Abstract
Yazhan is a restorer rice line bred by Jiangxi Tianya Seed Industry Co., LTD, and its hybrid combination has a high yield, excellent rice quality, and strong resistance. In this study, Yazhan, Huazhan, and Zhanhui 15 were used as the experimental materials. Based on agronomic traits, SSR primer screening and second-generation resequencing were conducted to study the genetic basis of Yazhan. The results showed that the plant height of Yazhan was significantly lower than Zhanhui 15, and the yield was not different from the parent lines. The genetic material on chromosome 1, 3, 4, 5, and 10 in the genome of Yazhan were mainly from Zhanhui 15, genetic materials from chromosomes 2, 6, 8, 9, 11, and 12 mainly come from Huazhan, and the chromosomes 1, 5, and 6 had the most variation. In terms of genomic similarity, Yazhan was more similar to the male parent (Huazhan). Yazhan and Huazhan carried the Wxb genotype, while Zhanhui 15 carried the Wxa genotype. The amylose contents of Yazhan and Huazhan were significantly lower than Zhanhui 15. Yazhan and Huazhan carried the Pita blast resistance gene, and Zhanhui 15 carried the Pita susceptibility gene. The results of this study provide a theoretical reference for elucidating the genetic composition of Yazhan and determining the main genetic sources of its important agronomic traits.
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Abbreviations
- AACC:
-
American Grain Chemical Association
- AC:
-
Amylose content
- BRR:
-
Brown rice rate
- CD:
-
Chalkiness degree
- CMS:
-
Cytoplasmic male sterility
- CS:
-
Chalkiness size
- EPN:
-
Effective panicle number
- FGN:
-
Filled grain number per panicle
- GC:
-
Gel consistency
- HRR:
-
Head rice rate
- LWR:
-
Length-width ratio
- WRR:
-
White rice rate
- PaT:
-
Pasting temperature
- PGWC:
-
Percentage of grains with chalkiness
- PH:
-
Plant height
- PL:
-
Panicle length
- PKV:
-
Peak viscosity
- P/TMS:
-
Photoperiod/Temperature sensitive genic male sterility
- RVA:
-
Rice starch viscosity characteristic analysis
- SS:
-
Seed setting rate
- TCW:
-
Thermal Cycle for Windows
- TGN:
-
Total grain number per panicle
- TGW:
-
1000-grain weight
- YP:
-
Yield per plant
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Funding
This study was financially supported by the National Key Research and Development Program of China (2016YFD0101104), Major project of Jiangxi Provincial Department of Science and Technology (S2016NYZPF0256).
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Key Message
Based on agronomic traits, SSR primer screening and second-generation resequencing was conducted to study the genetic basis of Yazhan. Genetic basis revealed that the chromosomes 1, 5, and 6 had the most variation in the genome of Yazhan. Yazhan was more similar to the male parent (Huazhan) in genomic similarity. Yazhan and Huazhan carried the Wxb genotype and the Pita blast resistance gene, while Zhanhui 15 carried the Wxa genotype and the Pita susceptibility gene.
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Li, S., Yu, Q., Sun, Y. et al. Genetic Analysis of Rice Restorer Line Yazhan. Plant Mol Biol Rep 38, 394–403 (2020). https://doi.org/10.1007/s11105-020-01201-6
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DOI: https://doi.org/10.1007/s11105-020-01201-6