Population genetic structure of the medicinal plant Vitex rotundifolia in China: implications for its use and conservation.

Abstract:

:Vitex rotundifolia L. is an important plant species used in traditional Chinese medicine. For its efficient use and conservation, genetic diversity and clonal variation of V. rotundifolia populations in China were investigated using inter-simple sequence repeat markers. Fourteen natural populations were included to estimate genetic diversity, and a large population with 135 individuals was used to analyze clonal variation and fine-scale spatial genetic structure. The overall genetic diversity (GD) of V. rotundifolia populations in China was moderate (GD = 0.190), with about 40% within-population variation. Across all populations surveyed, the average within-population diversity was moderate (P = 22.6%; GD = 0.086). A relatively high genetic differentiation (G(st) = 0.587) among populations was detected based on the analysis of molecular variance data. Such characteristics of V. rotundifolia are likely attributed to its sexual/asexual reproduction and limited gene flow. The genotypic diversity (D = 0.992) was greater than the average values of a clonal plant, indicating its significant reproduction through seedlings. Spatial autocorrelation analysis showed a clear within-population structure with gene clusters of approximately 20 m. Genetic diversity patterns of V. rotundifolia in China provide a useful guide for its efficient use and conservation by selecting particular populations displaying greater variation that may contain required medicinal compounds, and by sampling individuals in a population at >20 m spatial intervals to avoid collecting individuals with identical or similar genotypes.

journal_name

J Integr Plant Biol

authors

Hu Y,Zhu Y,Zhang QY,Xin HL,Qin LP,Lu BR,Rahman K,Zheng HC

doi

10.1111/j.1744-7909.2008.00635.x

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

1118-29

issue

9

eissn

1672-9072

issn

1744-7909

pii

JIPB635

journal_volume

50

pub_type

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