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- Title
ISSR Variation in the Endemic and Endangered Plant Cycas guizhouensis (Cycadaceae).
- Authors
LONG-QIAN XIAO; XUE-JUN GE; XUN GONG; GANG HAO; SI-XIANG ZHENG
- Abstract
• Background and AimsCycas guizhouensis (Cycadaceae) is a rare and endangered species endemic to the southwest of China. An investigation was undertaken into the genetic variation of wild populations.• Methods ISSR markers were used to determine the genetic variation within and between 12 extant populations of this species.• Key Results Low genetic diversity (at population level, P = 14·21 %, HE = 0·0597; at species level, P = 35·90 %, HT = 0·1082) and a high degree of differentiation among populations (GST = 0·4321) were detected.• Conclusions This genetic structure is considered to be due to the combined effects of slow biochemical evolution, genetic drift, inbreeding and limited gene flow between populations. Based on these findings, strategies are proposed for the genetic conservation and management of the species.
- Subjects
ENDANGERED plants; ENDANGERED species; CYCAS; PLANT genetics; NATURE conservation
- Publication
Annals of Botany, 2004, Vol 94, Issue 1, p133
- ISSN
0305-7364
- Publication type
Article
- DOI
10.1093/aob/mch119