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Genetic and morphological analysis of two novel nutsedge biotypes from California

Published online by Cambridge University Press:  20 January 2017

Rana I. Tayyar ,
Jamie H. T. Nguyen  and
Jodie S. Holt
Rana I. Tayyar
Affiliation:
Department of Botany and Plant Sciences, University of California, Riverside, CA 92521
Jamie H. T. Nguyen
Affiliation:
Department of Botany and Plant Sciences, University of California, Riverside, CA 92521
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Abstract

The identities of two novel perennial nutsedge biotypes collected near Bakersfield, CA, were assessed using isozyme and random-amplified polymorphic deoxyribonucleic acid markers in conjunction with morphological analysis. The two biotypes, designated as CK (Cyperus rotundus cv. ‘Kempeni’) and CR (Cyperus esculentus cv. ‘Robusta’), morphologically resemble purple nutsedge and yellow nutsedge, respectively. Plants from both biotypes exhibited more prolific growth than the typical forms and possessed some traits that are not characteristic of the species they resemble. The morphological study was conducted on a total of 15 purple nutsedge, yellow nutsedge, CK, and CR populations collected in the first year and on 20 additional nutsedge populations were collected in the second year. The genetic analysis was performed on populations from the first year only. In general, there was agreement among the results obtained from the morphometric, isozymatic, and deoxyribonucleic acid studies. Populations of CR clustered with yellow nutsedge populations, indicating that CR is within the normal range of variation of this species and may represent a new introduction. Populations of CK, however, were distinct from both purple nutsedge and yellow nutsedge populations. Considering the low level of genetic variation reported in purple nutsedge and its strict vegetative mode of reproduction, CK might represent a sexually reproducing ecotype of purple nutsedge or a hybrid with yellow nutsedge.

Keywords

Purple nutsedge, Cyperus rotundus L., CYPROyellow nutsedge, Cyperus esculentus L., CYPESBiotypesisozyme analysismorphological analysisRAPD analysis
Type
Weed Biology
Information
Weed Science , Volume 51 , Issue 5 , October 2003 , pp. 731 - 739
Copyright
Copyright © Weed Science Society of America 

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