New species of Arachis from the Bolivian Chiquitanía.

A. KRAPOVICKAS; ATAHUACHI, M.; J. G. SEIJO

Brasilia

Congreso; 5th International Conference of the Peanut Research Community on Advances in Arachis through Genomics and Biotechnology (AAGB).; 2011

  New species of Arachis from the bolivian Chiquitanía.   Krapovickas1*, A., M. Atahuachi3 y G. Seijo1,2 1Instituto de Botánica del Nordeste, 2FACENA Universidad Nacional del Nordeste, C.C. 209, 3400 Corrientes, Argentina, 3Herbario Martín Cardenas, Cochabamba, Bolivia.   Chiquitanía is the eastern region of Bolivia in which a large ecozone is formed by the confluence of three different hydrographic basins and three very diverse phytogeographic regions. Field exploration until 2000 were mainly done using local flights to join distant points because of the many difficulties found for terrestrial displacement during the rainy season. Between the years 2002 and 2010 new expeditions were done thanks to a collaboration established between bolivians and argentinians to explore the area. The first objective of this collaboration was to intensify the collection of wild Arachis species in the search of materials that will help to reconstruct the evolutionary history of the Section in the region and to increase the allelic diversity available in the A and B genomes for potential introgressions to the cultivated peanut, A. hypogaea (AABB). So far, seven new species have been recognized and two new records were found for Bolivia. Among the new species, three belong to the A genome (perennials), two to the B genome (annuals) and one probably of K genome (annual). The new records for Bolivia are A. hoenei y a A. glabrata. The latter evidences the presence of section Rhizomatosae also in Bolivia. The botanical collections carried out in Bolivia in the last decade have identified the east of this country as one of the richest regions in Arachis species and demonstrated the immediate need to intensify field explorations in the search of new wild Arachis.   Seijo@agr.unne.edu.ar