RRC ID 69038
Author Morimoto K, Numata K, Daitoku Y, Hamada Y, Kobayashi K, Kato K, Suzuki H, Ayabe S, Yoshiki A, Takahashi S, Murata K, Mizuno S, Sugiyama F.
Title Reverse genetics reveals single gene of every candidate on Hybrid sterility, X Chromosome QTL 2 (Hstx2) are dispensable for spermatogenesis.
Journal Sci Rep
Abstract F1 hybrid progenies between related subspecies often show hybrid sterility (HS) or inviability. HS is caused by failure of meiotic chromosome synapsis and sex body formation in house mouse. Previous studies identified two HS critical genomic regions named Hstx2 on Chr X and Hst1 on Chr 17 by murine forward genetic approaches. HS gene on Hst1 was reported to be Prdm9. Intersubspecific polymorphisms of Prdm9 induce HS in hybrids, and Prdm9 null mutation leads to sterility in the inbred strain. However, HS gene on Hstx2 remains unknown. Here, using knock-out studies, we showed that HS candidate genes on Hstx2 are not individually essential for spermatogenesis in B6 strain. We examined 12 genes on Hstx2: Ctag2, 4930447F04Rik, Mir743, Mir465d, Mir465c-2, Mir465b-1, Mir465c-1, Mir465, Gm1140, Gm14692, 4933436I01Rik, and Gm6812. These genes were expressed in adult testes, and showed intersubspecific polymorphisms on expressed regions. This first reverse genetic approach to identify HS gene on Hstx2 suggested that the loss of function of any one HS candidate gene does not cause complete sterility, unlike Prdm9. Thus, the mechanism(s) of HS by the HS gene on Hstx2 might be different from that of Prdm9.
Volume 10(1)
Pages 9060
Published 2020-6-3
DOI 10.1038/s41598-020-65986-y
PII 10.1038/s41598-020-65986-y
PMID 32493902
PMC PMC7270182
MeSH Animals Crosses, Genetic Female Genome / genetics Histone-Lysine N-Methyltransferase / genetics Hybridization, Genetic / genetics Infertility / genetics* Male Mice Mice, Inbred C57BL Mice, Inbred ICR MicroRNAs / genetics Mutation / genetics Reverse Genetics / methods Spermatogenesis / genetics* X Chromosome / genetics*
IF 3.998
DNA material px330-mC/Ctag2_Up (RDB19250) px330-mC/Ctag2_Down (RDB19251) px330-mC/4930447F04Rik_Up (RDB19252) px330-mC/4930447F04Rik_Down (RDB19253) px330-mC/Mir465_cluster_Up (RDB19254) px330-mC/Mir465_cluster_Down (RDB19255) px330-mC/Gm1140_Up (RDB19256) px330-mC/Gm1140-Gm14692_Mid (RDB19257) px330-mC/Gm14692_Down (RDB19258) px330-mC/4933436l01Rik_Up (RDB19259) px330-mC/4933436l01Rik_Down (RDB19260) px330-mC/Gm6812_Up (RDB19261) px330-mC/Gm6812_Down (RDB19262)