Dataset Information

The complete mitochondrial genome of the cryptic species (Form II) in kuruma shrimp Marsupenaeus japonicus (Decapoda: Penaeidae).

ABSTRACT: The Kuruma shrimp M. japonicus is economic important species in the shrimp fishery and aquaculture. However, it is a species complex consisting of two cryptic species (Form I and Form II), which can be difficult to identify based on morphology. Here, we report the complete mitochondrial genome sequence of M. japonicus (Form II) from Beibu Bay. The mitogenome has 15,966 base pairs and made up of total of 37 genes (13 protein-coding, 22 transfer RNAs and 2 ribosomal RNAs), and a putative control region. There were 1029 mutations sites between these two cryptic species, and the most variable sites were putative control region. This study adds a distinct mitogenome of M. japonicus (Form II) and will provide useful genetic information for future genetic variation identification and genetic diversity evaluation of this economic valuable shrimp.

SUBMITTER: Zhong S

PROVIDER: S-EPMC7800321 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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The complete mitochondrial genome of the cryptic species (Form II) in kuruma shrimp Marsupenaeus japonicus (Decapoda: Penaeidae).

Zhong Shengping S Zhao Yanfei Y Wang Xianfeng X Song Zhifei Z Zhang Qin Q Chen Xiuli X

Mitochondrial DNA. Part B, Resources 20180210 1

The Kuruma shrimp M. japonicus is economic important species in the shrimp fishery and aquaculture. However, it is a species complex consisting of two cryptic species (Form I and Form II), which can be difficult to identify based on morphology. Here, we report the complete mitochondrial genome sequence of M. japonicus (Form II) from Beibu Bay. The mitogenome has 15,966 base pairs and made up of total of 37 genes (13 protein-coding, 22 transfer RNAs and 2 ribosomal RNAs), and a puta ...[more]

PMID: 33490495

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Project description:BackgroundHigher crustaceans (class Malacostraca) represent the most species-rich and morphologically diverse group of non-insect arthropods and many of its members are commercially important. Although the crustacean DNA sequence information is growing exponentially, little is known about the genome organization of Malacostraca. Here, we constructed a bacterial artificial chromosome (BAC) library and performed BAC-end sequencing to provide genomic information for kuruma shrimp (Marsupenaeus japonicus), one of the most widely cultured species among crustaceans, and found the presence of a redundant sequence in the BAC library. We examined the BAC clone that includes the redundant sequence to further analyze its length, copy number and location in the kuruma shrimp genome.ResultsMj024A04 BAC clone, which includes one redundant sequence, contained 27 putative genes and seemed to display a normal genomic DNA structure. Notably, of the putative genes, 3 genes encode homologous proteins to the inhibitor of apoptosis protein and 7 genes encode homologous proteins to white spot syndrome virus, a virulent pathogen known to affect crustaceans. Colony hybridization and PCR analysis of 381 BAC clones showed that almost half of the BAC clones maintain DNA segments whose sequences are homologous to the representative BAC clone Mj024A04. The Mj024A04 partial sequence was detected multiple times in the kuruma shrimp nuclear genome with a calculated copy number of at least 100. Microsatellites based BAC genotyping clearly showed that Mj024A04 homologous sequences were cloned from at least 48 different chromosomal loci. The absence of micro-syntenic relationships with the available genomic sequences of Daphnia and Drosophila suggests the uniqueness of these fragments in kuruma shrimp from current arthropod genome sequences.ConclusionsOur results demonstrate that hyper-expansion of large DNA segments took place in the kuruma shrimp genome. Although we analyzed only a part of the duplicated DNA segments, our result suggested that it is difficult to analyze the shrimp genome following normal analytical methodology. Hence, it is necessary to avoid repetitive sequence (such as segmental duplications) when studying the other unique structures in the shrimp genome.

Dataset Information

The complete mitochondrial genome of the cryptic species (Form II) in kuruma shrimp Marsupenaeus japonicus (Decapoda: Penaeidae).

Publications

The complete mitochondrial genome of the cryptic species (Form II) in kuruma shrimp <i>Marsupenaeus japonicus</i> (Decapoda: Penaeidae).

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