Abstract
Rice (Oryza sativa L.) is seriously impacted by global soil salinization. To determine the quantitative trait loci (QTLs) related to salt tolerance in rice roots, F2:3 and BC1F2:3 populations derived from a cross between the cv. Dongnong 425 of high quality and yield and the salt-tolerant cv. Changbai 10, were studied at different development stages. Two genetic linkage maps of F2:3 and BC1F2:3 populations were constructed. A 66 mM NaCl solution was used to irrigate the field and to analyze the dynamic QTL of some rice root traits. Using unconditional and conditional QTL mapping methods, 30 unconditional QTLs and 16 conditional QTLs related to the 6 root traits were detected on the 9 rice chromosomes during different developmental stages. Fourteen pairs of unconditional and conditional QTLs were detected at the identical developmental stage in the identical population. A number of QTLs were detected at different developmental stages, however, many did not appear at the last stage. Remarkably, qRKC1 appeared continuously at multiple stages in both the populations suggesting its key role in regulating the salt tolerance of rice roots.
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Abbreviations
- CTAB:
-
cetyltrimethylammonium bromide
- QTLs:
-
quantitative trait loci
References
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Acknowledgements: This work was supported by the National Science and Technology support programs (2013BAD20B04 and 2011BAD35B02-01)
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Sun, J., Zou, D.T., Luan, F.S. et al. Dynamic QTL analysis of the Na+ content, K+ content, and Na+/K+ ratio in rice roots during the field growth under salt stress. Biol Plant 58, 689–696 (2014). https://doi.org/10.1007/s10535-014-0445-2
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DOI: https://doi.org/10.1007/s10535-014-0445-2