Journal
MECHANISMS OF DEVELOPMENT
Volume 99, Issue 1-2, Pages 71-82Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0925-4773(00)00481-0
Keywords
somite; vertebra; rib; resegmentation; chick-quail chimera; rostrocaudal axis; fate
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To determine whether resegmentation of somites forms the axial skeleton, we traced the development of the rostral and the caudal half of a somite during skeletogenesis in chick-quail chimeras by replacing the rostral or caudal half of a newly formed chick somite with that of a quail somite. The rostral half-somite transplant formed the caudal half of the vertebral body, the entire spinous process and the distal rib, while the caudal half-somite transplant formed the rostral half of vertebral body, the rostral half of spinous process, the vertebral arch, the transverse process and the entire rib. These findings confirm the resegmentation theory except the spinous process and the distal rib. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
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