#dioecy

[bettsfic]

my favorite characters on hotd are the green siblings and especially helaena (prophetic weird girl after my own heart) so i think all of my fic recs are centered on them + the power of devoted and slightly deranged little brotherism!! "those who will wait" by kinderhook, "raw" by zoe_millin_writes, and "1918" by thefudge are some of my absolute favorite modern aus but there are so many fantastic ones in that tag! "dioecy" by eternalbrook was the first fic i read for them which got me on board.

thank you for the recs! it's been a minute since i've read fic. for the past couple years i've mostly only read extremely depressing and harrowing nonfiction and i feel like i need to scrub my brain

[konjaku]

黐木[Mochinoki] Ilex integra

It was so named because birdlime was made from its bark. It is a dioecy and this one is a female plant. It produces small red fruits in early winter.

One of the three major garden trees.

[maximumworldpunkblog]

Other Bio Genders

Interestingly, all other sophonts are trioecy or quadioecy species, unlike humans who are the only dioecy sophont.

~~~~~~~

Andaika:

Male lenient simultaneous hermaphrodite. Is both male and female but has a leniency towards the male side in most parts of their physiology.

Percentage varies depending on the sophont species but always 0% in humans.

---

Échýlon:

Completely sexless. Has no reproductive organs, genitals or sex chromosomes. May appear and/or sound masculine, feminine or neutral; or some mix of them; but are not biologically male, female or any other sex. May or may not be able to reproduce asexually.

The only other bio gender that is solely found in synthoids.

---

Gynras:

Female lenient simultaneous hermaphrodite. Is both male and female but has a leniency towards the female side in most parts of their physiology.

Percentage varies depending on the sophont species but always 0% in humans.

---

Oudéter:

Neutral simultaneous hermaphrodite. Both male and female with zero leniency to either. Appearance and voice is completely neutral / androgynous.

Percentage varies depending on the sophont species but always 0% in humans.

[evoldir]

Fwd: Postdoc: GeorgeWashingtonU.BranacleSystematics

Begin forwarded message: > From: evoldir@evol.biology.mcmaster.ca > Subject: Postdoc: GeorgeWashingtonU.BranacleSystematics > Date: 4 September 2024 at 06:49:21 BST > To: rdmpage@gmail.com > > > > Postdoc in Barnacle Molecular Systematics at George Washington University > (GWU) > > About the Project > The Computational Biology Institute, at the Milken Institute School of > Public Health’s Department of Biostatistics and Bioinformatics, GWU, > is offering a Postdoc position to develop a comprehensive phylogeny of > the barnacles (Crustacea: Thecostraca) and study the evolution of sexual > systems.Barnacles rank among the most biologically diverse, ubiquitous and > ecologically important marine metazoans. They exhibit a fascinating and > unique range of sexual systems, including hermaphroditism (both sexes), > dioecy (separate sexes) and androdioecy (hermaphrodites and males).We want > to apply exon probes for targeted capture sequencing to ~1,200 barnacle > species to build a robust phylogeny of the Thecostraca. Then coupling this > barnacle tree with fossil, morphological and ecological information in > a comparative analysis framework, we will test long-standing theoretical > predictions about the evolution of sexual systems and its diversification > across broad spatial, temporal and ecological scales. > > About the Postdoc > > The postdoc candidate will conduct research in phylogenomics and > evolutionary biology of barnacles and work together with the PI (Pérez- > Losada), collaborators and graduate students. Responsibilities: > + Compilation, generation and curation of genomic and other >  (e.g., morphological and ecological) trait data for selected >  barnacle species. > + Bioinformatic analysis of genomic data to infer phylogenies and >  perform comparative analyses on traits to test hypotheses. > + Preparation and submission of manuscripts to scientific journals. > + Availability to travel to other institutions and work abroad for short >  periods of time. > + Training of graduate and undergraduate students in the lab on the above- >  mentioned duties. > + Delivering guest lectures or short workshops for relevant courses and >  related topics offered at GW in the disciplines involved in the >  research program. > > Qualifications > > PhD and expertise in molecular systematics, bioinformatics, comparative > phylogenetic methods, genomics and ideally barnacle taxonomy. > > Hiring Range > 61,008 - 65,000 > > Expected duration of appointment > Up to 3 years renewable every year upon performance > > Starting date > October 1, 2024 > > Healthcare Benefits > GWU offers a comprehensive benefit package for Postdoc Associates and > Scholars that includes medical, dental, vision, life & disability > insurance, time off & leave, well-being and various voluntary > benefits. Postdoc Scholars may also be eligible for retirement savings > and tuition programs. For program details and eligibility, please visit > https://ift.tt/gBUfdQr. > > Applicant Documents to Submit > Cover Letter > Curriculum Vitae > Statement of Research Interest > Two Letters of Recommendation > > Online Application > > All candidates must apply online via the following GWU link > https://ift.tt/WlhZPdC > > Contact > If you have further questions regarding this position you can email > Marcos Perez-Losada at mlosada@gwu.edu > > Marcos Perez-Losada, PhD > > Marcos Perez-Losada

[popgenpapers]

Genetic insights into the dissolution of dioecy in diploid persimmon Diospyros oleifera Cheng

http://dlvr.it/SzVxS8

[bogleech]

hey random question is stinky the freshwater snail from insaniquarium transmasc?

He could be, but monoecy (the more accurate term for a "hermaphrodite" in nature) is actually not the default for gastropods! Just as many species are dioecious, meaning they have two distinct sexes! edit: monoecy/dioecy are terms people associate most with plants, but they are also used for mollusks in a lot of academic writing! I’m not sure if that extends to all other animals or not, come to think of it.

[bettsfic]

betts you 1000000% have been the writer of the Brainrot fic. also, there is nothing more than i love than sending recs!! off the top of my head, there's "dioecy" by eternalbrook (this one has a lil scene at the end that whooped my ass like it's never been whooped), "the Kinslayer & his Dreamer" by helaemond (she also has a darkfic & an OF AU which are all, affectionately, fucking INSANE), "papillion" by ladybundle, "leucoma salicis" by inclination, the entire "crisis of my faith" series by

brokentombstone, catalystcomet has 3 incredible fics for them (my fav is "the gift"), and all of missatomicbomb's fics for the pairing are also brilliant (fav is "hunting season"), along with a bunch of gems i'm probably missing and will frantically send over later. i know that was a lot to bombard with all at once but people have really been popping off! also mmmotionnn, jinniwiin, DIANAII__ on twitter have some stunning art for them (among so many others!) thank you for indulging me betts!

agh sorry for the delay posting this! i like to make sure i have everything in my marked for later list so i don't lose it (historically when people send me recs i sometimes have a hard time finding them again on my blog, so i like to make sure i have everything saved *before* i post) and things have just been busy. but! i have them all marked now and they all look amazing and i can't wait to dig into them! my favorite tag of the bunch is "sinister caretaking."

i can definitely see myself getting into this ship/fandom, maybe not as a writer because i'm so awful at canon fics* and this seems like a hard ship to make into a modern au (but i'm doing it now for rexsoka so who knows anymore) but i'm thrilled to read for it!

*i recently reread my jaime/myrcella got fic and wow for someone who never read the books idk how i managed the canon details there. definitely an anomaly.

thank you for these recs!

[ferallindsay]

we live in a dioecy

[t4t4t]

circumcision these days is mostly not morally justified, but aesthetically and bio-politically, or through a bio-politicization of aesthetics and an aestheticization of bio-politics. the uncircumcised genitalia of camabs is almost seen as feminine, and circumcision is the masculinizing process, a coming of age for camabs at birth. the curated dioecy of the europeans, the ideology of being the most patriarchal ergo most civilized ergo most masculine etc etc... dioecy and economics have a similar etymological root in the Greek word for household.

[evoldir]

Fwd: Postdoc: GeorgeWashingtonU.MolecularSystematics

Begin forwarded message: > From: evoldir@evol.biology.mcmaster.ca > Subject: Postdoc: GeorgeWashingtonU.MolecularSystematics > Date: 10 August 2024 at 05:11:52 BST > To: rdmpage@gmail.com > > > > Postdoc in Barnacle Molecular Systematics at George Washington University > (GWU) > > About the Project > The Computational Biology Institute, at the Milken Institute School of > Public Health’s Department of Biostatistics and Bioinformatics, GWU, > is offering a Postdoc position to develop a comprehensive phylogeny of > the barnacles (Crustacea: Thecostraca) and study the evolution of sexual > systems.Barnacles rank among the most biologically diverse, ubiquitous and > ecologically important marine metazoans. They exhibit a fascinating and > unique range of sexual systems, including hermaphroditism (both sexes), > dioecy (separate sexes) and androdioecy (hermaphrodites and males).We want > to apply exon probes for targeted capture sequencing to ~1,200 barnacle > species to build a robust phylogeny of the Thecostraca. Then coupling this > barnacle tree with fossil, morphological and ecological information in > a comparative analysis framework, we will test long-standing theoretical > predictions about the evolution of sexual systems and its diversification > across broad spatial, temporal and ecological scales. > > About the Postdoc > > The postdoc candidate will conduct research in phylogenomics and > evolutionary biology of barnacles and work together with the PI (Pérez- > Losada), collaborators and graduate students. Responsibilities: > - Compilation, generation and curation of genomic and other >  (e.g., morphological and ecological) trait data for selected >  barnacle species. > - Bioinformatic analysis of genomic data to infer phylogenies and >  perform comparative analyses on traits to test hypotheses. > - Preparation and submission of manuscripts to scientific journals. > - Availability to travel to other institutions and work abroad for short >  periods of time. > - Training of graduate and undergraduate students in the lab on the above- >  mentioned duties. > - Delivering guest lectures or short workshops for relevant courses and >  related topics offered at GW in the disciplines involved in the >  research program. > > Qualifications > > PhD and expertise in molecular systematics, bioinformatics, comparative > phylogenetic methods, genomics and ideally barnacle taxonomy. > > Hiring Range > 61,008 - 65,000 > > Expected duration of appointment > Up to 3 years renewable every year upon performance > > Starting date > 01/09/2024 > > Healthcare Benefits > GWU offers a comprehensive benefit package for Postdoc Associates and > Scholars that includes medical, dental, vision, life & disability > insurance, time off & leave, well-being and various voluntary > benefits. Postdoc Scholars may also be eligible for retirement savings > and tuition programs. For program details and eligibility, please visit > https://ift.tt/HF9oVA7. > > Applicant Documents to Submit > Cover Letter > Curriculum Vitae > Statement of Research Interest > Two Letters of Recommendation > > Online Application > > All candidates must apply online via the following GWU link > https://ift.tt/ypOdzxc > > Contact > If you have further questions regarding this position you can email > Marcos Perez-Losada at mlosada@gwu.edu > > Marcos Perez-Losada, PhD > > > Marcos Perez-Losada

[arcticdementor]

Presenting another ridiculous position on biology I’ve encountered

Specifically, the position that there are no dioecious species.

[botanytoo]

Sex-specific functional traits in cycads

Sex-specific functional traits in cycads

Poor man’s cycad. Wikipedia Commons, licensed under the Creative Commons Attribution-Share Alike2.0 Generic license. The Mesozoic is often referred to as the “age of cycads”. During this period, dinosaurs roamed vast cycad forests, yet modern cycads are a vestige of their Mesozoic glory. Extant species represent the oldest lineage of dioecious seed-bearing plants. This curious phylogenic position…

[drferox]

This is probally outside your expertise but Ive been having trouble finding an answer. What is the evolutionary advantage of 'male' and 'female'? (sperm/ equivalent distributor and egg bearer or whatever the definition is) Why is hermaphroditism not the norm cus wouldnt it be more optimal if you can breed with any mature member of your species instead of just (at best) half? Esp for loner animals that rarely meet. Most of all itd double the offspring if both parties fertilize each other

It’s not exactly my expertise, but it is the sort of thing the LSB and I might discuss as pillow talk. We were bio nerds. Technically still are, I guess.

The facts are that nobody probably knows for certain, but having two sexes (dioecy) predominates in the animal kingdom. It’s not the case in plants, fungi, or single celled organisms. Also once Dioecy has evolved, or hermaphrodititsm has been lost, in an evolutionary history, it’s difficult for a population to go back.

It should also go without saying, but I wills say it anyway because this is Tumblr, that when discussing hermaphrodites in this context it’s not about humans or intersex individuals, but rather about species in general.

We can assume based on the scientific knowledge already available, that the first cells weren’t divided into male and female, they were just single cells, doing their thing. And at some point they evolved into multi-cellular organisms to better gather nutrients and avoid becoming dead. Not all the cells within a multi-cellular organism reproduce, only a few go on to become what we know as gametes (the sex cells) and zygotes (the combination of two compatible sex cells).

Different species may also have different shapes and strategies for those gametes, too, not everything looks like a sperm, but a large, stationary, nutrient rich one (receiver) and a highly mobile one (donor) is a common and effective strategy, but it’s not the only one. You can get isogamous fungi species (only one type of gamete, and it’s all the same).

So if we’re talking about organisms, and you can assume I’m talking about animals from this point on as plants are not really my thing,

So if we have male and female gametes and their associated support systems, seems like a reasonable default to have both systems in an individual. And embryology of mammals suggests this, sometimes you get remnant cysts. There are duct systems for both male and female reproductive tracts in embryos, Wolffian and Mullerian, but one typically regresses during development. So that implies that at least mammal species (I just don’t know enough embryology for other groups) have hermaphroditism in their evolutionary history. So why lose it?

Hermaphroditism is an advantage for species which don’t encounter each other with much frequency, either because they don’t move very far or very much, and don’t put a lot of energy into raising their young. So for some species, like snails and earthworms, there’s an advantage. But it comes with disadvantages too.

It takes extra energy to maintain two reproductive tracts and you need to stop self-fertilization or you’re going to end up with marked inbreeding and a loss of genetic diversity fairly quickly. Some fish solve this with sequential hermaphroditism, where they are both male and female, but not at the same time. Others are just one or the other.

Now let’s say, hypothetically, you have a hermaphrodite species and one individual has a mutation which renders the female tract non-functional. It can now spend that energy it would have spent on the female reproductive tract on other ways, and if it’s something that permits it to encounter more mates (mobility, increased lifespan, better immune system, etc) then it will potentially be at a reproductive advantage and that mutation will propagate through the population.

And when you have a population that consists of hermaphrodites and males, there is now an advantage to having only a functional female reproductive tract, as you have plenty of mates around, but it is more difficult to compete with males for other mating opportunities. So it may be more efficient to have organisms that are either male or female as far as reproductive strategies go. This also allows more room for evolution of diverse form and function, and behavior.

So it’s about competing with members of the same species, and this strategy becomes more viable with a larger population, and even more with increased energy investments in offspring. Basically, if you want to think of it this way, something ‘cheated’ the hermaphrodite system and became male, and them female developed as a response to that ‘cheating’.

It’s a kind of game theory. New strategies develop to adapt to the dominant strategy in play. If everyone’s putting dragonites in Pokemon Go gyms, you level up your ice types to take them down.

Though my interest in evolution is more ‘casually enthused scientist’ these days rather than professional, an actual evolutionary biologist or embryologist might have more to say.

[jtothecurcas]

/Aucuba japonica/, アオキバ, Family Garryaceae It's been a while since the last plant post, so this time we're having two plants in the spotlight. First up is A. japonica, my first encounter with the family Garryaceae. This family of plants is distributed in warm, temperate/subtropical regions, and doesn't occur in the Philippines. The genus Aucuba itself is Native to East Asia, with the name being derived from the local アオキ葉 or アオキ. Aoki grow along shaded streams and moist thickets. Its variegated form is popular in gardens. The plant is distinguishable by its opposite, broadly lanceolate leaves with toothed margins and opposite veins. The stipules are large and also opposite [but unlike Rubiacs like coffee, not interpetiolar?]. Male and female plants in this family are separate, a condition called dioecy. Aoki flowers are arranged in cymes, and are 4-merous [having four of each part], with deep purple petals. The stamens of male flowers alternate with the petals. The ovaries of female flowers are inferior [positioned below the perianth]. Can you tell which of the photos is male or female? Floral formula Male: Ca4 Co4 A4 Female: B2 Ca4 Co4 G1inf Fruits are bright red; tantalizing but toxic! One of the Japanese garden plants closely related to Aoki is the Kousa (dogwood, Cornaceae). If you don't count gardenias and coffee. Scroll down my feed to find a related post! 🤣 Reference: Fell, Derek (1992). The essential gardener. Gramercy . . . . . . . . . . #spring #japan #aucuba #plantlove #plants #plantsofinstagram #vsco #garryaceae #gardens #sankeien #botanize (at 三溪園) https://www.instagram.com/p/Ch4j7mOhgpv/?igshid=NGJjMDIxMWI=

[evoldir]

Fwd: Graduate position: Montpellier.PlantSexChromosomes

Begin forwarded message: > From: evoldir@evol.biology.mcmaster.ca > Subject: Graduate position: Montpellier.PlantSexChromosomes > Date: 17 August 2023 at 06:02:45 BST > To: rdmpage@gmail.com > > > Dear colleagues, > > We have a three-year PhD position in a collaborative project between the > University of Montpellier (France), Biopolis (Porto, Portugal) and the ETH > Zurich (Switzerland). > > Title: Genomics of sexual systems and adaptation in an alpine plant, Silene acaulis > > Description: > The thesis will be focused on the Silene acaulis species complex, consisting of > several subspecies adapted to life at high altitudes and latitudes. While most > flowering plants have hermaphroditic flowers (with both pistils and stamens), > Silene acaulis is particular in that several subspecies have different sexual > systems, including dioecy (separate female and male plants) and gynodioecy > (separate female and hermaphroditic plants). In dioecious plants, sex can be > determined by sex chromosomes, as in many animals, but currently only few sex > chromosomes have been identified in plants, and the conditions for the evolution > of such chromosomes are currently debated. Furthermore, as dioecy imposes > outcrossing, the sexual system could have an impact on the efficacy of selection > and the capacity of a species to adapt. The existence of several sexual systems > within the S. acaulis complex offers an exciting possibility to address these > questions, using a newly assembled genome as well as DNA and RNA sequencing data > from individuals of several populations. > > Skills/requirements: > A Master degree in evolutionary biology or related fields. A first experience in > genomics and bioinformatics is required. The candidate should be able to work > independently, to organize her/his work efficiently, and should have the > capacity to communicate clearly and synthetically (oral and written > communication). The candidate should be fluent in English, and comfortable > working in an international environment. Some knowledge of French, in > particular, is helpful for extra-professional life in France. > > Thesis organization: > The thesis will be officially hosted at the GAIA Doctoral School of the > University of Montpellier and based at ISEM (Institute of Evolutionary Science > of Montpellier), and supervised by Sandrine Maurice and Jos Käfer. The thesis > will be co-supervised by Gabriel Marais at CIBIO (Porto, Portugal) and Alex > Widmer and Martin Fischer at ETH Zurich (Switzerland), and the candidate will > spend up to one year in each of these institutions. At ISEM, Sandrine Maurice > and Jos Käfer in the “Evolution and Demography” team focus on the study of rare > plants and plant reproductive systems. At CIBIO, Gabriel Marais is a specialist > in the genomics of sex chromosomes, and at ETH Zurich, Alex Widmer and Martin > Fischer of the Plant Ecological Genetics group work on sex determination and > speciation in plants. > > How to apply: > Send a motivation letter, a CV, and two contacts for reference to > jos.kafer@cnrs.fr before 31 August 2023. Selected applicants will be invited for > an online interview in September. The thesis will start between 15 October 2023 > and 1 January 2024. > > > > Jos Käfer > CNRS Research associate in evolutionary plant biology > Institut des Sciences de l'Evolution de Montpellier (ISEM) > > > Jos Käfer