• Publications
  • Influence
Tempo and mode in evolution.
  • W. Fitch, F. Ayala
  • Biology
    Proceedings of the National Academy of Sciences…
  • 19 July 1994
TLDR
In the introduction to his book, Simpson averred that an essential part of his study was an "attempted synthesis of paleontology and genetics," an effort that pervaded the whole book, but was particularly the subject of the first two chapters, which accounted for nearly half the book's pages.
Molecular systematics
  • F. Ayala
  • Journal of Molecular Evolution
  • 2004
Nucleotide sequences provide evidence of genetic exchange among distantly related lineages of Trypanosoma cruzi
TLDR
Well-supported gene genealogies show that mitochondrial and nuclear gene sequences from T. cruzi cluster, respectively, in three or four distinct clades that do not fully correspond to the two previously defined major lineages of T.cruzi.
Evidence for positive selection in the superoxide dismutase (Sod) region of Drosophila melanogaster.
TLDR
The large group of nearly identical haplotypes suggests that a recent mutation, at the Sod locus or tightly linked to it, has increased rapidly in frequency to around 50%, both in California and Spain.
GENETIC DIFFERENTIATION DURING THE SPECIATION PROCESS IN DROSOPHILA
TLDR
The question, "how much genetic differentiation occurs in the process of speciation," must be unfolded into two separate questions concerning the two stages of the process, and the genetic differentiation occurring between allopatric populations that are likely to give rise to different species if and when they become, at least partially, sympatric.
Global models of growth and competition.
  • M. Gilpin, F. Ayala
  • Biology
    Proceedings of the National Academy of Sciences…
  • 1 December 1973
TLDR
This model represents an extension of the Lotka-Volterra model of competition; it adds a fourth parameter that controls the degree of nonlinearity in intraspecific growth regulation and represents a similar Extension of the logistic model of population growth.
Adaptations of Trypanosoma brucei to gradual loss of kinetoplast DNA: Trypanosoma equiperdum and Trypanosoma evansi are petite mutants of T. brucei
TLDR
It is shown that both species are actually strains of T. brucei equiperdum and T. evansi, which lost part (Dk) or all (Ak) of their kDNA, and these trypanosomes are not monophyletic clades and do not qualify for species status.
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