From: Charles Plessy Date: Sat, 4 Dec 2021 05:45:04 +0000 (+0900) Subject: Café X-Git-Url: https://source.charles.plessy.org/?a=commitdiff_plain;h=fbdf5025bcd26f0b6a97c4febd9b3530c82acd76;p=source%2F.git Café --- diff --git a/biblio/17246876.mdwn b/biblio/17246876.mdwn new file mode 100644 index 00000000..d1e9ad3a --- /dev/null +++ b/biblio/17246876.mdwn @@ -0,0 +1,10 @@ +[[!meta title="Inversions in the Chromosomes of Drosophila Pseudoobscura."]] +[[!tag Drosophila variants]] + +Dobzhansky T, Sturtevant AH + +Genetics. 1938 Jan;23(1):28-64. doi:10.1093/genetics/23.1.28 + +Inversions in the Chromosomes of Drosophila Pseudoobscura. + +[[!pmid 17246876 desc="Observation of polytene chromosomes in salivary glands of hybrid _D. pseudoobscura_ crossed form different populations showed lage-scale inversions in the 3rd chromosome. The collection of haplotypes can be represented as a graph linking single inversion events. Multiple haplotypes may coexist in the same geographical region."]] diff --git a/tags/Drosophila.mdwn b/tags/Drosophila.mdwn index ca999b86..7f1fa583 100644 --- a/tags/Drosophila.mdwn +++ b/tags/Drosophila.mdwn @@ -12,6 +12,12 @@ and Nei (1995)|biblio/7739381]]) suggests that D. mel and D. pseudoobscura diverged 24.9 +/- 2.88 My ago, based on the assumption that D. picticornis and D. silvestris diverged 5.1 My ago. +Variations of the gene order in the chromosome 3 of _D. Pseudoobscura_ were +reported by [[Dobzhansky and Sturtevant|biblio/17246876]] in 1938, who could +describe them as a network of successive large-scale inversions. They also +showed that the gene order of the X2 chromosome of _D. miranda_ is homologoues +to the one of the hypothetical ancestor of chromosome 3 in _D. Pseudoobscura_. + The ITS2 sequence of Drosophila species diverged at the speed of 1.2 % per million year ([[Schlötterer and coll., 1994|biblio/8015444]]). diff --git a/tags/variants.mdwn b/tags/variants.mdwn index 3b21c19f..02a2d4fd 100644 --- a/tags/variants.mdwn +++ b/tags/variants.mdwn @@ -15,11 +15,16 @@ selection and increased genetic load in inversions and other types of variants [[Hämälä and coll., 2021|biblio/34408075]]. ~1100 small-scale inversions are estimated to have happened between _S. -cerevisiae_ and _C. albicans_ ([[|biblio/11087826]]). The authors propose that +cerevisiae_ and _C. albicans_ ([[Seoighe and coll., 2000|biblio/11087826]]). The authors propose that “successive multigene inversions” have “distrupted” the “precise arrangement” of “genes that are adjacent in one species are in the same neighborhood”. A “bias toward small inversions” is reported. +A collection of gene arrangements where each pair is related is related by a +single large-scale inversion was found by [[Dobzhansky and +Sturtevant|biblio/17246876]] in _D. pseudoobscura_. + + ### Software - _NanoSV_ ([[Cretu Stancu and coll., 2017|biblio/29109544]]) uses nanopore long