Three crocodilian genomes reveal ancestral patterns of evolution among archosaurs.
Three crocodilian genomes reveal ancestral patterns of evolution among archosaurs.
复制标题
DOI:
10.1126/science.1254449
复制
发表时间:
2014-12-12
期刊:
影响因子:
--
通讯作者:
Ray DA
中科院分区:
文献类型:
--
作者:
Green RE;Braun EL;Armstrong J;Earl D;Nguyen N;Hickey G;Vandewege MW;St John JA;Capella-Gutiérrez S;Castoe TA;Kern C;Fujita MK;Opazo JC;Jurka J;Kojima KK;Caballero J;Hubley RM;Smit AF;Platt RN;Lavoie CA;Ramakodi MP;Finger JW Jr;Suh A;Isberg SR;Miles L;Chong AY;Jaratlerdsiri W;Gongora J;Moran C;Iriarte A;McCormack J;Burgess SC;Edwards SV;Lyons E;Williams C;Breen M;Howard JT;Gresham CR;Peterson DG;Schmitz J;Pollock DD;Haussler D;Triplett EW;Zhang G;Irie N;Jarvis ED;Brochu CA;Schmidt CJ;McCarthy FM;Faircloth BC;Hoffmann FG;Glenn TC;Gabaldón T;Paten B;Ray DA
To provide context for the diversifications of archosaurs, the group that includes crocodilians, dinosaurs and birds, we generated draft genomes of three crocodilians, Alligator mississippiensis (the American alligator), Crocodylus porosus (the saltwater crocodile), and Gavialis gangeticus (the Indian gharial). We observed an exceptionally slow rate of genome evolution within crocodilians at all levels, including nucleotide substitutions, indels, transposable element content and movement, gene family evolution, and chromosomal synteny. When placed within the context of related taxa including birds and turtles, this suggests that the common ancestor of all of these taxa also exhibited slow genome evolution and that the relatively rapid evolution of bird genomes represents an autapomorphy within that clade. The data also provided the opportunity to analyze heterozygosity in crocodilians, which indicates a likely reduction in population size for all three taxa through the Pleistocene. Finally, these new data combined with newly published bird genomes allowed us to reconstruct the partial genome of the common ancestor of archosaurs providing a tool to investigate the genetic starting material of crocodilians, birds, and dinosaurs.
登录
查看更多内容
影响因子:
5.8
作者:
Hickey, Glenn;Paten, Benedict;Haussler, David
通讯作者:
Haussler, David
影响因子:
5.4
作者:
Chiari Y;Cahais V;Galtier N;Delsuc F
通讯作者:
Delsuc F
影响因子:
12.3
作者:
Gabaldón T
通讯作者:
Gabaldón T
影响因子:
2.7
作者:
BLUEWEISS, L;FOX, H;SAMS, S
通讯作者:
SAMS, S
影响因子:
9.5
作者:
Hubisz, Melissa J.;Pollard, Katherine S.;Siepel, Adam
通讯作者:
Siepel, Adam