Journal article
Ecotypic differentiation under farmers' selection: Molecular insights into the domestication of Pachyrhizus Rich. ex DC. (Fabaceae) in the Peruvian Andes
Evolutionary applications, v 10(5), pp 498-513
Jun 2017
PMID: 28515782
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Understanding the distribution of crop genetic diversity in relation to environmental factors can give insights into the eco‐evolutionary processes involved in plant domestication. Yam beans (
Pachyrhizus
Rich. ex
DC
.) are leguminous crops native to South and Central America that are grown for their tuberous roots but are seed‐propagated. Using a landscape genetic approach, we examined correlations between environmental factors and phylogeographic patterns of genetic diversity in
Pachyrhizus
landrace populations. Molecular analyses based on chloroplast
DNA
sequencing and a new set of nuclear microsatellite markers revealed two distinct lineages, with strong genetic differentiation between Andean landraces (lineage A) and Amazonian landraces (lineage B). The comparison of different evolutionary scenarios for the diversification history of yam beans in the Andes using approximate Bayesian computation suggests that
Pachyrhizus ahipa
and
Pachyrhizus tuberosus
share a progenitor‐derivative relationship, with environmental factors playing an important role in driving selection for divergent ecotypes. The new molecular data call for a revision of the taxonomy of
Pachyrhizus
but are congruent with paleoclimatic and archeological evidence, and suggest that selection for determinate growth was part of ecophysiological adaptations associated with the diversification of the
P. tuberosus
–
P. ahipa
complex during the Mid‐Holocene.
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Details
- Title
- Ecotypic differentiation under farmers' selection: Molecular insights into the domestication of Pachyrhizus Rich. ex DC. (Fabaceae) in the Peruvian Andes
- Creators
- Marc Delêtre - Muséum national d'Histoire naturelleBeatriz Soengas - Muséum national d'Histoire naturellePrem Jai Vidaurre - Higher University of San AndrésRosa Isela Meneses - Higher University of San AndrésIsabel Oré Balbín - Instituto de Investigaciones de la Amazonía PeruanaMonica Santayana - International Potato CenterBettina Heider - International Potato CenterMarten Sørensen - University of CopenhagenOctavio Borges-Delgado - Global Studies and Modern Languages
- Publication Details
- Evolutionary applications, v 10(5), pp 498-513
- Publisher
- John Wiley and Sons Inc
- Grant note
- D43/JK / Belgian Development Cooperation
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Global Studies and Modern Languages
- Web of Science ID
- WOS:000401183300007
- Scopus ID
- 2-s2.0-85016446267
- Other Identifier
- 991021861871704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Evolutionary Biology