文章基本信息

标题：Transgenic study of parallelism in plant morphological evolution
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作者：Ho-Sung Yoon ; David A. Baum
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2004
卷号：101
期号：17
页码：6524-6529
DOI：10.1073/pnas.0401824101
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Developmental constraint is indicated when one finds that similar genetic mechanisms are responsible for independent origins of the same derived phenotype. We studied three independent origins of rosette flowering within the mustard family and attempted to evaluate the extent to which the same mechanisms were involved in each transition from the ancestral phenotype, inflorescence flowering. We used transformation to move a candidate gene, LFY, and its cis-regulatory sequences from rosette-flowering species into an inflorescence-flowering recipient, Arabidopsis thaliana, in place of its endogenous LFY gene. The transgenic phenotypes of experimental and control lines (containing an A. thaliana LFY transgene) and the expression driven by the cis-regulatory sequences show that changes at the LFY locus might have contributed to the evolution of rosette flowering in two of the three lineages. In the third case, changes upstream of LFY are implicated. Our data suggest that changes in a single developmental regulatory program were involved in multiple origins of the same derived trait but that the specific genetic changes were different in each case.