☭proletarian☭;1784373 said:
So from what I can see after digging through your source's long-winded and boring digressions, your proof of speciation - which is supposed to support the theory of evolution from one species to another by random mutation - is some guy deliberately cross-breeding flowers? And at that, he produced a sterile hybrid, so it wasn't really a species, since it couldn't replicate itself.
When are you ignoramuses going to learn that the intelligently-directed breeding activities of human beings cannot, by definition, prove random evolution? It embarrasses me to even have to utter that painfully, blindingly obvious sentence to someone.
lol
are you always this dishonest?
In the 1940's a fertile species was produced through chromosome
doubling (allopolyploidy) in a hybrid of two primrose species. The
new species was Primula kewensis. The story is recounted in:
Stebbins, G. L. 1950. Variation and Evolution in Plants.
Columbia University Press. New York
Two strains of Drosophila paulistorum developed hybrid sterility of male offspring between 1958 and 1963. Artificial selection induced strong intra-strain mating preferences.
(Test for speciation: sterile offspring and lack of interbreeding affinity.)
Dobzhansky, Th., and O. Pavlovsky, 1971. "An experimentally created incipient species of Drosophila", Nature 23:289-292.
http://www.evolutionslehrbuch.com/Kutschera+Niklas3.pdf
5.2.3 Speciation as a Result of Selection for Tolerance to a Toxin: Yellow Monkey Flower (Mimulus guttatus)
At reasonably low concentrations, copper is toxic to many plant species. Several plants have been seen to develop a tolerance to this metal (Macnair 1981). Macnair and Christie (1983) used this to examine the genetic basis of a postmating isolating mechanism in yellow monkey flower. When they crossed plants from the copper tolerant "Copperopolis" population with plants from the nontolerant "Cerig" population, they found that many of the hybrids were inviable. During early growth, just after the four leaf stage, the leaves of many of the hybrids turned yellow and became necrotic. Death followed this. This was seen only in hybrids between the two populations. Through mapping studies, the authors were able to show that the copper tolerance gene and the gene responsible for hybrid inviability were either the same gene or were very tightly linked. These results suggest that reproductive isolation may require changes in only a small number of genes.
Canine parovirus, a lethal disease of dogs, evolved from feline parovirus in the 1970s.
Muntzig, A, Triticale Results and Problems, Parey, Berlin, 1979. Describes whole new *genus* of plants, Triticosecale, of several species, formed by artificial selection.
N Barton Ecology: the rapid origin of reproductive isolation Science 290:462-463, Oct. 20, 2000.
Science/AAAS | Science Magazine: Sign In Natural selection of reproductive isolation observed in two cases. Full papers are: AP Hendry, JK Wenburg, P Bentzen, EC Volk, TP Quinn, Rapid evolution of reproductive isolation in the wild: evidence from introduced salmon. Science 290: 516-519, Oct. 20, 2000. and M Higgie, S Chenoweth, MWBlows, Natural selection and the reinforcement of mate recognition. Science290: 519-521, Oct. 20, 2000
ECOLOGY: African Elephant Species Splits in Two -- Vogel 293 (5534): 1414 -- Science
chluter, D. and L. M. Nagel. 1995. Parallel speciation by natural selection. American Naturalist. 146:292-301.
and someone was saying mutation is necessarily bad?
Biologists Discover Why 10 Percent Of Europeans Are Safe From HIV Infection
CCR5-delta32 mutation-protective against HIV, but bad for hepatitis C virus?