@article{fdi:010062617,
  title = {{A}llopolyploidy, diversification, and the {M}iocene grassland expansion},
  author = {{E}step, {M}. {C}. and {M}c{K}ain, {M}. {R}. and {D}iaz, {D}. {V}. and {Z}hong, {J}. {S}. and {H}odge, {J}. {G}. and {H}odkinson, {T}. {R}. and {L}ayton, {D}. {J}. and {M}alcomber, {S}. {T}. and {P}asquet, {R}{\'e}my and {K}ellogg, {E}. {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he role of polyploidy, particularly allopolyploidy, in plant diversification is a subject of debate. {W}hole-genome duplications precede the origins of many major clades (e. g., angiosperms, {B}rassicaceae, {P}oaceae), suggesting that polyploidy drives diversification. {H}owever, theoretical arguments and empirical studies suggest that polyploid lineages may actually have lower speciation rates and higher extinction rates than diploid lineages. {W}e focus here on the grass tribe {A}ndropogoneae, an economically and ecologically important group of {C}-4 species with a high frequency of polyploids. {A} phylogeny was constructed for ca. 10% of the species of the clade, based on sequences of four concatenated low-copy nuclear loci. {G}enetic allopolyploidy was documented using the characteristic pattern of double-labeled gene trees. {A}t least 32% of the species sampled are the result of genetic allopolyploidy and result from 28 distinct tetraploidy events plus an additional six hexaploidy events. {T}his number is a minimum, and the actual frequency could be considerably higher. {T}he parental genomes of most {A}ndropogoneae polyploids diverged in the {L}ate {M}iocene coincident with the expansion of the major {C}-4 grasslands that dominate the earth today. {T}he well-documented whole-genome duplication in {Z}ea mays ssp. mays occurred after the divergence of {Z}ea and {S}orghum. {W}e find no evidence that polyploidization is followed by an increase in net diversification rate; nonetheless, allopolyploidy itself is a major mode of speciation.},
  keywords = {},
  booktitle = {},
  journal = {{P}roceedings of the {N}ational {A}cademy of {S}ciences of the {U}nited {S}tates of {A}merica},
  volume = {111},
  numero = {42},
  pages = {15149--15154},
  ISSN = {0027-8424},
  year = {2014},
  DOI = {10.1073/pnas.1404177111},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062617},
}