Nucleolar Dominance in a Tetraploidy Hybrid Lineage Derived From Carassius auratus red var. () × Megalobrama amblycephala ().

ABSTRACT: Nucleolar dominance is related to the expression of 45S rRNA genes inherited from one progenitor due to the silencing of the other progenitor's rRNA genes. To investigate nucleolar dominance associated with tetraploidization, we analyzed the changes regarding the genetic traits and expression of 45S rRNA genes in tetraploidy hybrid lineage including F₁ allotetraploids (4n = 148) and F₂ autotetraploids (4n = 200) derived from the distant hybridization of Carassius auratus red var. (2n = 100) () ×Megalobrama amblycephala (2n = 48) (). Results showed that nucleolar dominance from the females was established in F₁ hybrids and it was inherited in F₂ hybrids, suggesting that tetraploidization can lead to rapid establi

SUBMITTER: Cao L 

PROVIDER: S-EPMC6166360 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature