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Título: | Regulatory Genes Control a Key Morphological and Ecological Trait Transferred Between Species |
Autor: | Kim, Minsung; Cui, Min-Long; Cubas Domínguez, Pilar; Gillies, Amanda; Lee, Karen; Chapman, Mark A.; Abbott, Richard J.; Coen, Enrico | Palabras clave: | Senecio squalidus Senecio vulgaris Flower-head development Natural polymorphism Hybridization Gene introgression Morphological traits Recombination Preservation |
Fecha de publicación: | 14-nov-2008 | Editor: | American Association for the Advancement of Science | Citación: | Science 322(5904): 1116-1119 (2008) | Resumen: | Hybridization between species can lead to introgression of genes from one species to another, providing a potential mechanism for preserving and recombining key traits during evolution. To determine the molecular basis of such transfers, we analyzed a natural polymorphism for flower-head development in Senecio. We show that the polymorphism arose by introgression of a cluster of regulatory genes, the RAY locus, from the diploid species S. squalidus into the tetraploid S. vulgaris. The RAY genes are expressed in the peripheral regions of the inflorescence meristem, where they promote flower asymmetry and lead to an increase in the rate of outcrossing. Our results highlight how key morphological and ecological traits controlled by regulatory genes may be gained, lost, and regained during evolution. | Descripción: | 4 pages, 4 figures.-- Supporting material available at Science Online: Materials and Methods, Fig. S1 [Sequence alignment of RAY1 and RAY2 coding regions], Table S1 [Haplotypes and accessions] & References (7 pages).-- GenBank accession numbers for RAY1 and RAY2 are FJ356698 to FJ356704. | Versión del editor: | http://dx.doi.org/10.1126/science.1164371 | URI: | http://hdl.handle.net/10261/8563 | DOI: | 10.1126/science.1164371 | ISSN: | 0036-8075 |
Aparece en las colecciones: | (CNB) Artículos |
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