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Citation for Study 28238

Citation title: "Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system".

Study name: "Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system".

This study is part of submission 28238 (Status: Published).

Citation

Takahashi K., Kawai-toyooka H., Ootsuki R., Hamaji T., Tsuchikane Y., Sekimoto H., Higashiyama T., & Nozaki H. 2021. Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system. Evolution, .

Authors

• Takahashi K. (submitter) 08050086331
• Kawai-toyooka H.
• Ootsuki R.
• Hamaji T.
• Tsuchikane Y.
• Sekimoto H.
• Higashiyama T.
• Nozaki H.

Abstract

Mating systems of haploid species such as fungi, algae, and bryophytes are either heterothallic (self-incompatible) with two sex phenotypes (male and female, or mating type minus and plus in isogamous species) or homothallic (self-compatible) with only a bisexual phenotype producing zygotes within a clone. The anisogamous volvocine green alga Pleodorina starrii is a haploid species previously reported to have a heterothallic mating system. Here, we found that two additional culture strains originating from the same water system of P. starrii were taxonomically identified as P. starrii and produced male and female gametes and zygotes within a clone (bisexual). Sequences of rapidly evolving plastid genome regions were identical between the bisexual and unisexual (male or female) P. starrii strains. Intercrossings between the bisexual and unisexual strains demonstrated normal thick-walled zygotes and high survivability of F1 strains. Thus, these strains belong to the same biological species. P. starrii has a new haploid mating system that is unique in having three sex phenotypes; namely, male, female, and bisexual. Genetic analyses suggested the existence of autosomal ?bisexual factor? locus independent of volvocine male and female determining regions. The present findings increase our understanding of the initial evolutionary step of transition from heterothallism to homothallism.

Keywords

Inbreeding; Life-History Evolution; Haploid Species; Mating Systems; Reproductive Isolation; Sex.

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S28238
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref32124,
  	 author = {Kohei  Takahashi and Hiroko  Kawai-Toyooka and Ryo  Ootsuki and Takashi  Hamaji and Yuki  Tsuchikane and Hiroyuki  Sekimoto and Tetsuya  Higashiyama and Hisayoshi  Nozaki},
  	 title = {Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system},
  	 year = {2021},
  	 keywords = {Inbreeding; Life-History Evolution; Haploid Species; Mating Systems; Reproductive Isolation; Sex.},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Evolution},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Mating systems of haploid species such as fungi, algae, and bryophytes are either heterothallic (self-incompatible) with two sex phenotypes (male and female, or mating type minus and plus in isogamous species) or homothallic (self-compatible) with only a bisexual phenotype producing zygotes within a clone. The anisogamous volvocine green alga Pleodorina starrii is a haploid species previously reported to have a heterothallic mating system. Here, we found that two additional culture strains originating from the same water system of P. starrii were taxonomically identified as P. starrii and produced male and female gametes and zygotes within a clone (bisexual). Sequences of rapidly evolving plastid genome regions were identical between the bisexual and unisexual (male or female) P. starrii strains. Intercrossings between the bisexual and unisexual strains demonstrated normal thick-walled zygotes and high survivability of F1 strains. Thus, these strains belong to the same biological species. P. starrii has a new haploid mating system that is unique in having three sex phenotypes; namely, male, female, and bisexual. Genetic analyses suggested the existence of autosomal ?bisexual factor? locus independent of volvocine male and female determining regions. The present findings increase our understanding of the initial evolutionary step of transition from heterothallism to homothallism.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 32124
  AU  - Takahashi,Kohei 
  AU  - Kawai-Toyooka,Hiroko 
  AU  - Ootsuki,Ryo 
  AU  - Hamaji,Takashi 
  AU  - Tsuchikane,Yuki 
  AU  - Sekimoto,Hiroyuki 
  AU  - Higashiyama,Tetsuya 
  AU  - Nozaki,Hisayoshi 
  T1  - Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system
  PY  - 2021
  KW  - Inbreeding; Life-History Evolution; Haploid Species; Mating Systems; Reproductive Isolation; Sex.
  UR  - http://dx.doi.org/
  N2  - Mating systems of haploid species such as fungi, algae, and bryophytes are either heterothallic (self-incompatible) with two sex phenotypes (male and female, or mating type minus and plus in isogamous species) or homothallic (self-compatible) with only a bisexual phenotype producing zygotes within a clone. The anisogamous volvocine green alga Pleodorina starrii is a haploid species previously reported to have a heterothallic mating system. Here, we found that two additional culture strains originating from the same water system of P. starrii were taxonomically identified as P. starrii and produced male and female gametes and zygotes within a clone (bisexual). Sequences of rapidly evolving plastid genome regions were identical between the bisexual and unisexual (male or female) P. starrii strains. Intercrossings between the bisexual and unisexual strains demonstrated normal thick-walled zygotes and high survivability of F1 strains. Thus, these strains belong to the same biological species. P. starrii has a new haploid mating system that is unique in having three sex phenotypes; namely, male, female, and bisexual. Genetic analyses suggested the existence of autosomal ?bisexual factor? locus independent of volvocine male and female determining regions. The present findings increase our understanding of the initial evolutionary step of transition from heterothallism to homothallism.
  L3  - 
  JF  - Evolution
  VL  - 
  IS  - 
  ER  -