Cytological Studies of<i>Achaetobonellia Maculata</i>Fisher (Echiura: Bonellidae)

Singhal, R. N.; DattaGupta, A.K.

doi:10.1080/00087114.1980.10796859

Cited by 1 publication

(2 citation statements)

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“…Studies on the chromosomes in echiurans are very limited, and all of them were conducted several decades ago (Griffin 1899, Lefevre 1907, Singhal and Dattagupta 1980). The only one study of the karyotype was performed in a Bonellidae species, Achaetobonelliamaculata Fisher, 1953, (Singhal and Dattagupta 1980), which has 2n = 20 (10m), whereas others were focusing on the status and motion of chromosomes during cell division. Until now, no more karyotypic information of echiurans has been investigated.…”

Section: Discussionmentioning

confidence: 99%

“…Chromosome karyotype and genome size are two important cytogenetic characteristics and have been applied widely in taxonomic, phylogenetic and evolutionary studies (Ipucha et al 2007, Kashmenskaya and Polyakov 2008, Leitão et al 2010, Palomina et al 2017). Regrettably, only very few studies about chromosomes in the echiuran worms are available (Griffin 1899, Lefevre 1907, Singhal and Dattagupta 1980), which were reported several decades ago, and no report was related to their genome size. Therefore, these basic cytogenetic characteristics of echiurans need to be revealed urgently.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of chromosome karyotype and genome size in echiuran Urechis unicinctus Drasche, 1880 (Polychaeta, Urechidae)

Qin

Liu

et al. 2019

CCG

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Karyotype and genome size are two primary cytogenetic characteristics of species, which are of great significance to the study of cytogenetics, taxonomy, phylogenesis, evolution as well as molecular biology. However, this basic cytogenetic information in echiurans is lacking. Therefore, we analyzed characteristics of karyotype and genome size in the echiuran worm Urechisunicinctus Drasche, 1880. In this study, coelomic cells of U.unicinctus were used for analyzing the genome size by a flow cytometry with chicken erythrocytes as DNA standard, and the 2C DNA content was determined to be 1.85 pg, which was corresponded to the genome size of 904.58 Mbp approximately. Furthermore, trochophores of U.unicinctus were dissociated and cells were utilized for preparing the chromosomes stained with DAPI, and the karyotype was determined as 2n = 30 (10m + 6sm + 6st + 8t), FN=52. Our data provided the basic cytogenetic information of U.unicinctus, which could be utilized in taxonomic study and whole-genome sequencing in future.

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