Karyotype Evolution: Concepts and Applications

Resende, Kátia Ferreira Marques de

doi:10.1007/978-81-322-3673-3_9

Cited by 6 publications

(2 citation statements)

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“…Despite the availability of molecular and morphological data, the cytogenetic information, which is known to significantly help to understand the relationship and delimitation among taxa [ 7 ], is limited in the tribe Sobralieae, with only three chromosome counts available until now: two Sobralia species, S. liliastrum Lindl. and S. sessilis Lindl., with 2 n = 2x = 48, and one Elleanthus , E. brasiliensis (Lindl.)…”

Section: Introductionmentioning

confidence: 99%

Chromosome Number and Genome Size Evolution in Brasolia and Sobralia (Sobralieae, Orchidaceae)

Baranow

Rojek

Dudek

et al. 2022

IJMS

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Despite the clear circumscription of tribe Sobralieae (Orchidaceae), its internal relationships are still dubious. The recently delimited genus Brasolia, based on previous Sobralia species, is now assumed to be paraphyletic, with a third genus, Elleanthus, nested in it. The morphology of these three genera is significantly different, indicating the necessity of new data for a better genera delimitation. Though morphology and molecular data are available, cytogenetics data for Sobralieae is restricted to two Sobralia and one Elleanthus species. Aiming to evaluate the potential of cytogenetic data for Brasolia-Elleanthus-Sobralia genera delimitation, we present chromosome number and genome size data for 21 and 20 species, respectively, and used such data to infer the pattern of karyotype evolution in these genera. The analysis allowed us to infer x = 24 as the base chromosome number and genome size of average 1C-value of 5.0 pg for the common ancestor of Brasolia-Elleanthus-Sobralia. The recurrent descending dysploidy in Sobralieae and the punctual genome upsize suggest a recent diversification in Sobralieae but did not allow differing between Brasolia and Sobralia. However, the basal position of tribe Sobralieae in the subfamily Epidendroideae makes this tribe of interest to further studies clarifying the internal delimitation and pattern of karyotype evolution.

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Section: Introductionmentioning

confidence: 99%

Chromosome Number and Genome Size Evolution in Brasolia and Sobralia (Sobralieae, Orchidaceae)

Baranow

Rojek

Dudek

et al. 2022

IJMS

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“…Chromosome studies contribute to a better understanding of the shrimp genome in various aspects. For instance, karyotypes can help to identify potential hyperploidy and aneuploidy events, while molecular cytogenetics and epigenetic markers aid in the comprehension of adaptive genome evolution [38]. A previous study suggested that changes in decapod chromosome numbers might be attributed to polyploidization [39].…”

Section: Ploidy and Chromosome Manipulation In Penaeid Shrimpmentioning

confidence: 99%

Penaeid Shrimp Chromosome Studies Entering the Post-Genomic Era

Zhang,

Xiang,

Yuan

et al. 2023

Genes

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Chromosome studies provide the foundation for comprehending inheritance, variation, systematics, and evolution. Penaeid shrimps are a group of crustaceans with great economic importance. Basic cytogenetic information obtained from these shrimps can be used to study their genome structure, chromosome relationships, chromosome variation, polyploidy manipulation, and breeding. The study of shrimp chromosomes experienced significant growth in the 1990s and has been closely linked to the progress of genome research since the application of next-generation sequencing technology. To date, the genome sequences of five penaeid shrimp species have been published. The availability of these genomes has ushered the study of shrimp chromosomes into the post-genomic era. Currently, research on shrimp cytogenetics not only involves chromosome counting and karyotyping, but also extends to investigating submicroscopic changes; exploring genome structure and regulation during various cell divisions; and contributing to the understanding of mechanisms related to growth, sexual control, stress resistance, and genome evolution. In this article, we provide an overview of the progress made in chromosome research on penaeid shrimp. We emphasize the mutual promotion between studies on chromosome structure and genome research and highlight the impact of chromosome-level assembly on studies of genome structure and function. Additionally, we summarize the emerging trends in post-genomic-era shrimp chromosome research.

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