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Molecular variation along an altitude gradient in Ethiopian barley landraces

Tanto Hadado, Tesema and Rau, Domenico and Bitocchi, Elena and Papa, Roberto (2009) Molecular variation along an altitude gradient in Ethiopian barley landraces. In: Proceedings of the 53rd Italian Society of Agricultural Genetics Annual Congress, 16/19 September, 2009, Torino, Italy. [S.l.], [S.n.]. eISBN 978-88-900622-9-2. Conference or Workshop Item.

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To determine the level and pattern of genetic variation in barley (Hordem vulgare L.) landraces from North Shewa zone, in the central highlands of Ethiopia, the genetic variability at seven nuclear microsatellite loci was examined. Analysis was carried out on a total of 106 landrace populations sampled in two growing seasons (Meher and Belg, the long and short rainy season, respectively), across three districts (Ankober, Mojanawadera and Tarmaber), and, within each district, all along an altitudinal gradient (from 1798 to 3324 m a.s.l).
Genetic variation has been ascribed to differences between altitudinal classes (FST = 0.10) more than between seasons or among districts (FST = 0.02). The most relevant outcome of the experiment is that altitude level largely overrides geographical distance as main cause of divergence among individual plants. Moreover, results also suggest that the patterns of clinal variation among districts and seasons are inconsistent with a simple model drift and dispersal (seed exchange). They suggested instead a role for historical patterns of colonization, or, alternatively, present-day selective forces acting on some of the SSR analysed.

Item Type:Conference or Workshop Item (Poster)
ID Code:4172
Uncontrolled Keywords:Hordeum vulgare, landraces, cline of variation, selection, autocorrelation
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/07 Genetica agraria
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze agronomiche e genetica vegetale agraria
Deposited On:14 Jul 2010 10:19

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