DNA Contents and Karyotypes of the Natural Hybrids in Taraxacum (Asteraceae) in Japan

Hamaguchi, T., M. Watanabe, N. Yamaguchi, & S. Serizawa. 2000. Distribution of hybridized alien dandelions in Hiratsuka City, Kanagawa Prefecture. Nat.

Hist. Rep. Kanagawa 21: 7–21 (in Japanese).

Hotta, M. 1977. On the distribution of dandelions (Taraxacum) in Kinki district. Studies on Natural History

(Shizennshi-Kenkyu) 1: 117–134 (in Japanese with

English summary).

Ide, M., T. Uetake, H. Shibaike, Y. Kusumoto, S. Hiradate, H. Yano, A. Hoya, Y. Yoshimura & N. Shimizu.

2005. A study on the environmental characteristics of

habitat and the genetic structure of Taraxacum species (dandelions) in the campus of National Institute

June 2021

Watanabe & al. — The Natural Hybrids in Taraxacum

of Livestock and Grassland Science. Landscape Res.

J. 69: 545–548 (in Japanese with English abstract).

Ito, M., J. Miyamoto, Y. Mori, S. Fujimoto, T. Uchiumi,

M. Abe, A. Suzuki, S. Tabata & K. Fukui. 2000. Genome and chromosome dimensions of Lotus japonicus. J. Pl. Res. 113: 435–442.

Kirschner, J & J. Stepanek. 1996. Modes of speciation

and evolution of the sections in Taraxacum. Folia

Geobot. Phytotax. 31: 415–426.

Kirschner, J. & J. Stepanek. 1997. A nomenclatural

checklist of supraspecific names in Taraxacum. Taxon 46: 87–98.

Kirschner, J. & J. Stepanek. 2011. Typification of Leontodon Taraxacum L. (≡ Taraxacum officinale F. H.

Wigg.) and the generic name Taraxacum: A review

and a new typification proposal. Taxon 60: 216–220

Kirschner, J., J. Stepanek & W. Greuter. 2007 onwards.

Taraxacum. - In: Greuter, W. & E. von Raab-Straube

(eds.), Compositae. Euro+MedPlantbase–The information resource for Euro-Mediterranean plant diversity. <http://ww2.bgbm.org/EuroPlusMed/PTaxonDetail.

asp?NameCache=Taraxacum> [accessed Jan. 1, 2020].

Majesky, L., F. Krahulec & R. J. Vasut. 2017. How apomictic taxa are treated in current taxonomy: A review. Taxon 66: 1017–1040.

Makino, T. 1904. Dandelions in Japan (Nihon no tanpopo). Bot. Mag. Tokyo 18: 92–93 (in Japanese).

Morita, T. 1976. Geographical distribution of diploid and

polyploid Taraxacum in Japan. Bull. Natl. Sci. Mus.

Ser. B. (Bot.) 2: 23–38 (in Japanese with English summary).

Morita, T. 1988. Recent topics about Taraxacum agamospermy. Collecting & Breeding (Saishyu to Shiiku)

50: 128–132 (in Japanese).

Morita, T. 1995. Taraxacum. In: Iwatsuki, K., T. Yamazaki, D. E. Boufford & H. Ohba (eds.). Flora of Japan

IIIb, Angiospermae, Dicotyledoneae (b), pp. 7–13.

Kodansha, Tokyo.

Morita, T., A. A. Sterk & J. C. M. den Nijs. 1990. The significance of agamospermous triploid pollen donors in

the sexual relationships between diploids and triploids in Taraxacum (Compositae). Pl. Spec. Biol. 5:

167–176.

Nehira, K., M. Segawa, Y. Kobayashi & N. Kaneda.

1977a. On the distribution of dandelions (Taraxacum)

in Hiroshima City. Plant and Nature (Shokubutsu to

Shizen) 11: 18–20 (in Japanese).

Nehira, K., M. Segawa, Y. Kobayashi & N. Kaneda.

1977b. On the distribution of dandelions (Taraxacum)

around the Hiroshima Castle. Plant and Nature

(Shokubutsu to Shizen) 11: 16–18 (in Japanese).

Nehira, K., M. Nagahiro & K. Kondo. 1979. On the distribution of dandelions in Seto-Naikai Area. Stud. Env.

Sci. Mem Integr. Arts Sci Hiroshima Univ. 55–64 (in

Japanese with English summary).

Nisioka, T. 1956. Karyotype analysis in Japanese

143

Cichorieae. Bot. Mag. Tokyo 69: 586–591.

Ogawa, K. & I. Mototani. 1985. Invasion of the introduced dandelions and survival of the native ones in

the Tokyo Metropolitan Area of Japan. Jap. J. Ecol.

35: 443–452.

Ogawa, K. & I. Mototani. 2001. Changes in the occurrence of native diploid and introduced triploid Taraxacum species in the southern Kanto District during

the past decade. Wildlife Conservation Japan 6: 1–14

(in Japanese with English summary).

Richards, A. J. 1985. Sectional nomenclature in Taraxacum (Asteraceae). Taxon 34: 63–3644.

Rothfels, K., E. Sexsmith, M. Heimburger & M. O.

Krause. 1966. Chromosome size and DNA content of

species of Anemone L. and related genera (Ranunculaceae). Chromosoma (Berlin) 20: 54–74.

Sato, K., Y. Iwatsubo, M. Watanabe & M. Ohta. 2004. Taraxacum officinale complex in Mt Tateyama. Bull.

Toyama Sci. Mus. 27: 53–60 (in Japanese with English summary).

Sato, K., Y. Iwatsubo, M. Watanabe, S. Serizawa & N.

Naruhashi. 2007a. Chromosome numbers of Taraxacum officinale (Asteraceae) in Tateyama Prefecture,

central Japan. J. Phytogeogr. Taxon 55: 1–7.

Sato, K., Y. Iwatsubo & N. Naruhashi. 2007b. Chromosome studies of native lowland diploid species of Taraxacum (Asteraceae) in Japan. Cytologia 72: 309–

317.

Sato, K., Y. Iwatsubo, M. Watanabe, S. Serizawa & N.

Naruhashi. 2007c. Cytogenetic study of Japanese

triploid Taraxacum officinale (common dandelion;

Asteraceae). Cytologia 72: 475–482.

Sato, K., Y. Iwatsubo, M. Ohta, T. Matsuhisa & N. Naruhashi. 2008. Chromosome numbers of Taraxacum

officinale (Asteraceae) distributed in some high

mountains in Central Honshu, Japan. J. Jap. Bot. 83:

115–120.

Sato, K., T. Yamazaki & Y. Iwatsubo. 2014. Chromosome

diversity of Taraxacum officinale Weber ex F. W.

Wigg s.l. (common dandelion; Asteraceae). Cytologia

79: 39–5408.

Shibaike, H., H. Akiyama, S. Uchiyama, K. Kasai & T.

Morita. 2002. Hybridization between European and

Asian dandelions (Taraxacum section Ruderalia and

section Mongolica) 2. Natural hybrids in Japan detected by chloroplast DNA marker. J. Plant Res. 11:

321–328.

Sorensen, T. H. & G. Gudjonsson. 1946. Spontaneous

chromosome-abberrants in apomictic Taraxaca.

Kongel. Danske Vidensk. Selesk. Biol. Skr. 4: 1–48.

Takemoto, T. 1961. Cytological studies on Taraxacum

and Ixeris. I. Some Japanese species of Taraxacum.

Bull. School Educ. Okayama Univ. 11: 77–94.

Watanabe, K. 2020. Index to Chromosome Numbers in

Asteraceae. <http://www.lib.kobe-u.ac.jp/infolib/meta_

pub/G0000003asteraceae> [accessed Jan. 1, 2020]

144

Acta Phytotax. Geobot.

Watanabe, M., Y. Maruyama & S. Serizawa. 1997a. Hybridization between native and alien dandelions in

the Western Tokai district. (1) Frequency and morphological characters of the hybrid between Taraxacum platycarpum and T. officinale. J. Jap. Bot. 72:

51–57.

Watanabe, M., Y. Maruyama & S. Serizawa. 1997b. Hybridization between native and alien dandelions in

the Western Tokai district. (2) Frequency and morphological characters of the hybrid between Taraxacum platycarpum and T. laevigatum. J. Jap. Bot. 72:

352–356.

Watanabe, M., M. Ogawa, S. Serizawa, M. Kanzaki & T.

Mamakura. 1997c. Intrusion of hybridized alien dandelions into the native dandelion’s habitats. Acta Phytotax. Geobot. 48: 73–78 (in Japanese with English

summary).

Watanabe, M., M. Ogawa, M. Naitou, M. Kanzaki, H.

Shimomura & S. Serizawa. 1997d. Frequency and

distribution of hybridized alien dandelion in Osaka

Prefecture. Bull. Kansai Organ. Nature Conserv.

Vol. 72

(Kansai-shizenhogokikou-Kaisha) 19: 69–77 (in Japanese).

Yamaguchi, S. 1974. Karyotype analysis in Japanese Taraxacum. I. T. maruyamanum, T. japonicum and T.

platycarpum. Proc. Japan Soc. Plant Taxonomist 3:

15–16 (in Japanese with English summary).

Yamaguchi, S. 1986. Karyotype analysis of the Japanese

diploid species of Taraxacum, sec. Mongolica and

sect. Ceratophora. Kromosomo II 43–44: 1386–1397.

Yamano, M., H. Shibaike, T. Hamaguchi & M. Ide. 2002.

Analysis on the distribution patterns of hybrid dandelions (Taraxacum) in Japan corroborated with the

“Environmental indicator species survey” of common wildlife. Pap. Environ. Inform Sci. 16: 357–362

(in Japanese with English summary).

Yamano, M., M. Ide & H. Shibaike. 2003. Analysis on relationships between landscape structures and distribution patterns for native and hybrid dandelions (Taraxacum) in Tsukuba-city, Ibaraki Pref. Landscape

Research J. 67: 587–590 (in Japanese with English

summary).

Received January 6, 2020; accepted September 3, 2020

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