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Genetic Variation in Yellow Nutsedge (Cyperus esculentus)

Published online by Cambridge University Press:  12 June 2017

Michael J. Horak,
Jodie S. Holt and
Norman C. Ellstrand
Michael J. Horak
Affiliation:
Dep. Bot. and Plant Sci., Univ. California, Riverside, CA 92521-0124
Jodie S. Holt
Affiliation:
Dep. Bot. and Plant Sci., Univ. California, Riverside, CA 92521-0124
Norman C. Ellstrand
Affiliation:
Dep. Bot. and Plant Sci., Univ. California, Riverside, CA 92521-0124
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Abstract

Genetic diversity within and among populations of yellow nutsedge (Cyperus esculentus L. # CYPES) was analyzed to evaluate and quantify the genetic consequences of the reported predominance of asexually-produced tubers as colonizing agents. Ten populations were examined using starch gel electrophoresis for allozyme analysis. Four populations of purple nutsedge (Cyperus rotundus L. # CYPRO) were surveyed for comparison. Twelve loci were identified in yellow nutsedge among the eight enzyme systems examined; ten of these loci were found in purple nutsedge. Yellow nutsedge showed relatively low genetic diversity. Most of the genetic diversity occurred as differences among individuals within populations (Hs ), compared to differences among populations (Dst ) for the four variable loci identified in this species. Thus, most genetic distances between its populations were small. Generally, only a few genotypes occurred within each population. Purple nutsedge was found to possess even lower within- and among-population gene and genotypic diversity. This study supports the view that tubers account for most of the establishment of new populations of both species.

Keywords

Clonal reproductionseed reproductionisozyme analysispurple nutsedgeCyperus rotundusCYPESCYPRO

Information

Type
Weed Biology and Ecology
Information
Weed Science , Volume 35 , Issue 4 , July 1987, pp. 506 - 512
Copyright
Copyright © 1987 by the Weed Science Society of America 

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