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JXB Advance Access originally published online on May 4, 2009
Journal of Experimental Botany 2009 60(9):2493-2499; doi:10.1093/jxb/erp120
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© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

REVIEW-ARTICLE

Update on the genetic control of flowering in garden pea

James L. Weller*, Valérie Hecht, Lim Chee Liew, Frances C. Sussmilch, Bénédicte Wenden {dagger}, Claire L. Knowles {ddagger} and Jacqueline K. Vander Schoor

School of Plant Science, University of Tasmania, Private Bag 55, Hobart, Tasmania 7001, Australia

* To whom correspondence should be addressed: E-mail: jim.weller{at}utas.edu.au

The garden pea has been a model for the genetics of flowering for several decades and numerous flowering loci have been identified, but until recently little was known about the molecular nature of these loci. This paper presents an update on recent work on the molecular genetics of flowering in pea, outlining progress in gene and mutant isolation, expression analyses, grafting and other physiological studies, and candidate gene assessment. Work so far has led to the identification of the LATE1 and DNE loci as orthologues of Arabidopsis GIGANTEA and ELF4, respectively, and candidate genes for several other loci are being evaluated. Expression analysis of an expanded FT-like gene family suggests a more complex role for this group of genes. These results provide the first insight into the circadian clock, photoperiod response mechanism, and mobile signals in pea, and identify both conserved and divergent features in comparison with Arabidopsis.

Key words: Circadian clock, flowering, Medicago, mobile signals, pea, photoperiod, photoreceptor

{dagger} Present address: Station de Génétique et Amélioration des Plantes, INRA Centre de Versailles, F-78026 Versailles, France.

{ddagger} Present address: Menzies Research Institute, Hobart, Tasmania 7001, Australia.

Received 23 February 2009; Revised 19 March 2009 Accepted 23 March 2009


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