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DNA markers reveal genetic structure and localized diversity of Ethiopian sorghum landraces

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Title DNA markers reveal genetic structure and localized diversity of Ethiopian sorghum landraces
 
Creator Desmae, Haile
 
Contributor Jordan, David
Godwin, Ian
 
Subject differentiation
simple sequence repeats (ssr)
sorghum.
diversity
Sorghum
 
Description North Eastern Ethiopia is a major sorghum-growing region. A total of 415 sorghum landraces were
sampled to represent the range of agro-ecologies (three altitude ranges) as well as spatial
heterogeneity, that is, 4 zones: North Welo, South Welo, Oromiya and North Shewa with each zone
containing 2 to 5 districts. The landraces were genotyped with simple sequence repeats (SSR) and inter
simple sequence repeats (ISSR) markers. High genetic diversity was observed among the landraces for
both marker systems. STRUCTURE analysis revealed 4 clusters of genetically differentiated groups of
landraces. Cluster analysis revealed a close relationship between landraces along geographic proximity
with genetic distance between landraces increasing with an increase in geographic distance. The
grouping of landraces based on districts was influenced by clinal trend and geographic proximity. The
FST statistics showed significant geographic differentiation among landraces at various levels of
predefined geographic origin but a large portion of the variation was among landraces within rather
than between predefined populations. The landraces from North Shewa were predominantly in one
cluster, and landraces from this area also exhibited the greatest allelic diversity and the highest number
of private alleles. There was low variation among the highland Zengada landraces, but these landraces
were quite strongly differentiated and fell into one population cluster. The low to moderate genetic
differentiation between landraces from various geographic origins could be attributed to gene flow
across the region as a consequence of seed exchange among farmers.
 
Date 2016-10-12
2017-03-15T04:09:29Z
2017-03-15T04:09:29Z
 
Type Journal Article
 
Identifier http://oar.icrisat.org/id/eprint/9743
https://mel.cgiar.org/reporting/download/hash/rAQooMSo
Haile Desmae, David Jordan, Ian Godwin. (12/10/2016). DNA markers reveal genetic structure and localized diversity of Ethiopian sorghum landraces. African Journal of Biotechnology, 15 (41), pp. 2301-2311.
https://hdl.handle.net/20.500.11766/6489
Open access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Academic Journals
 
Source African Journal of Biotechnology;15,(2016) Pagination 2301,2311