A microbial population-species interface: nested cladistic and coalescent inference with multilocus data

被引:84
作者
Carbone, I [1 ]
Kohn, LM [1 ]
机构
[1] Univ Toronto, Dept Bot, Mississauga, ON L5L 1C6, Canada
关键词
fungi; migration; recombination; Sclerotinia; site compatibility; speciation;
D O I
10.1046/j.1365-294X.2001.01244.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Using sequence data from seven nuclear loci in 385 isolates of the haploid, plant parasitic, ascomycete fungus, Sclerotinia divergence times of populations and of species were distinguished. The evolutionary history of haplotypes on both population and species scales was reconstructed using a combination of parsimony, maximum likelihood and coalescent methods, implemented in a specific order. Analysis of site compatibility revealed recombination blocks from which alternative (marginal) networks were inferred, reducing uncertainty in the network due to recombination. Our own modifications of Templeton and co-workers' cladistic inference method and a coalescent approach detected the same phylogeographic processes. Assuming neutrality and a molecular clock, the boundary between divergent populations and species is an interval of time between coalescence (to a common ancestor) of populations and coalescence of species.
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页码:947 / 964
页数:18
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