Karyotype studies of some species ofDalechampiaPlum. (Euphorbiaceae)
Karyotype studies in eight species ofDalechampia, including 10 natural populations, revealed chromosome numbers (2n= 36, 46, 138 and 198) differing from two numbers cited in the literature (2n= 44 and 72). The basic number x = 6, as in the genusAcalypha, may be considered ancestral inDalechampia. An...
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Published in | Botanical journal of the Linnean Society Vol. 125; no. 1; pp. 25 - 33 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Science Ltd
01.09.1997
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Subjects | |
Online Access | Get full text |
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Summary: | Karyotype studies in eight species ofDalechampia, including 10 natural populations, revealed chromosome numbers (2n= 36, 46, 138 and 198) differing from two numbers cited in the literature (2n= 44 and 72). The basic number x = 6, as in the genusAcalypha, may be considered ancestral inDalechampia. Analysis of chromosome number, haploid chromosome length and karyotype symmetry suggests that the major chromosome mechanism acting in karyotype evolution ofDalechampiais polyploidy, but differences in chromosome morphology may be caused by chromosome rearrangements. |
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ISSN: | 0024-4074 1095-8339 |
DOI: | 10.1006/bojl.1997.0107 |