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Science 26 October 2007:
Vol. 318. no. 5850, pp. 643 - 645
DOI: 10.1126/science.1148428
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Reports

Changes in Regulation of a Transcription Factor Lead to Autogamy in Cultivated Tomatoes

Kai-Yi Chen,1,2*{dagger} Bin Cong,1,2* Rod Wing,3 Julia Vrebalov,4 Steven D. Tanksley1,2{ddagger}

We report the cloning of Style2.1, the major quantitative trait locus responsible for a key floral attribute (style length) associated with the evolution of self-pollination in cultivated tomatoes. The gene encodes a putative transcription factor that regulates cell elongation in developing styles. The transition from cross-pollination to self-pollination was accompanied, not by a change in the STYLE2.1 protein, but rather by a mutation in the Style2.1 promoter that results in a down-regulation of Style2.1 expression during flower development.

1 Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY 14853, USA.
2 Department of Plant Biology, Cornell University, Ithaca, NY 14853, USA.
3 Department of Plant Sciences, Arizona Genomics Institute, University of Arizona, Tucson, AZ 85721, USA.
4 U.S. Department of Agriculture, Agricultural Research Service, Plant, Soil, Nutrition Lab and Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY 14853, USA.

* These authors contributed equally to this work

{dagger} Present address: National Taiwan University, Department of Agronomy, Taipei 10617, Taiwan.

{ddagger} To whom correspondence should be addressed. E-mail: sdt4{at}cornell.edu

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A candidate gene survey of quantitative trait loci affecting chemical composition in tomato fruit.
L. Bermudez, U. Urias, D. Milstein, L. Kamenetzky, R. Asis, A. R. Fernie, M. A. Van Sluys, F. Carrari, and M. Rossi (2008)
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Natural Variation in Arabidopsis lyrata Vernalization Requirement Conferred by a FRIGIDA Indel Polymorphism.
H. Kuittinen, A. Niittyvuopio, P. Rinne, and O. Savolainen (2008)
Mol. Biol. Evol. 25, 319-329
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Science. ISSN 0036-8075 (print), 1095-9203 (online)