Chromosomal speciation and molecular divergence--accelerated evolution in rearranged chromosomes - PubMed (original) (raw)

. 2003 Apr 11;300(5617):321-4.

doi: 10.1126/science.1080600.

Affiliations

• PMID: 12690198
• DOI: 10.1126/science.1080600

Chromosomal speciation and molecular divergence--accelerated evolution in rearranged chromosomes

Arcadi Navarro et al. Science. 2003.

Abstract

Humans and their closest evolutionary relatives, the chimpanzees, differ in approximately 1.24% of their genomic DNA sequences. The fraction of these changes accumulated during the speciation processes that have separated the two lineages may be of special relevance in understanding the basis of their differences. We analyzed human and chimpanzee sequence data to search for the patterns of divergence and polymorphism predicted by a theoretical model of speciation. According to the model, positively selected changes should accumulate in chromosomes that present fixed structural differences, such as inversions, between the two species. Protein evolution was more than 2.2 times faster in chromosomes that had undergone structural rearrangements compared with colinear chromosomes. Also, nucleotide variability is slightly lower in rearranged chromosomes. These patterns of divergence and polymorphism may be, at least in part, the molecular footprint of speciation events in the human and chimpanzee lineages.

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Comment in

• Evolution. Chromosomal speciation in primates.
  Rieseberg LH, Livingstone K. Rieseberg LH, et al. Science. 2003 Apr 11;300(5617):267-8. doi: 10.1126/science.1084192. Science. 2003. PMID: 12690181 No abstract available.
• Chromosomal speciation.
  Bowers EJ. Bowers EJ. Science. 2003 Aug 8;301(5634):764-5; author reply 764-5. doi: 10.1126/science.301.5634.764. Science. 2003. PMID: 12907779 No abstract available.
• Comment on "Chromosomal speciation and molecular divergence-accelerated evolution in rearranged chromosomes".
  Lu J, Li WH, Wu CI. Lu J, et al. Science. 2003 Nov 7;302(5647):988; author reply 988. doi: 10.1126/science.302.5647.988a. Science. 2003. PMID: 14605352 No abstract available.

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