Abstract
Soil salinity is becoming a worldwide issue that affects agricultural production. Understanding the mechanistic basis of salt tolerance is essential to improving crop production under saline conditions. This study dealt with identifying quantitative trait loci for salinity-tolerance related traits by association analysis using SSR markers. Two hundred twenty-seven wheat varieties were treated with artificial seawater, and several morphological indices for salinity tolerance in germination and seedling stages were calculated as criteria to assess salt tolerance. There was no correlation between salt tolerance at the germination and seedling stages, indicating different genetic mechanisms may exist for salt tolerance in different wheat growth stages. Twenty-four loci (p < 0.01) related to salinity tolerance were identified on 17 chromosomes. Among these loci, 18 loci were previously unreported. Comparing the frequencies containing different numbers of favorable alleles in landraces and modern cultivars, we found there is considerable genetic potential in landraces for salt tolerance in wheat breeding.
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Acknowledgements
This research was financially supported by National Key Research and Development Program of China (2016YFD0100102-3), National Natural Science Foundation of China (No. 31501313), Natural Science Foundation of Jiangsu (Grant No. BK20170596), and Jiangsu Agriculture Science and Technology Innovation Fund (JASTIF) (Grant no.cx [17] 3004) in China. Thanks to Thomas S. Cox, the Land Institute, USA, for his critical reading of the manuscript.
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Liu, Y., Liu, Y., Zhang, Q. et al. Genome-wide association analysis of quantitative trait loci for salinity-tolerance related morphological indices in bread wheat. Euphytica 214, 176 (2018). https://doi.org/10.1007/s10681-018-2265-5
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DOI: https://doi.org/10.1007/s10681-018-2265-5