We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
방사선 유도 내염성 증진 사료용 옥수수 돌연변이체 특성 분석.
- Authors
조철오; 김경화; 최만수; 전재범; 서미숙; 정남희; 진민아; 손범영; 김둘이
- Abstract
Salt stress is a significant factor limiting growth and productivity in crops. However, little is known about the response and resistance mechanism to salt stress in maize. The objective of this research was to develop an enhanced salt-tolerant silage maize by mutagenesis with gamma radiation. To generate gamma radiation-induced salt-tolerant silage maize, we irradiated a KS140 inbred line with 100 Gy gamma rays. Salt tolerance was determined by evaluating plant growth, morphological changes, and gene expression under NaCl stress. We screened 10 salt-tolerant maize inbred lines from 2,248 M2 mutant populations and selected a line showing better growth under salt stress conditions. The selected 140RS516 mutant exhibited improved seed germination and plant growth when compared with the wild-type under salt stress conditions. Enhanced salt tolerance of the 140RS516 mutant was attributed to higher stomatal conductance and proline content. Using whole-genome re-sequencing analysis, a total of 328 single nucleotide polymorphisms and insertions or deletions were identified in the 140RS516 mutant. We found that the expression of the genes involved in salt stress tolerance, ABP9, CIPK21, and CIPK31, was increased by salt stress in the 140RS516 mutant. Our results suggest that the 140RS516 mutant induced by gamma rays could be a good material for developing cultivars with salt tolerance in maize.
- Subjects
GAMMA rays; SINGLE nucleotide polymorphisms; GERMINATION; GENE expression; PLANT growth; CORN growth
- Publication
Korean Journal of Breeding Science, 2019, Vol 51, Issue 4, p318
- ISSN
0250-3360
- Publication type
Article
- DOI
10.9787/KJBS.2019.51.4.318