@article {142,
	title = {Biosystematic studies on the genus Isoetes in Japan I. Variations of the somatic chromosome numbers},
	journal = {Journal of Plant Research},
	volume = {107},
	year = {1994},
	note = {Cited By (since 1996):17Export Date: 11 November 2013Source: Scopus},
	month = {1994///},
	pages = {289 - 297},
	abstract = {The somatic chromosome number of three Japanese species of Isoetes, I. asiatica, I. japonica and I. sinensis, was determined in 199 individuals from 49 populations. The chromosome number of I. asiatica was 2 n=22, confirming previous reports. However, I. japonica and I. sinensis displayed a diversity in chromosome number. Six cytotypes, 2 n=66, 67, 77, 87, 88 and 89, were found in I. japonica; 2 n=67, 87, 88 and 89 are new counts in the genus Isoetes. The plants with 2 n=66 were the most frequent (72\% of total individuals examined) and were distributed throughout Honshu and Shikoku. The plants with 2 n=88 occurred in western Honshu and a limited region in northeastern Honshu where the plants with 2 n=77 were also found. In contrast, four cytotypes, 2 n=44, 65, 66 and 68, were found in I. sinensis. The chromosome numbers of I. sinensis were reported here for the first time. The plants with 2 n=44 occurred only in Kyushu, while the plants with 2 n=66 were found throughout a large area of western Japan. {\textcopyright} 1994 The Botanical Society of Japan.},
	keywords = {Aneuploid, Chromosome number, Cytogeography, Isoetes, Polyploid, Pteridophyta},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-21844512580\&partnerID=40\&md5=5cb0d06bc24499fb20d76da2946e91ea},
	author = {Takamiya, M. and Watanabe, M. and Ono, K.}
}
@article {45,
	title = {Genetic diversity and population structure of diploid and polyploid species of isoetes in east asia based on amplified fragment length polymorphism markers},
	journal = {International Journal of Plant Sciences},
	volume = {170},
	year = {2009},
	note = {Cited By (since 1996):5Export Date: 11 November 2013Source: Scopus},
	month = {2009///},
	pages = {496 - 504},
	abstract = {Isoetes L. is critically endangered in areas of East Asia, including Taiwan, Japan, and South Korea. The genetic diversity and the population structure of six Isoetes species from East Asia were evaluated by using amplified fragment length polymorphism (AFLP). Three AFLP-selective primer combinations generated a total 923 amplification products, of which 919 (99.6\%) were polymorphic. The levels of genetic diversity of two diploid species (I. taiwanensis [percentage of polymorphic loci (PPL) = 33.1\%-38.3\%] and I. asiatica [PPL = 49.0\%]) are higher than those of polyploid species (tetraploid: I. jejuensis [PPL = 9.3\%-29.3\%] and I. hallasanensis [PPL = 22.3\%]; hexaploid: I. coreana [PPL = 1.6\%-20.6\%] and I. japonica [PPL = 5.6\%-20.5\%]). Higher genetic differentiation was detected for populations of I. coreana (0B = 0.730) than for the diploid species I. taiwanensis (0B = 0.074). In addition, analysis of molecular variance showed that a large proportion (79.8\%) of genetic differentiation existed among population of I. coreana. However, 93.2\% of the total genetic variation was attributed to differentiation within populations of I. taiwanensis. A neighbor-joining dendrogram resulted in three clusters, one for I. asiatica, one for I. japonica, and one for the rest of the species, subdivided into two: (1) I. taiwanensis/I. jejuensis and (2) I. coreana/I. hallasanensis. Furthermore, individuals from each population of I. coreana and I. jejuensis were clustered into population-specific subclusters. The probable causes of the current pattern of genetic variation and population structure are discussed, and suggestions on the future protection of Isoetes species are also given. {\textcopyright} 2009 by The University of Chicago. All rights reserved.},
	keywords = {AFLP, Diploid, Genetic diversity, Isoetes, Polyploid, Population structure},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-67649230633\&partnerID=40\&md5=794650fbe3653559e7cb90004dfa45c6},
	author = {Kim, C. and Shin, H. and Choi, H.-K.}
}
