Efficient double-flowered gentian plant production using the CRISPR/Cas9 system
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- Nishihara Masahiro
- Iwate Biotechnology Research Center
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- Hirabuchi Akiko
- Iwate Biotechnology Research Center
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- Goto Fumina
- Iwate Biotechnology Research Center
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- Watanabe Aiko
- Iwate Biotechnology Research Center
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- Yoshida Chiharu
- Iwate Biotechnology Research Center
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- Washiashi Rie
- Iwate Biotechnology Research Center
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- Odashima Masashi
- Iwate Agricultural Research Center
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- Nemoto Keiichirou
- Iwate Biotechnology Research Center
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抄録
<p>Japanese cultivated gentians are highly valued ornamental flowers in Japan, but the flower shape is mostly limited to the single-flower type, unlike other flowers such as roses and carnations. To overcome this limitation, we used the CRISPR/Cas9 genome editing system to increase double-flowered genetic resources in gentians. Our approach targeted an AGAMOUS (AG) floral homeotic gene (AG1), which is responsible for the natural mutation that causes double flowers in gentians. We designed two targets in exon 1 of AG1 for genome editing and found that 9 of 12 herbicide-resistant shoots had biallelic mutations in the target regions of AG1. These nine lines all produced double flowers, with stamens converted into petaloid organs, similar to the natural mutant. We also analyzed the off-target effects of AG2, which is homologous to AG1, and found that such effects occurred in gentian genome editing but with low frequency. Furthermore, we successfully produced transgene-free genome-edited plants (null segregants) by crossing with wild-type pollen. F1 seedlings were subjected to PCR analysis to determine whether foreign DNA sequences, two partial regions of the CaMV35S promoter and Cas9 gene, were present in the genome. As a result, foreign genes were segregated at a 1 : 1 ratio, indicating successful null segregant production. Using PCR analysis, we confirmed that four representative null segregants did not contain transfer DNA. In summary, our study demonstrates that the CRISPR/Cas9 system can efficiently produce double-flowered gentians, and null segregants can also be obtained. These genome-edited plants are valuable genetic resources for future gentian breeding programs.</p>
収録刊行物
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- Plant Biotechnology
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Plant Biotechnology 40 (3), 229-236, 2023-09-25
日本植物バイオテクノロジー学会
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詳細情報 詳細情報について
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- CRID
- 1390297582102667776
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- NII書誌ID
- AA11250821
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- ISSN
- 13476114
- 13424580
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- NDL書誌ID
- 033156621
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可