eprintid: 93
rev_number: 22
eprint_status: archive
userid: 6
dir: disk0/00/00/00/93
datestamp: 2011-07-07 05:04:59
lastmod: 2011-07-07 05:04:59
status_changed: 2011-07-07 05:04:59
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@CGIAR.ORG
item_issues_count: 0
creators_name: Caniato, F F
creators_name: Guimarães, C T
creators_name: Hamblin, M
creators_name: Billot, C
creators_name: Rami, Jean-François
creators_name: Hufnagel, B
creators_name: Kochian, L V
creators_name: Liu, J
creators_name: Garcia, A A F
creators_name: Hash, C T
creators_name: Ramu, P
creators_name: Mitchell, S
creators_name: Kresovich, S
creators_name: Oliveira, A C
creators_name: Avellar, Gisela de
creators_name: Borém, A
creators_name: Glaszmann, Jean-Christophe
creators_name: Schaffert, R E
creators_name: Magalhaes, J V
icrisatcreators_name: Hash, C T
icrisatcreators_name: Ramu, P
affiliation: Embrapa Maize and Sorghum(Minas Gerais)
affiliation: Institute for Genomic Diversity(New York)
affiliation: CIRAD(Montpeillar)
affiliation: Universidade Federal de Minas Gerais(Belo Horizonte)
affiliation: Robert W. Holley Center for Agriculture(New York)
affiliation: Escola Superior de Agricultura Luiz de Queiroz(Piracicaba)
affiliation: ICRISAT(Patancheru)
affiliation: Universidade Federal de Vicosa(Minas Gerais)
country: Brazil
country: USA
country: France
country: India
title: The relationship between population structure and aluminum tolerance in cultivated sorghum
ispublished: pub
subjects: s1.4
full_text_status: restricted
agrotags: <b>Agrotags</b>     - tolerance | sorghum | genetics | vegetative propagation | genes | animal population | growth | planting | social groups | soil <br><b>Fishtags</b>    - NOT-AVAILABLE<br><b>Geopoliticaltags</b> - africa | guinea | asia | southern africa | chad | west africa | principe | lake chad | new york | brazil
abstract: Background: Acid soils comprise up to 50% of the world’s arable lands and in these areas aluminum (Al) toxicity impairs
root growth, strongly limiting crop yield. Food security is thereby compromised in many developing countries located in
tropical and subtropical regions worldwide. In sorghum, SbMATE, an Al-activated citrate transporter, underlies the AltSB locus
on chromosome 3 and confers Al tolerance via Al-activated root citrate release.
Methodology: Population structure was studied in 254 sorghum accessions representative of the diversity present in
cultivated sorghums. Al tolerance was assessed as the degree of root growth inhibition in nutrient solution containing Al. A
genetic analysis based on markers flanking AltSB and SbMATE expression was undertaken to assess a possible role for AltSB in
Al tolerant accessions. In addition, the mode of gene action was estimated concerning the Al tolerance trait. Comparisons
between models that include population structure were applied to assess the importance of each subpopulation to Al
tolerance.
Conclusion/Significance: Six subpopulations were revealed featuring specific racial and geographic origins. Al tolerance
was found to be rather rare and present primarily in guinea and to lesser extent in caudatum subpopulations. AltSB was
found to play a role in Al tolerance in most of the Al tolerant accessions. A striking variation was observed in the mode of
gene action for the Al tolerance trait, which ranged from almost complete recessivity to near complete dominance, with a
higher frequency of partially recessive sources of Al tolerance. A possible interpretation of our results concerning the origin
and evolution of Al tolerance in cultivated sorghum is discussed. This study demonstrates the importance of deeply
exploring the crop diversity reservoir both for a comprehensive view of the dynamics underlying the distribution and
function of Al tolerance genes and to design efficient molecular breeding strategies aimed at enhancing Al tolerance.
date: 2011
date_type: published
publication: PLoS ONE
volume: 6
number: 6
publisher: Public Library of Science 
pagerange: 14pp
refereed: TRUE
official_url: http://dx.doi.org/10.1371/journal.pone.0020830
funders: Generation Challenge Programme
funders: McKnight Foundation Collaborative Crop Research Program
funders: Fundacao de Amparoa Pesquisa do Estado de Minas Gerais
funders: The National Council for Scientific and Technological Development
citation:   Caniato, F F and Guimarães, C T and Hamblin, M and Billot, C and Rami, Jean-François and Hufnagel, B and Kochian, L V and Liu, J and Garcia, A A F and Hash, C T and Ramu, P and Mitchell, S and Kresovich, S and Oliveira, A C and Avellar, Gisela de and Borém, A and Glaszmann, Jean-Christophe and Schaffert, R E and Magalhaes, J V  (2011) The relationship between population structure and aluminum tolerance in cultivated sorghum.  PLoS ONE, 6 (6).  14pp.      
document_url: http://oar.icrisat.org/93/1/PLoS__ONE_6_6_e20830_2011.pdf