The Role of a Pseudo-Response Regulator Gene in Life Cycle Adaptation and Domestication of Beet.

Pin, P. A., Zhang, W. Y., Vogt, S. H., Dally, N., Buttner, B., Schulze-Buxloh, G., Jelly, N. S., Chia, T. Y. P., Mutasa-Gottgens, E. S., Dohm, J. C., Himmelbauer, H., Weisshaar, B., Kraus, J., Gielen, J. J. L., Lommel, M., Weyens, G., Wahl, B., Schechert, A., Nilsson, O., Jung, Christian, Kraft, T. and Muller, A. E. (2012) The Role of a Pseudo-Response Regulator Gene in Life Cycle Adaptation and Domestication of Beet. Current Biology, 22 (12). pp. 1095-1101. DOI 10.1016/j.cub.2012.04.007.

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Life cycle adaptation to latitudinal and seasonal variation in photoperiod and temperature is a major determinant of evolutionary success in flowering plants. Whereas the life cycle of the dicotyledonous model species Arabidopsis thaliana is controlled by two epistatic genes, FLOWERING LOCUS C and FRIGIDA [1-3], three unrelated loci (VERNALIZATION 1-3) determine the spring and winter habits of monocotyledonous plants such as temperate cereals [4-6]. In the core eudicot species Beta vulgaris, whose lineage diverged from that leading to Arabidopsis shortly after the monocot-dicot split 140 million years ago [7, 8], the bolting locus B [9] is a master switch distinguishing annuals from biennials. Here, we isolated B and show that the pseudo-response regulator gene BOLTING TIME CONTROL 1 (BvBTC1), through regulation of the FLOWERING LOCUS T genes [10], is absolutely necessary for flowering and mediates the response to both long days and vernalization. Our results suggest that domestication of beets involved the selection of a rare partial loss-of-function BvBTC1 allele that imparts reduced sensitivity to photoperiod that is restored by vernalization, thus conferring bienniality, and illustrate how evolutionary plasticity at a key regulatory point can enable new life cycle strategies.

Document Type: Article
Additional Information: Syngenta Seeds AB, S-26123 Landskrona, Sweden. Swedish Univ Agr Sci, Dept Forest Genet & Plant Physiol, Umea Plant Sci Ctr, S-90183 Umea, Sweden. Univ Kiel, Plant Breeding Inst, D-24098 Kiel, Germany. Rothamsted Res, Brooms Barn, Bury St Edmunds IP28 6NP, Suffolk, England. Max Planck Inst Mol Genet, D-14195 Berlin, Germany. Univ Pompeu Fabra, Ctr Genom Regulat, Barcelona 08003, Spain. Univ Bielefeld, Dept Biol, D-33594 Bielefeld, Germany. KWS SAAT AG, D-37555 Einbeck, Germany. Syngenta Seeds SAS, F-31790 St Sauveur, France. SESVanderHave NV, B-3300 Tienen, Belgium. Fr Strube Res GmbH & Co KG, D-38387 Solingen, Germany. Kraft, T (reprint author), Syngenta Seeds AB, S-26123 Landskrona, Sweden.;
Keywords: flowering time beta-vulgaris annual habit sugar-beet vernalization clock repressor wheat angiosperms protein
Research affiliation: Kiel University
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.cub.2012.04.007
ISSN: 0960-9822
Projects: Future Ocean
Date Deposited: 14 May 2014 09:43
Last Modified: 23 Sep 2019 22:50

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