- 著者
- Shuri Kato Asako Matsumoto Kensuke Yoshimura Toshio Katsuki Kojiro Iwamoto Yoshiaki Tsuda Shogo Ishio Kentaro Nakamura Kazuo Moriwaki Toshihiko Shiroishi Takashi Gojobori Hiroshi Yoshimaru
- 出版者
- 日本育種学会
- 雑誌
- Breeding Science (ISSN:13447610)
- 巻号頁・発行日
- vol.62, no.3, pp.248-255, 2012 (Released:2012-11-01)
- 参考文献数
- 36
- 被引用文献数
- 4 18
Numerous cultivars of Japanese flowering cherry (Prunus subgenus Cerasus) are recognized, but in many cases they are difficult to distinguish morphologically. Therefore, we evaluated the clonal status of 215 designated cultivars using 17 SSR markers. More than half the cultivars were morphologically distinct and had unique genotypes. However, 22 cultivars were found to consist of multiple clones, which probably originate from the chance seedlings, suggesting that their unique characteristics have not been maintained through propagation by grafting alone. We also identified 23 groups consisting of two or more cultivars with identical genotypes. Most members of these groups were putatively synonymously related and morphologically identical. However, some of them were probably derived from bud sport mutants and had distinct morphologies. SSR marker analysis provided useful insights into the clonal status of the examined Japanese flowering cherry cultivars and proved to be a useful tool for cultivar characterization.
- 著者
- Toyoyuki Takada Toshihiko Shiroishi
- 出版者
- 公益社団法人 日本実験動物学会
- 雑誌
- Experimental Animals (ISSN:13411357)
- 巻号頁・発行日
- vol.61, no.4, pp.375-388, 2012 (Released:2012-07-26)
- 参考文献数
- 68
- 被引用文献数
- 4 6 4
Mammalian quantitative traits that are observed at the whole-body level, such as body weight and length and blood biochemical parameters, are determined by the cooperative effects of multiple genetic and epigenetic factors as well as environmental factors. This complexity has hampered the genetic analysis of quantitative traits. To overcome this difficulty, we have established a full set of consomic mouse strains, also known as chromosome substitution strains, by replacing every chromosome of the classical inbred strain C57BL/6J with its counterpart from the Japanese wild-mouse-derived inbred strain MSM/Ms. The core components of the genomes of these two strains originated from different mouse subspecies. The inter-subspecific large-genome divergence and phenotypic differences between the two strains allowed the identification of genetic determinants for many quantitative traits by comprehensive phenotype screening. For some quantitative traits, the genetic determinants could be dissected into multiple chromosomes, thereby reflecting strain differences between C57BL/6J and MSM/Ms and their simple additive effects on the background of the consomic host strain. For other quantitative traits, the measured values of some consomic strains often far exceeded the range of the two parental strains, which suggests that nonadditive genetic interactions occur among multiple genes located on the substituted MSM/Ms chromosomes and the consomic host chromosomes. Thus, the inter-subspecific consomic strains are unique tools that can be used to identify both additive and nonadditive genetic effects on quantitative complex traits.