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果蝇(3)--黑腹果蝇Drosophila melanogaster Sympatric speciation 之二
看看做试验的科学家论文是怎样写的Rice, W. R. and G. W. Salt. 1988. Speciation via disruptive selection on habitat preference: experimental evidence
试验的大意是,将相同来源的黑腹果蝇按照Habitat preferenses进行分类,一段时间后再将这些果蝇混合,发现habitat specialization(相同98%-99%habitat preference的果蝇找同类的交配)形成,论文作者自己的结论:
“It might be argued that incipient speciation has not occurred in this experiment for two reasons. First, trace amounts of gene flow occurred between the population using habitats SE and 4L, since a small fraction of flies switched habitats between generations. Because small amounts of introgression are frequently observed in natural sibling species without species status being invalidated, this objection is unwarranted. "
--阿Q:论文实验结果表明,经过30代繁殖,98%或者99%的果蝇选择相同生活习性的果蝇交配,还有1-2%选择不同习性的果蝇。阿Q认为如何定义Species完全是科学家的选择,是否将这些不同Habitat的果蝇分到不同的物种,完全是一个Paper work的问题,不重要
"Second, forced matings between the two populations produced fertile offspring in the F1 and F2, and thus reproductive isolation was mediated only by habitat-preference behaviour. Even though behaviourally isolated species can be forced to interbreed successfully under unnatural conditions. Their species status is not invalid, as pointed out ny Mayr. ”
--阿Q:这段话,相当于作者承认这些果蝇的Speciation,是Pre-mating productive isolation,它们之间是可以交配,并且后代也可以繁殖的。
正因为阿Q已经注意到的,Species物种的分类,并没有完全以生殖隔离为标准的。科学家是否将这些果蝇当成新物种的形成是paper work的事情,如果将这个试验作为共同起源的证据,是无效的,因为:
看看做试验的科学家论文是怎样写的Rice, W. R. and G. W. Salt. 1988. Speciation via disruptive selection on habitat preference: experimental evidence
试验的大意是,将相同来源的黑腹果蝇按照Habitat preferenses进行分类,一段时间后再将这些果蝇混合,发现habitat specialization(相同98%-99%habitat preference的果蝇找同类的交配)形成,论文作者自己的结论:
“It might be argued that incipient speciation has not occurred in this experiment for two reasons. First, trace amounts of gene flow occurred between the population using habitats SE and 4L, since a small fraction of flies switched habitats between generations. Because small amounts of introgression are frequently observed in natural sibling species without species status being invalidated, this objection is unwarranted. "
--阿Q:论文实验结果表明,经过30代繁殖,98%或者99%的果蝇选择相同生活习性的果蝇交配,还有1-2%选择不同习性的果蝇。阿Q认为如何定义Species完全是科学家的选择,是否将这些不同Habitat的果蝇分到不同的物种,完全是一个Paper work的问题,不重要
"Second, forced matings between the two populations produced fertile offspring in the F1 and F2, and thus reproductive isolation was mediated only by habitat-preference behaviour. Even though behaviourally isolated species can be forced to interbreed successfully under unnatural conditions. Their species status is not invalid, as pointed out ny Mayr. ”
--阿Q:这段话,相当于作者承认这些果蝇的Speciation,是Pre-mating productive isolation,它们之间是可以交配,并且后代也可以繁殖的。
正因为阿Q已经注意到的,Species物种的分类,并没有完全以生殖隔离为标准的。科学家是否将这些果蝇当成新物种的形成是paper work的事情,如果将这个试验作为共同起源的证据,是无效的,因为:
- DNA意义上的生殖隔离并没有形成
- 论文确实没有分析DNA,没有提到是否有新的DNA信息的形成。阿Q不喜欢假设,但是从论文看,看不到没有产生新DNA信息的可能