Genetic resources of wild Arachis and genetic diversity
1994
Walls, J.F.M. | Maass, B.L. | Lopes, C.R.
Genetic resources conserved of wild Arachis species doubled in the past decade. The species most represented in the world collection is A. glabrata, followed by A. pintoi. The largest collections are held at the Centro Nacional de Pesquisa de Recursos Geneticos e Biotecnologia/Empresa Brasileira de Pesquisa Agropecuaria (CENARGEN/EMBRAPA), Brazil, and the Texas Agricultural Experiment Station of Texas A and M University, USA. Although the number of available accessions increased significantly, germplasm flow of new material is relatively slow. The main reasons for this are little or no seed production and slow quarantine procedures. The few studies of genetic diversity emphasizing wild species with forage potential, such as A. glabrata, A. pintoi, and A. sylvestris, showed a high degree of intraspecific variation. Methods that provide satisfactory results include morphological descriptors, isozyme patterns obtained by electrophoresis, and molecular markers.
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