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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Characterizing the Saltol quantitative trait locus for salinity tolerance in rice
Rice, Volume 3, No. 2-3, Year 2010
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Description
This study characterized Pokkali-derived quantitative trait loci (QTLs) for seedling stage salinity tolerance in preparation for use in marker-assisted breeding. An analysis of 100 SSR markers on 140 IR29/Pokkali recombinant inbred lines (RILs) confirmed the location of the Saltol QTL on chromosome 1 and identified additional QTLs associated with tolerance. Analysis of a series of backcross lines and near-isogenic lines (NILs) developed to better characterize the effect of the Saltol locus revealed that Saltol mainly acted to control shoot Na +/K + homeostasis. Multiple QTLs were required to acquire a high level of tolerance. Unexpectedly, multiple Pokkali alleles at Saltol were detected within the RIL population and between backcross lines, and representative lines were compared with seven Pokkali accessions to better characterize this allelic variation. Thus, while the Saltol locus presents a complex scenario, it provides an opportunity for markerassisted backcrossing to improve salt tolerance of popular varieties followed by targeting multiple loci through QTL pyramiding for areas with higher salt stress. © Springer Science + Business Media, LLC 2010.
Authors & Co-Authors
Thomson, Michael J.
Philippines, Makati
International Rice Research Institute
de Ocampo, Marjorie P.
Philippines, Makati
International Rice Research Institute
Egdane, James A.
Philippines, Makati
International Rice Research Institute
Rahman, Mohammad Akhlasur
Philippines, Makati
International Rice Research Institute
Bangladesh, Gazipur
Bangladesh Rice Research Institute
Sajise, Andres Godwin C.
Philippines, Makati
International Rice Research Institute
Adorada, Dante L.
Philippines, Makati
International Rice Research Institute
Australia, Bathurst
Charles Sturt University
Tumimbang-Raiz, Ellen B.
United States, Davis
University of California, Davis
Blumwald, Eduardo
United States, Davis
University of California, Davis
Seraj, Zeba Islam
Bangladesh, Dhaka
University of Dhaka
Singh, Rakesh Kumar
Philippines, Makati
International Rice Research Institute
Tanzania
Irri
Gregorio, Glenn B.
Philippines, Makati
International Rice Research Institute
Ismail, Abdelbagi M.
Philippines, Makati
International Rice Research Institute
Statistics
Citations: 451
Authors: 12
Affiliations: 6
Identifiers
Doi:
10.1007/s12284-010-9053-8
ISSN:
19398425
e-ISSN:
19398433
Study Design
Cross Sectional Study
Study Approach
Quantitative