The genetics of sex determination in stinging nettle (<Emphasis Type="Italic">Urtica dioica</Emphasis>) |
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Authors: | Robynn K Shannon Kent E Holsinger |
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Institution: | (1) Department of Ecology and Evolutionary Biology, University of Connecticut, U-3043, 75 North Eagleville Road, Storrs, CT 06269-3043, USA;(2) Present address: Biology Department, Goddard Hall, Eastern Connecticut State University, 83 Windham Street, Willimantic, CT 06226-2295, USA |
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Abstract: | Urtica dioica (“stinging nettle”) includes both dioecious and monoecious forms. In most sexually dimorphic angiosperm species, the genetic
mechanisms of sex determination are completely unknown. The few species that include both monoecious and dioecious forms provide
an unusual opportunity to examine the genetic mechanisms that underlie the separation of sexual functions, through crossing
experiments and analysis of progeny segregation. Our focus is on the genetic mechanisms distinguishing monoecious and dioecious
forms of U. dioica. A complicated picture of sex determination in this species has resulted from crosses between dioecious and monoecious subspecies,
as well as between dioecious and monoecious forms of the same subspecies. Most significant is evidence for a maternal influence
on sex determination and for the possibility of gynodioecy as an intermediate stage in the evolutionary pathway to dioecy.
Electronic supplementary material Supplementary material is available in the online version of this article at and is accessible for authorized users. |
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Keywords: | Sex determination Dioecy Monoecy Cytonuclear sex determination Sexual dimorphism |
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