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Plant and Cell Physiology, 2002, Vol. 43, No. 5 563-572
© 2002 Oxford University Press

Male Specific Genes from Dioecious White Campion Identified by Fluorescent Differential Display

Charles P. Scutt1,3, Tom Jenkins1, Masaki Furuya2 and Philip M. Gilmartin1,4

1 Centre for Plant Sciences, University of Leeds, Leeds LS2 9JT, U.K. 2 Hitachi Advanced Research Laboratory, Hatoyama, Saitama, 350-0395 Japan

Fluorescent differential display (FDD) has been used to screen for cDNAs that are differentially up-regulated in male flowers of the dioecious plant Silene latifolia in which an X/Y chromosome system of sex determination operates. To adapt FDD to the cloning of large numbers of differential cDNAs, a novel method of confirming the differential expression of these has been devised. FDD gels were Southern electro-blotted and probed with mixtures of individual cDNA clones derived from different FDD product ligation reactions. These Southern blots were then stripped and re-probed with further mixtures of individual cloned FDD products to identify the maximum number of recombinant clones carrying the true differential amplification products. Of 135 differential bands identified by FDD, 56 differential amplification products were confirmed; these represent 23 unique differentially expressed genes as determined by virtual Northern analysis and two genes expressed at or below the level of detection by virtual Northern analysis. These two low expressed genes show bands of hybridization on genomic Southern blots that are specific to male plants, indicating that they are derived from, or closely related to, Y chromosome genes.

3 Current address: Reproduction et Developpement des Plantes, Ecole Normale Superieure de Lyon, 46 Allee d’Italie, F-69364 Lyon cedex 07, France

4 Corresponding author: E-mail, p.m.gilmartin@bmb.leeds.ac.uk; Fax, +44-113-233-3144.


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