| RRC ID |
68141
|
| 著者 |
Takahashi K, Kawai-Toyooka H, Ootsuki R, Hamaji T, Tsuchikane Y, Sekimoto H, Higashiyama T, Nozaki H.
|
| タイトル |
Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system.
|
| ジャーナル |
Evolution
|
| 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. Pleodorina 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.
|
| 巻・号 |
75(11)
|
| ページ |
2984-2993
|
| 公開日 |
2021-11-1
|
| DOI |
10.1111/evo.14306
|
| PMID |
34250602
|
| PMC |
PMC9291101
|
| MeSH |
Biological Evolution*
Female
Haploidy
Humans
Male
Phenotype
Reproduction*
|
| IF |
3.698
|
| リソース情報 |
| 藻類 |
NIES-4480
NIES-4481
NIES-4482
NIES-4483
NIES-4484
NIES-456
NIES-460
NIES-541
NIES-544
NIES-731
NIES-732
NIES-872
NIES-891
NIES-892
NIES-1362
NIES-1363
NIES-2569
NIES-3382
NIES-3383
NIES-3780
NIES-3782
NIES-4068
NIES-4479 |
