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Conservation of Arabidopsis flowering genes in model legumes


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Hecht, VFG, Foucher, F, Ferrandiz, C, Macknight, R, Navarro, C, Morin, J, Vardy, ME, Ellis, N, Beltran, JP, Rameau, C and Weller, JL 2005 , 'Conservation of Arabidopsis flowering genes in model legumes' , Plant Physiology, vol. 137 , pp. 1420-1434 , doi: 10.1104/pp.104.057018.

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The model plants Arabidopsis (Arabidopsis thaliana) and rice (Oryza sativa) have provided a wealth of information about genes
and genetic pathways controlling the flowering process, but little is known about the corresponding pathways in legumes. The
garden pea (Pisum sativum) has been used for several decades as a model system for physiological genetics of flowering, but the
lack of molecular information about pea flowering genes has prevented direct comparison with other systems. To address this
problem, we have searched expressed sequence tag and genome sequence databases to identify flowering-gene-related
sequences from Medicago truncatula, soybean (Glycine max), and Lotus japonicus, and isolated corresponding sequences from pea
by degenerate-primer polymerase chain reaction and library screening. We found that the majority of Arabidopsis flowering
genes are represented in pea and in legume sequence databases, although several gene families, including the MADS-box,
CONSTANS, and FLOWERING LOCUS T/TERMINAL FLOWER1 families, appear to have undergone differential expansion,
and several important Arabidopsis genes, including FRIGIDA and members of the FLOWERING LOCUS C clade, are conspicuously
absent. In several cases, pea and Medicago orthologs are shown to map to conserved map positions, emphasizing
the closely syntenic relationship between these two species. These results demonstrate the potential benefit of parallel
model systems for an understanding of flowering phenology in crop and model legume species

Item Type: Article
Authors/Creators:Hecht, VFG and Foucher, F and Ferrandiz, C and Macknight, R and Navarro, C and Morin, J and Vardy, ME and Ellis, N and Beltran, JP and Rameau, C and Weller, JL
Journal or Publication Title: Plant Physiology
DOI / ID Number: 10.1104/pp.104.057018
Additional Information:

© 2005 American Society of Plant Biologists.

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