Polymorphism of the LEAFY Gene in Brassica Plants

Polymorphism of the LEAFY Gene in Brassica Plants The arabidopsis gene LEAFY controls the induction of flowering and maintenance of the floral meristem identity. By comparing the primary structure of LEAFY and its homologs in other Brassicaceae species and beyond this family, we singled out four clusters corresponding to three systematically remote families of angiosperms, Brassicaceae, Solanaceae, and Poaceae, and to gymnosperms. Both structural and functional distinctions of LEAFY homologs from their arabidopsis prototype expanded in the range Brassicaceae—Solanaceae—Poaceae. A LEAFY homolog from B. juncea cloned in our laboratory was used as a hybridization probe to analyze the restriction fragment length polymorphism in six Brassica species comprising diploid (AA, BB, and CC) and allotetraploid (AABB, AACC, and BBCC) genomes. In this way we recognized LEAFY fragments specific of genomes A, B, and C; in contrast, the variations of the length and structure of the LEAFY intron 2 were not genome-specific. LEAFY polymorphism in the Brassica accessions comprising genome B was related to their geographic origin and apparently to the adaptation to day length. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Polymorphism of the LEAFY Gene in Brassica Plants

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Copyright © 2005 by MAIK "Nauka/Interperiodica"
Life Sciences; Plant Sciences; Plant Physiology
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