confusion
with other Thalassiosira sp. Primers, 18SF/28SR1, specific for ribosomal DNA genes (3′-end of 18S rDNA through 5′-end of 28S rDNA, covering two internal
transcribed spacers), were employed as a first-step polymerase chain reaction, followed by a second nested amplification using
specifically designed primers, ITS1-F-D/ITS1-R-D. The nested-PCR result revealed specificity in the detection, distinguishing
T. weissflogii from T. pseudonana, Cyclotella meneghiniana, and Chaetoceros sp., and the PCR fragment of the amplified region had a sequence that was 99% identical to the T. weissflogii sequence held by GenBank. |
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