From: Charles Plessy Date: Tue, 27 Aug 2019 07:58:30 +0000 (+0900) Subject: Karyotype X-Git-Url: https://source.charles.plessy.org/?a=commitdiff_plain;h=96f13c4ff0e66b040c7358d89e0609165dafcc6e;p=source.git Karyotype --- diff --git a/tags/Oikopleura.mdwn b/tags/Oikopleura.mdwn index 09dc703f..58c41be5 100644 --- a/tags/Oikopleura.mdwn +++ b/tags/Oikopleura.mdwn @@ -54,19 +54,27 @@ Phylogeny - CO1 DNA of _B. mcnutti_ and _B. strygius_ are ~12% different ([[Sherlock and coll., 2017|biblio/28042175]]). -Genome +Karyotype ------ - - Germ cells contain 3 haploid chromosomes ([[Körner, 1952|biblio/43261846]]). + - In individuals sampled in the Wadden sea, [[Körner, 1952|biblio/43261846]] + reported that germ cells contain 3 haploid chromosomes. This is a low number in the animal reign, although at least one mammal has a similar number ([[Wurster and Benirschke 1970|biblio/5444269]]), and some insects have even less. - There are also intriguing observations of somatic mitotic cells with 7 - chromosomes ([[Körner, 1952|biblio/43261846]]) and meiotic cells with - 8 haploid chromosomes ([[Colombera & Fenaux, 1973|biblio/10.1080_11250007309429248]]). + - There are also intriguing observations of somatic mitotic cells with 7 + chromosomes ([[Körner, 1952|biblio/43261846]]) + - In individuals captured in Villefranche-sur-Mer (Mediterranean sea), + meiotic cells were reported to have8 haploid chromosomes + by [[Colombera & Fenaux, 1973|biblio/10.1080_11250007309429248]]. - Several manuscripts using animals from the SARS laboratory include fluorescent microscopy pictures supporting the 3 × 2 karyotype. For instance: centromere marking in [[Feng and coll., 2019|biblio/31306061]]. - Each cell only contains 70 fg of DNA ([Animal Genome Size Database](http://www.genomesize.com/result_species.php?id=1308)). + + +Genome +------ + - Genome size estimated to 72 ± 13 Mb (min 32.6~65 Mb) by [[Seo et al, 2001|biblio/11752568]]. A 70.4 Mb genome "reference assembly" was later produced from the shotgun sequencing of sperm DNA from ~200 partially inbred