TY - JOUR
T1 - Independent evolution of satellite DNA sequences in homologous sex chromosomes of Neotropical armored catfish (Harttia)
AU - Sassi, Francisco de M.C.
AU - Garrido-Ramos, Manuel A.
AU - Utsunomia, Ricardo
AU - dos Santos, Rodrigo Zeni
AU - Ezaz, Tariq
AU - Deon, Geize A.
AU - Porto-Foresti, Fábio
AU - Liehr, Thomas
AU - Cioffi, Marcelo de B.
N1 - Publisher Copyright:
© The Author(s) 2025.
PY - 2025
Y1 - 2025
N2 - The Neotropical armored catfish Harttia is a valuable model for studying sex chromosome evolution, featuring two independently evolved male-heterogametic systems. This study examined satellitomes—sets of satellite DNAs—from four Amazonian species: H. duriventris (X1X2Y), H. rondoni (XY), H. punctata (X1X2Y), and H. villasboas (X1X2Y). These species share homologous sex chromosomes, with their satellitomes showing a high number of homologous satellite DNAs (satDNAs), primarily located on centromeres or telomeres, and varying by species. Each species revealed a distinct satDNA profile, with independent amplification and homogenization events occurring, suggesting an important role of these repetitive sequences in sex chromosome differentiation in a short evolutionary time, especially in recently originated sex chromosomes. Whole chromosome painting and bioinformatics revealed that in Harttia species without heteromorphic sex chromosomes, a specific satDNA (HviSat08-4011) is amplified in the same linkage group associated with sex chromosomes, suggesting an ancestral system. Such sequence (HviSat08-4011) has partial homology with the ZP4 gene responsible for the formation of the egg envelope, in which its role is discussed. This study indicates that these homologous sex chromosomes have diverged rapidly, recently, and independently in their satDNA content, with transposable elements playing a minor role when compared their roles on autosomal chromosome evolution.
AB - The Neotropical armored catfish Harttia is a valuable model for studying sex chromosome evolution, featuring two independently evolved male-heterogametic systems. This study examined satellitomes—sets of satellite DNAs—from four Amazonian species: H. duriventris (X1X2Y), H. rondoni (XY), H. punctata (X1X2Y), and H. villasboas (X1X2Y). These species share homologous sex chromosomes, with their satellitomes showing a high number of homologous satellite DNAs (satDNAs), primarily located on centromeres or telomeres, and varying by species. Each species revealed a distinct satDNA profile, with independent amplification and homogenization events occurring, suggesting an important role of these repetitive sequences in sex chromosome differentiation in a short evolutionary time, especially in recently originated sex chromosomes. Whole chromosome painting and bioinformatics revealed that in Harttia species without heteromorphic sex chromosomes, a specific satDNA (HviSat08-4011) is amplified in the same linkage group associated with sex chromosomes, suggesting an ancestral system. Such sequence (HviSat08-4011) has partial homology with the ZP4 gene responsible for the formation of the egg envelope, in which its role is discussed. This study indicates that these homologous sex chromosomes have diverged rapidly, recently, and independently in their satDNA content, with transposable elements playing a minor role when compared their roles on autosomal chromosome evolution.
UR - http://www.scopus.com/inward/record.url?scp=105001503047&partnerID=8YFLogxK
U2 - 10.1038/s42003-025-07891-6
DO - 10.1038/s42003-025-07891-6
M3 - Article
C2 - 40159539
AN - SCOPUS:105001503047
SN - 2399-3642
VL - 8
SP - 1
EP - 14
JO - Communications biology
JF - Communications biology
IS - 1
M1 - 524
ER -