National BioResource Project
Last update： May 19, 2017
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One of the most crucial future tasks in plant science research is to elucidate diversity in various biological phenomena at the molecular level.
Asteraceae is a representative family among dicotyledonous plants, which accounts for approximately one-tenth of angiosperms.
In this regard, Asteraceae resources are considered to be significantly important. This project aims to provide plants belonging to the genus Chrysanthemum and related genera (tribe Anthemideae) and their research resources.
The so-called mums (cultivated chrysanthemum or Chrysanthemum morifolium), which belong to representative species of the genus Chrysanthemum, are not only culturally well-associated with Japan but also industrially important, accounting for one-third of cut flowers produced in Japan.
In addition, although Chrysanthemum is distributed primarily in East Asia, many Japan’s indigenous strains and non-negligible members of endangered species exist; thus, Chrysanthemum is considered a crucial resource that needs to be proactively preserved in Japan.
Cultivated chrysanthemum has a highly polyploid genome and is self-incompatible, and thus, it is unsuitable for molecular genetics research.
Therefore, model cultivated chrysanthemum species that can serve as a reference resource need to be established. For such a model plant strain, we have been recently focusing on a self-compatible strain of Chrysanthemum seticuspe, a diploid wild chrysanthemum.
This strain is expected to play an important role in research elucidating various properties of species belonging to the genus Chrysanthemum.
- Wild strains
- Experimental strains
Distribution / Deposition
Plants belonging to the genus Chrysanthemum exhibit the property of self-incompatibility, wherein seeds cannot be obtained if the pistil is pollinated with pollen of the same plant.
Therefore, unlike many model plants, it is difficult to obtain pure strains or mutants of chrysanthemum.
In addition, representative cultivated chrysanthemum species belonging to the genus Chrysanthemum have hexaploid genomes and are thus unsuitable for genetics research.
We, however, successfully obtained a self-compatible chrysanthemum strain from diploid and wild C. seticuspe (Fig. A), which is suitable for genetics research.
A recessive albino mutant can be isolated by self-fertilizing the strain (Fig. B). It is expected that this strain can be used to consolidate a molecular genetics analysis platform for the genus Chrysanthemum.
Panel exhibition at the The 32nd Annual Meeting of the Molecular Biology Society of Japan.