論文

査読有り 国際誌
2021年12月20日

Identification of the sex-determining factor in the liverwort Marchantia polymorpha reveals unique evolution of sex chromosomes in a haploid system.

Current biology : CB
  • Miyuki Iwasaki
  • Tomoaki Kajiwara
  • Yukiko Yasui
  • Yoshihiro Yoshitake
  • Motoki Miyazaki
  • Shogo Kawamura
  • Noriyuki Suetsugu
  • Ryuichi Nishihama
  • Shohei Yamaoka
  • Dierk Wanke
  • Kenji Hashimoto
  • Kazuyuki Kuchitsu
  • Sean A Montgomery
  • Shilpi Singh
  • Yasuhiro Tanizawa
  • Masaru Yagura
  • Takako Mochizuki
  • Mika Sakamoto
  • Yasukazu Nakamura
  • Chang Liu
  • Frédéric Berger
  • Katsuyuki T Yamato
  • John L Bowman
  • Takayuki Kohchi
  • 全て表示

31
24
開始ページ
5522
終了ページ
5532
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.cub.2021.10.023

Sex determination is a central process for sexual reproduction and is often regulated by a sex determinant encoded on a sex chromosome. Rules that govern the evolution of sex chromosomes via specialization and degeneration following the evolution of a sex determinant have been well studied in diploid organisms. However, distinct predictions apply to sex chromosomes in organisms where sex is determined in the haploid phase of the life cycle: both sex chromosomes, female U and male V, are expected to maintain their gene functions, even though both are non-recombining. This is in contrast to the X-Y (or Z-W) asymmetry and Y (W) chromosome degeneration in XY (ZW) systems of diploids. Here, we provide evidence that sex chromosomes diverged early during the evolution of haploid liverworts and identify the sex determinant on the Marchantia polymorpha U chromosome. This gene, Feminizer, encodes a member of the plant-specific BASIC PENTACYSTEINE transcription factor family. It triggers female differentiation via regulation of the autosomal sex-determining locus of FEMALE GAMETOPHYTE MYB and SUPPRESSOR OF FEMINIZATION. Phylogenetic analyses of Feminizer and other sex chromosome genes indicate dimorphic sex chromosomes had already been established 430 mya in the ancestral liverwort. Feminizer also plays a role in reproductive induction that is shared with its gametolog on the V chromosome, suggesting an ancestral function, distinct from sex determination, was retained by the gametologs. This implies ancestral functions can be preserved after the acquisition of a sex determination mechanism during the evolution of a dominant haploid sex chromosome system.

リンク情報
DOI
https://doi.org/10.1016/j.cub.2021.10.023
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/34735792
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8699743
ID情報
  • DOI : 10.1016/j.cub.2021.10.023
  • PubMed ID : 34735792
  • PubMed Central 記事ID : PMC8699743

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