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Article

Genetic Dissection of Salt Tolerance and Yield Traits of Geng (japonica) Rice by Selective Subspecific Introgression

by
Simin Li
1,†,
Ting Feng
1,†,
Chenyang Zhang
1,
Fanlin Zhang
1,
Hua Li
1,
Yanjun Chen
1,
Lunping Liang
1,
Chaopu Zhang
1,
Wei Zeng
1,
Erbao Liu
1,
Yingyao Shi
1,
Min Li
1,* and
Lijun Meng
2,*
1
College of Agronomy, Anhui Agricultural University, Hefei 230036, China
2
Kunpeng Institute of Modern Agriculture at Foshan, Foshan 528200, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Curr. Issues Mol. Biol. 2023, 45(6), 4796-4813; https://doi.org/10.3390/cimb45060305
Submission received: 30 April 2023 / Revised: 13 May 2023 / Accepted: 22 May 2023 / Published: 31 May 2023
(This article belongs to the Special Issue Molecular Breeding and Genetics Research in Plants)
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Abstract

Salinity is a major factor limiting rice productivity, and developing salt-tolerant (ST) varieties is the most efficient approach. Seventy-eight ST introgression lines (ILs), including nine promising lines with improved ST and yield potential (YP), were developed from four BC2F4 populations from inter-subspecific crosses between an elite Geng (japonica) recipient and four Xian (indica) donors at the Institute of Crop Sciences, Chinese Academy of Agricultural Sciences. Genome-wide characterization of donor introgression identified 35 ST QTLs, 25 of which harbor 38 cloned ST genes as the most likely QTL candidates. Thirty-four are Xian-Geng differentiated ones with the donor (Xian) alleles associated with ST, suggesting differentiated responses to salt stress were one of the major phenotypic differences between the two subspecies. At least eight ST QTLs and many others affecting yield traits were identified under salt/non-stress conditions. Our results indicated that the Xian gene pool contains rich ‘hidden’ genetic variation for developing superior Geng varieties with improved ST and YP, which could be efficiently exploited by selective introgression. The developed ST ILs and their genetic information on the donor alleles for ST and yield traits would provide a useful platform for developing superior ST and high-yield Geng varieties through breeding by design in the future.
Keywords: salt tolerance; selection; correlated phenotypic responses; QTL clusters; rice salt tolerance; selection; correlated phenotypic responses; QTL clusters; rice

Share and Cite

MDPI and ACS Style

Li, S.; Feng, T.; Zhang, C.; Zhang, F.; Li, H.; Chen, Y.; Liang, L.; Zhang, C.; Zeng, W.; Liu, E.; et al. Genetic Dissection of Salt Tolerance and Yield Traits of Geng (japonica) Rice by Selective Subspecific Introgression. Curr. Issues Mol. Biol. 2023, 45, 4796-4813. https://doi.org/10.3390/cimb45060305

AMA Style

Li S, Feng T, Zhang C, Zhang F, Li H, Chen Y, Liang L, Zhang C, Zeng W, Liu E, et al. Genetic Dissection of Salt Tolerance and Yield Traits of Geng (japonica) Rice by Selective Subspecific Introgression. Current Issues in Molecular Biology. 2023; 45(6):4796-4813. https://doi.org/10.3390/cimb45060305

Chicago/Turabian Style

Li, Simin, Ting Feng, Chenyang Zhang, Fanlin Zhang, Hua Li, Yanjun Chen, Lunping Liang, Chaopu Zhang, Wei Zeng, Erbao Liu, and et al. 2023. "Genetic Dissection of Salt Tolerance and Yield Traits of Geng (japonica) Rice by Selective Subspecific Introgression" Current Issues in Molecular Biology 45, no. 6: 4796-4813. https://doi.org/10.3390/cimb45060305

APA Style

Li, S., Feng, T., Zhang, C., Zhang, F., Li, H., Chen, Y., Liang, L., Zhang, C., Zeng, W., Liu, E., Shi, Y., Li, M., & Meng, L. (2023). Genetic Dissection of Salt Tolerance and Yield Traits of Geng (japonica) Rice by Selective Subspecific Introgression. Current Issues in Molecular Biology, 45(6), 4796-4813. https://doi.org/10.3390/cimb45060305

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