My thesis or publication is about oncogene, somehow, my name was spelled wrong in the paper for PhD.
I use my real name here, it is insane to lie at front of public. Besides PhD, I also have MS in preventive medicine. Since I do not think any of these degree related with the topic, I do not understand your motivation. Can you tell me what kind education you have?
Endocytosis of a bacteria by a primitive eukarotic cell that led to a symbiotic relationship and continued co-existence of the two.
So, endocytosis of a bacteria is an event, it occurs instantaneously. NS works on these pre-formed symbiotic organism. Dr. Lynn Margulis's book (Acquring Genomes) is the best reference, since she is the person to propose the idea.Jianyi Zhang
Do you mean like a polyploidy event that makes for instantaneous reproductive isolation?
Yes. Besides polyploids in plants, generation of asexuals from sexual animals (generation of virgin birth animals), a few polyloids cases in animals are other evidences. Instantaneous speciation has a much bigger picture, polyploids is only one part of it.Jianyi Zhang
Loss of sexuality is an interesting evolutionary scenario that appears to have occurred more than once in some lineages. But I would not call it a common event. What kind of animals were you thinking of here ?
Instantaneous speciation has a much bigger picture, polyploids is only one part of it
I am interested. What other phenomena are you refering to ? Any references ?
But I would not call it a common event. What kind of animals were you thinking of here ?
Although most higher animals reproduce by copulation, various lower animal forms can reproduce in a parthenogenetic manner without copulation. Aphids (plant lice), some ticks, water fleas, ants, wasps, bees and certain lizards and snakes can all develop without male fertilization.
various lower animal forms can reproduce in a parthenogenetic manner
Of course. I have worked with aphids for almost 20 years. I am also quite familiar with the distribution of parthenogenesis and apomixis among animal taxa. Incidentally, when I said 'not a common event' I was referring specifically to the 'loss' of sexual reproduction within a phylogenetic lineage.
I would also agree that asexual lineages can *potentially* diverge more quickly than sexual ones.
But how does that relate to mechanisms of speciation for obligately sexual (amphimictic) populations that make up the majority of higher animals?
I looked at the four parts of your theory as explained on the website, and I immediately see at least one problem for applying it to higher animals. What about inbreeding depression and detrimental homozygosity among siblings? Most higher animlals have many behavioral mechanisms (dispersal etc.) that evolved specificall to reduce or prevent inbreeding. The only organisms truly adapted to inbreeding are those that routinely mate only with siblings, like gregarious hymenopterous parasitoids. Your model might work for them, but not for organisms adapted for outbreeding. The first few generations of your new species would have very low fitness compared to their progenitors, and yet presumably they would still be trying to occupy the same niche.