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| Mapping and confrmation of loci for salt tolerance in a novel soybean germplasm, Fiskeby III |
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Breeding soybean for tolerance to high salt conditions is important in some regions of the USA and world. Soybean cultivar Fiskeby III (PI 438471) in maturity group 000 has been reported to be highly tolerant to multiple abiotic stress condi-tions, including salinity. In this study, a mapping population of 132 F2 families derived from a cross of cultivar Williams 82 (PI 518671, moderately salt sensitive) and Fiskeby III (salt tolerant) was analyzed to map salt tolerance genes. |
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Tuyen D. Do, Tri D. Vuong, David Dunn, Scotty Smothers, Gunvant Patil, Dennis C. Yungbluth,, Pengyin Chen, Andrew Scaboo, Dong Xu, Thomas E. Carter, Henry T. Nguyen, J. Grover Shannon Theoretical and Applied Genetics, 18 November 2017; https://doi.org/10.1007/s00122-017-3015-0 AbstractKey messageThe confrmation of a major locus associated with salt tolerance and mapping of a new locus, which could be benefcial for improving salt tolerance in soybean. AbstractBreeding soybean for tolerance to high salt conditions is important in some regions of the USA and world. Soybean cultivar Fiskeby III (PI 438471) in maturity group 000 has been reported to be highly tolerant to multiple abiotic stress condi-tions, including salinity. In this study, a mapping population of 132 F2 families derived from a cross of cultivar Williams 82 (PI 518671, moderately salt sensitive) and Fiskeby III (salt tolerant) was analyzed to map salt tolerance genes. The evaluation for salt tolerance was performed by analyzing leaf scorch score (LSS), chlorophyll content ratio (CCR), leaf sodium content (LSC), and leaf chloride content (LCC) after treatment with 120 mM NaCl under greenhouse conditions. Genotypic data for the F2 population were obtained using the SoySNP6K Illumina Infnium BeadChip assay. A major allele from Fiskeby III was signifcantly associated with LSS, CCR, LSC, and LCC on chromosome (Chr.) 03 with LOD scores of 19.1, 11.0, 7.7 and 25.6, respectively. In addition, a second locus associated with salt tolerance for LSC was detected and mapped on Chr. 13 with an LOD score of 4.6 and an R2 of 0.115. Three gene-based polymorphic molecular markers (Salt-20, Salt14056 and Salt11655) on Chr.03 showed a strong predictive association with phenotypic salt tolerance in the present mapping popula-tion. These molecular markers will be useful for marker-assisted selection to improve salt tolerance in soybean.
See: https://doi.org/10.1007/s00122-017-3015-0
Figure 3: A logarithm of the odds (LOD) plot showing the location of locus for leaf sodium content (LSC) on Chr. 03 (a) and a putative locus for leaf sodium content (LSC) on Chr. 13 (b) in F2:3 families derived from a cross between Williams 82 and Fiskeby III |
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(23).png "Mapping and confrmation of loci for salt tolerance in a novel soybean germplasm, Fiskeby III")
