Frère Saint-Jacques...

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+[[!meta title="Scallop genome provides insights into evolution of bilaterian karyotype and development."]]
+[[!tag genome synteny]]
+
+Wang S, Zhang J, Jiao W, Li J, Xun X, Sun Y, Guo X, Huan P, Dong B, Zhang L, Hu X, Sun X, Wang J, Zhao C, Wang Y, Wang D, Huang X, Wang R, Lv J, Li Y, Zhang Z, Liu B, Lu W, Hui Y, Liang J, Zhou Z, Hou R, Li X, Liu Y, Li H, Ning X, Lin Y, Zhao L, Xing Q, Dou J, Li Y, Mao J, Guo H, Dou H, Li T, Mu C, Jiang W, Fu Q, Fu X, Miao Y, Liu J, Yu Q, Li R, Liao H, Li X, Kong Y, Jiang Z, Chourrout D, Li R, Bao Z.
+
+Nat Ecol Evol. 2017 Apr 3;1(5):120. doi:10.1038/s41559-017-0120
+
+Scallop genome provides insights into evolution of bilaterian karyotype and development.
+
+[[!pmid 28812685 desc="“The final [SOAPdenovo] assembly is 988 Mb, with a contig N50 size of 38 kb and a scaffold N50 size of 804 kb.”  “With the aid of a high-density linkage map (7,489 markers) constructed by using the 2b-RAD methodology, 1,419 scaffolds (covering ~81% of the assembly) are assigned to the 19 haploid chromosomes.”  “The scallop genome encodes 26,415 protein-coding genes.”  “Phylogenetic analysis with 482 highly conserved, single-copy genes show that the scallop lineage diverged around ~425 Ma from the lineage leading to Pacific oyster and pearl oyster. Based on the sister taxon relationship between Bivalvia and Gastropoda, our phylogenetic analysis gives an estimation of 504 Ma for the appearance of the bivalve lineage or its divergence from the gastropod lineage.”  “Chromosome-based macrosynteny analysis reveals a near-perfect correspondence between the 19 scallop chromosomes and the 17 presumed bilaterian ancestral linkage groups.”  “ParaHox and Hox clusters are well-preserved and remain intact in the scallop genome.”"]]

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@@ -12,6 +12,10 @@ breakpoints to be in open regions (ENCODE) interacting with each other (Hi-C).
 The ancestral chordate has 17 chromosomes according to amphioxus assemblies of
 [[Putnam and coll, 2008|biblio/18563158]] and [[Simakov and coll., 2020|biblio/32313176]].
 
+The scallop genome has 19 chromosomes, which are syntenic to the 17 ancestral
+chordate chromosomes.  _Drosophila_ has no synteny with scallop, but _C.
+elegans_ still has some [[Wang and coll., 2017|biblio/28812685]].
+
 The ancestral amniote has 49 chromosomes according to [[Sacerdot and coll., 2018|biblio/30333059]].
 
 [[Renschler and coll. (2019)|biblio/31601616]] found 20 synteny breakpoints