10.3389/fgene.2018.00386.s001
Liu Cao
Liu
Cao
QinBo Qin
QinBo
Qin
Qiong Xiao
Qiong
Xiao
HongTing Yin
HongTing
Yin
Jin Wen
Jin
Wen
QiWen Liu
QiWen
Liu
Xu Huang
Xu
Huang
YangYang Huo
YangYang
Huo
Min Tao
Min
Tao
Chun Zhang
Chun
Zhang
Kaikun Luo
Kaikun
Luo
ShaoJun Liu
ShaoJun
Liu
Image_1_Nucleolar Dominance in a Tetraploidy Hybrid Lineage Derived From Carassius auratus red var. () × Megalobrama amblycephala ().jpg
Frontiers
2018
nucleolar dominance
distant hybridization
polyploid hybrid progeny
45S rRNA gene
tetraploidization
2018-09-24 11:51:58
Figure
https://frontiersin.figshare.com/articles/figure/Image_1_Nucleolar_Dominance_in_a_Tetraploidy_Hybrid_Lineage_Derived_From_Carassius_auratus_red_var_Megalobrama_amblycephala_jpg/7122725
<p>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 F<sub>1</sub> allotetraploids (4n = 148) and F<sub>2</sub> 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 F<sub>1</sub> hybrids and it was inherited in F<sub>2</sub> hybrids, suggesting that tetraploidization can lead to rapid establishment of nucleolar dominance in the hybrid origin’s tetraploid lineage. These results extend the knowledge of nucleolar dominance in polyploidy hybrid animals, which are of significance for the evolution of hybrids in vertebrates.</p>