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| TITLE | A morphometric analysis of infraspecific taxa within the Ixeris chinensis complex (Asteraceae, Lactuceae) |
| AUTHOR | Sung Soo Whang Division of Science Education, Chonbuk National University, Chonju 561-756, Republic of Korea Kyung Choi Department of Biology, Yeungnam University, Keongbuk 712-749, Republic of Korea Robert S. Hill Department of Environmental Biology, University of Adelaide, SA 5005, Australia JaeHong Pak Department of Biology, Kyungpook National University, Taegu 702-701, Republic of Korea |
| FULL TEXT | [in HTML format] [in PDF format] |
| ABSTRACT | Morphometric methods were used with 40 morphological characters from each of 110 individuals collected from 11 populations of the Ixeris chinensis complex to test hypotheses regarding infraspecific taxa. Individuals of the nearest relative I. tamagawaensis were included as an outgroup. To utilize structual associations of the original data and the cumulative values of character variation, a modified data set was generated by matching factor scores with the large original data set. As a result, the original data was reduced to about 10% of its original size. The modified data also emphasized the cumulative values of character variations. Structural associations among characters measured, however, were not significant for most factors extracted even though some obvious trends appeared. Relationships between cumlative values of variation and taxa in the complex are discussed based on the results of the canonical discriminant function analysis, ANOVA, multiple comparison test, and cluster analysis, using the modified data. This study supports Kitamura's (1956) classification of infraspecific taxa in the I. chinensis complex. Given that there is no overlap of cumulative values of variation between the species complex and I. tamagawaensis, there is probably a 75% character overlap within the complex. |
| KEYWORD | Ixeris chinensis complex; Infraspecific taxa; Morphometric analysis; |
| ARTICLE INFO | Botanical Bulletin of Academia Sinica, Volume 43 Number 2 April 2002, page 131-138, 8 pages |
| PUBLISHER | Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China |
