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방사선 유도 내염성 증진 사료용 옥수수 돌연변이체 특성 분석

조철오1, 김경화1, 최만수1, 전재범1, 서미숙1, 정남희1, 진민아1, 손범영2, 김둘이1

Characterization of a Gamma Radiation-Induced Salt-Tolerant Silage Maize Mutant

Korean Journal of Breeding Science 2019;51(4):318-325.
Published online: December 1, 2019

1농촌진흥청 국립식량과학원 작물기초기반과

2중부작물과

1Crop Foundation Research Division, National Institute of Crop Science, RDA, Wanju 55365, Republic of Korea

2Department of Central Area Crop Science, National Institute of Crop Science, RDA, Suwon, 1649, Republic of Korea

* Corresponding Author (E-mail: dykim22@korea.kr, Tel: +82-63-238-5323, Fax: +82-63-238-5305)
• Received: July 16, 2019   • Revised: September 16, 2019   • Accepted: September 16, 2019

Copyright © 2019 by the Korean Society of Breeding Science

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Characterization of a Gamma Radiation-Induced Salt-Tolerant Silage Maize Mutant
Korean. J. Breed. Sci.. 2019;51(4):318-325.   Published online December 1, 2019
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Korean. J. Breed. Sci.. 2019;51(4):318-325.   Published online December 1, 2019
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Characterization of a Gamma Radiation-Induced Salt-Tolerant Silage Maize Mutant
Image Image Image Image
Fig. 1 Schematic representation of procedures for the selection of gamma radiation-induced salt-tolerant lines. Total 3,000 of M0 seeds were irradiated with 100 Gy gamma rays for 4 hours at room temperature. For selection of salt-tolerant lines, M3 plants were grown for 3 weeks on soil containing 0.7% NaCl in the greenhouse.
Fig. 2 Phenotype analysis of KS140 and 140RS516 after salt stress. (A) Morphological phenotype of KS140 and 140RS516 in response to various concentration of NaCl. Germination rate (B) and stem length (C) of KS140 and 140RS516 in response to NaCl. Plants were grown for 10 days on medium containing each concentration of NaCl. Data are means ±SD determined from three independent biological replicates. Asterisks denote statistical significance at p<0.05 (*) by Student’s t-test.
Fig. 3 Effect of salt stress on morphological phenotype, stomatal conductance, and proline contents of KS140 and 140RS516. (A) Phenotypes were analyzed after 0.5% NaCl treatment. Plants were grown for 2 months on soil then treated 0.5% NaCl for 7 days and recovered for 2 days. Magnified images of the regions boxed in (A) are shown in a, b, c and d. Stomatal conductance (B) and proline contents (C) of KS140 and 140RS516. Data are means ±SD determined from three independent biological replicates. Asterisks denote statistical significance at p<0.05 (*) and p<0.01 (**) by Student’s t-test. Scale Bars: 10 cm.
Fig. 4 qRT-PCR analysis of salt stress responsive genes in KS140 and 140RS516. For salt stress treatment, each seeds were sown in medium with or without 0.5% NaCl. Plants were grown for 10 days with or without 0.5% NaCl. Data are means ±SE determined from three independent biological replicates. Different letters indicate a significant difference determined by one-way ANOVA followed by Duncan’s post hoc test (p<0.05). ABP, ABA-responsive-elementbinding protein 9; CIPK21, CBL-interacting protein kinase 21; CIPK31, CBL-interacting protein kinase 31.
Characterization of a Gamma Radiation-Induced Salt-Tolerant Silage Maize Mutant

Summary of genetic variations in 140RS516 mutant line.

Variant category Number of variants
5'-UTRz 3
Coding (Exonic) 4
Intronic 18
3'-UTR 1
Intergenic 302
Total 328
Nonsynonymous 3
Synonymous 1
Total Coding 4

List of genetic variations on genic region of 140RS516 mutant line.

zChr. ReferenceAllele MutationAllele AnnotationType Gene ID Gene Description
1 TTTACTC T Intron Zm00001d027392 Callose synthase 9
1 G C Nonsynonymous Zm00001d028207 ATP synthase subunit gamma mitochondrial
1 T C Intron Zm00001d033237 Uncharacterised conserved protein
1 G T Nonsynonymous Zm00001d033304 Nucleotide binding protein
1 T G Intron Zm00001d034931 COP1-interacting protein-related
2 A G Intron Zm00001d003284 SWI/SNF complex subunit SWI3A
2 T C 5'-UTR Zm00001d005100 RNA binding (RRM/RBD/RNP motifs) family protein
2 A G 5'-UTR Zm00001d007444 Unknown
3 G C Synonymous Zm00001d039282 Serine/threonine-protein kinase AGC1-5
3 A T Nonsynonymous Zm00001d039282 Serine/threonine-protein kinase AGC1-5
3 C T Intron Zm00001d040104 Unknown
3 A G Intron Zm00001d042303 Beclin 1 protein 253B Beclin-1-like protein
4 C G Intron Zm00001d053561 Pentatricopeptide repeat-containing protein mitochondrial
5 C T Intron Zm00001d013070 Transcription factor MYB98
5 C T 3'-UTR Zm00001d013073 Transcription factor bHLH7
6 A G Intron Zm00001d038365 Aldo-keto reductase family 4 member C9
6 T G Intron Zm00001d038650 Xylem bark cysteine peptidase 3
7 T TAC Intron Zm00001d018829 Protein YABBY
7 A T Intron Zm00001d019627 ABC transporter B family member 28
7 AC ACC Intron Zm00001d019915 CASP-like protein
7 C T Intron Zm00001d021070 Pyruvate dehydrogenase4
7 TGGGACG T 5'-UTR Zm00001d021810 Protein strubbelig-receptor family 1
8 G T Intron Zm00001d012363 Protein strictosidine synthase-like 11
10 T A Intron Zm00001d024234 Terpene synthase 23
10 T A Intron Zm00001d025679 Putative MYB DNA-binding domain superfamily protein
10 A C Intron Zm00001d025679 Putative MYB DNA-binding domain superfamily protein
Table 1 Summary of genetic variations in 140RS516 mutant line.

UTR, Untranslated region.

Table 2 List of genetic variations on genic region of 140RS516 mutant line.

zChr., Chromosome.