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RISS 인기검색어
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- 저자 : Maryam Jehangir (검색결과 2 건)
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A genomic glimpse of B chromosomes in cichlids
Cesar Martins,Maryam Jehangir 한국유전학회 2021 Genes & Genomics Vol.43 No.3
Background B chromosomes (Bs) are extra karyotype elements in addition to A chromosomes and are found in all major eukaryotic taxa. Among hundreds of investigated species, cichlid fshes have emerged as an interesting group of model and have contributed to unravel the complex biology of B chromosome. Objective We review the current state of knowledge on B chromosome investigation in cichlid fsh and discuss the recent genomic advances over gene and sequences hunting on Bs and their impact on the current concept of B chromosomes. Results The Bs of cichlids have been under the subject of classical cytogenetics and high scale DNA, RNA and epigenetics analysis and a list of B chromosome genes and functional sequences has been generated. B chromosomes of cichlids are restricted to females in some species and are enriched with genes, relics of genes, transposable elements and sequences transcribing for many signifcant biological functions. Diverse potentially functional sequences have been described in the B chromosome of cichlids and could infuence important biological characteristics as well seems to afect transcription and epigenetic modifcations of the whole genome. Conclusion One of the most enigmatic characteristics of Bs in cichlids is their genic content related to cell cycle and chromosome structure, and their infuence over sex rates. The relationship of Bs with cell cycle and sex determination looks like to be connected with the drive of the Bs during cell divisions.
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Kornsorn Srikulnath,Worapong Singchat,Nararat Laopichienpong,Syed Farhan Ahmad,Maryam Jehangir,Navapong Subpayakom,Aorarat Suntronpong,Kornsuang Jangtarwan,Tavun Pongsanarm,Thitipong Panthum,Nattakan 한국유전학회 2021 Genes & Genomics Vol.43 No.2
Background The Siamese fghting fsh (Betta splendens, also known as the betta) is well known in aquarium markets, and also presents an exciting new research model for studying parental care, aggressive behavior, and cryptically diverse pigmentation. However, concentrated eforts are required, both in the context of conservation biology and in its genetics, to address the problems of ongoing outbreeding depression, loss of biodiversity, and lack of scientifc biological information. Objective The evolutionary dynamics of the betta must be better understood at the genomic scale in order to resolve the phylogenetic status of unrecognized species, develop molecular markers to study variation in traits, and identify interesting sets of genes encoding various bioresource functions. Methods The recent revolution in multi-omics approaches such as genomics, transcriptomics, epigenomics, and proteomics has uncovered genetic diversity and gained insights into many aspects of betta bioresources. Results Here, we present current research and future plans in an ongoing megaproject to characterize the betta genome as de novo assemblies, genes and repeat annotations, generating data to study diverse biological phenomena. We highlight key questions that require answers and propose new directions and recommendations to develop bioresource management to protect and enhance the betta genus. Conclusion Successful accomplishment of these plans will allow the creation of a reference annotated genome and provide valuable information at the molecular level that can be utilized to sustain biodiversity and eco-management of the betta to improve breeding programs for future biomedical research.
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