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Fiber Evolution

Introgression Populations
Homoeolog-specific Profiling
Genetic Networks & Phenotype
Effects of Selection
Sequence Capture

Genetic and Physical mapping resources
Comparative BAC Sequencing
Genome Sequence Resources
EST D-genome map
EST Resources

Web Database
Education and Outreach
Significance for cotton industry
Cotton Literature
Cotton Links
Wendel Lab
PGML (Paterson Lab)
Udall Lab

Lists & protocols
How to
CEGC Site Search

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Fiber Development

Developmental profiles of the fibers of most wild species are similar, with fiber elongation terminating at about two weeks post-anthesis. In contrast, growth is extended to three weeks in the A-genome and F-genome diploids. When considered in light of the phylogeny of the genus, it becomes clear that this prolonged elongation period represents a key evolutionary event in the origin of long fiber, and that it happened in the common ancestor of these two groups of diploid cottons prior to domestication and in Africa. Analysis of fiber growth curves reveals that domestication itself has been associated with further prolongation of elongation at both the diploid and allopolyploid levels. This provokes the speculation that the effects of parallel artificial selection for long fiber in the four cultivated species resulted in a genetically convergent or parallel transformation in the developmental program responsible for this aspect of fiber development.

Fiber development
Natural and human-induced variation
Extraordinary variation among species

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