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Karyotype studies in thirty‐two species of Lilium (Liliaceae) from China 1
Author(s) -
Gao YunDong,
Zhou SongDong,
He XingJin
Publication year - 2011
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.2011.01069.x
Subject(s) - biology , lilium , subgenus , karyotype , liliaceae , ploidy , botany , genus , taxon , chromosome , population , evolutionary biology , zoology , genetics , gene , demography , sociology
Fifty‐two populations representing thirty‐two taxa of Lilium L. from China are karyologically analyzed. The results showed that all populations have the same basic chromosome number x=12, and all species are diploid except Lilium tigrinum , which is triploid with 2n=36. In addition, one population of L. sulphureum is aneuploid with 2n=23. The karyotype evolution in the genus Lilium is mainly in terms of alterations of the fine structure of the chromosomes, not in ploidy or basic chromosome number variation. When combining previous studies and our results, we consider the major driving forces for evolution of Lilium to be an increase in karyotypic asymmetry, and unequal translocation and formation of secondary constrictions. The existence of intercalary satellites on the two largest pairs of chromosomes is correlated with the geographic distribution pattern of Lilium across the world. The Hengduan Mountains is a modern diversity and differentiation center of Lilium and it also could be the center of origin for this genus. In addition, some taxonomic conclusions were verified on the subgenus level. Among the species investigated, the chromosome number and karyotypes of 13 taxa were documented for the first time.