Genetic diversity of peanut (Arachis hypogaea L.) and its wild relatives based on the analysis of hypervariable regions of the genome |
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Authors: | Marcio Carvalho de Moretzsohn Mark S Hopkins Sharon E Mitchell Stephen Kresovich Jose Francisco Montenegro Valls and Marcio Elias Ferreira |
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Institution: | (1) Embrapa Recursos Gen?ticos e Biotecnologia, C.P.02372, 70.770-900 Bras?lia-DF, Brazil;(2) USDA-ARS, Plant Genetic Resources Conservation Unit, 1109 Experiment Street, Griffin, GA, 30223, U.S.A;(3) Institute for Genomic Diversity, Cornell Univ, Ithaca, NY 14853, USA;(4) Catholic University of Bras?lia, CAMPUS II – SGAN Quadra 916, M?dulo B, Av. W5, Norte – Bras?lia, DF, CEP: 70790-160, Brazil |
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Abstract: | Background The genus Arachis is native to a region that includes Central Brazil and neighboring countries. Little is known about the genetic variability
of the Brazilian cultivated peanut (Arachis hypogaea, genome AABB) germplasm collection at the DNA level. The understanding of the genetic diversity of cultivated and wild species
of peanut (Arachis spp.) is essential to develop strategies of collection, conservation and use of the germplasm in variety development. The
identity of the ancestor progenitor species of cultivated peanut has also been of great interest. Several species have been
suggested as putative AA and BB genome donors to allotetraploid A. hypogaea. Microsatellite or SSR (Simple Sequence Repeat) markers are co-dominant, multiallelic, and highly polymorphic genetic markers,
appropriate for genetic diversity studies. Microsatellite markers may also, to some extent, support phylogenetic inferences.
Here we report the use of a set of microsatellite markers, including newly developed ones, for phylogenetic inferences and
the analysis of genetic variation of accessions of A. hypogea and its wild relatives. |
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