Propagation path of a flowering cherry (Cerasus × yedoensis) cultivar ‘Somei-Yoshino’ traced by somatic mutations

Author:

Shirasawa Kenta1ORCID,Esumi Tomoya2ORCID,Itai Akihiro3,Hatakeyama Katsunori4ORCID,Takashina Tadashi5,Yakuwa Takuji6,Sumitomo Katsuhiko7,Kurokura Takeshi8,Fukai Eigo9,Sato Keiichi10,Shimada Takehiko11ORCID,Shiratake Katsuhiro12ORCID,Hosokawa Munetaka13,Monden Yuki14,Kusaba Makoto15ORCID,Ikegami Hidetoshi16,Isobe Sachiko1ORCID

Affiliation:

1. Department of Frontier Research and Development, Kazusa DNA Research Institute , Kisarazu , Japan

2. Academic Assembly Institute of Agricultural and Life Sciences, Shimane University , Matsue , Japan

3. Department of Agricultural and Life Science, Kyoto Prefectural University , Kyoto , Japan

4. Faculty of Agriculture, Iwate University , Morioka , Japan

5. Horticultural Research Institute, Yamagata Integrated Agricultural Research Center , Sagae , Japan

6. Yamagata Nishi High School , Yamagata , Japan

7. Institute of Vegetable and Floriculture Science, NARO , Tsukuba , Japan

8. Faculty of Agriculture, Utsunomiya University , Utsunomiya , Japan

9. Graduate School of Science and Technology, Niigata University , Niigata , Japan

10. Yamanashi Kofu Minami High School , Kofu , Japan

11. Institute of Fruit Tree and Tea Science, NARO , Shizuoka , Japan

12. Graduate School of Bioagricultural Sciences, Nagoya University , Nagoya , Japan

13. Department of Agricultural Science, Kindai University , Nara , Japan

14. Graduate School of Environmental and Life Science, Okayama University , Okayama , Japan

15. Graduate School of Integrated Sciences for Life, Hiroshima University , Higashi-Hiroshima , Japan

16. Resident , Fukuoka , Japan

Abstract

Abstract In the long history of human relations with flowering cherry trees in Japan, ‘Somei-Yoshino’ occupies an exceptional position among a variety of flowering trees: it is a self-incompatible interspecific hybrid but has been enthusiastically planted by grafting throughout Japan, due most likely to its flamboyant appearance upon full bloom. Thus, ‘Somei-Yoshino’ gives us a rare opportunity to trace and investigate the occurrence and distribution of somatic mutations within a single plant species through analysis of the genomes of the clonally propagated trees grown under a variety of geographical and artificial environments. In the studies presented here, a total of 46 samples of ‘Somei-Yoshino’ trees were collected and their genomes were analysed. We identified 684 single nucleotide mutations, of which 71 were present in more than two samples. Clustering analysis of the mutations indicated that the 46 samples were classified into eight groups, four of which included 36 of the 46 samples analysed. Interestingly, all the four tree samples collected in Ueno Park of Tokyo were members of the four groups mentioned above. Based on comparative analysis of their mutations, one of the four trees growing in Ueno Park was concluded to be the closest to the original ancestor. We propose that somatic mutations may be used as tracers to establish the ancestral relationship amongst clonally propagated individuals.

Funder

KAKENHI

DNA Research Institute Foundation

Publisher

Oxford University Press (OUP)

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