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Book of Abstracts First Legume Society Conference 2013: A Legume Odyssey Novi Sad, Serbia, 9-11 May 2013
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Where does Portugal stand in a world of diverse common bean?
Marco Dinis 1 , Susana T Leitão 1 , Zlatko Šatović 2 , Maria Manuela Veloso 3 , Maria Carlota Vaz
Patto 1
1 Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
2 Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
3 Instituto Nacional de Investigação Agrícola e Veterinária, Oeiras, Portugal
Common bean (Phaseolus vulgaris L.), with a history of more than five centuries of cultivation, is a
popular and widely grown crop in Portugal due to its high organoleptic and nutritional value. To
evaluate genetic diversity, 65 representative Portuguese landraces were selected from the
common bean collection at INIAV germplasm bank (PRT005) and from a collecting mission to
the Portuguese central-northern regions low-input farms. In order to place the Portuguese
landraces in the context of the world bean diversity, 20 foreign wild and cultivated accessions (1
from Turkey, 1 from the USA and 17 from Central and South America from CIAT seed bank
and 1 from Angola) were included in this study. 85 accessions were screened with 23
microsatellite markers uniformly distributed throughout the common bean genome, including a
marker for phaseoline diversity analysis. Genetic distance values suggest high variability amongst
Portuguese bean, while low variance within landraces indicates a high degree of uniformity within
each landrace, reflecting their predominantly self-pollinated nature. While there seems to be no
evident connection between geographic and genetic distances amongst Portuguese beans, a clear
population structure, with 3 separated clusters, was identified, being most of the Portuguese
landraces placed closer to the Andean domesticated gene pool. Those clusters are in accordance
with the phaseoline patterns found among the bean landraces. With these results, we expect to
deepen the understanding of the existing diversity in the common bean Portuguese germplasm,
and pave the way for future improvement efforts based on this valuable and unexplored resource.
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