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Title [sv]
Betydelsen av allelisk variation för homoploid artbildning hos växter
Title [en]
Importance of allelic variation in homoploid hybrid speciation in plants
Abstract [sv]
Hybridization is an important force in plant evolution. It can quickly create evolutionary novelties that promote adaptation and speciation. Allelic variation and interactions in hybrids are hypothesized to be components for heterotic phenotypes. This is particularly relevant for diploid hybrids since coordination between alleles is needed after the fusion of two divergent genomes to create a new biological unit. Functional allelic variation in higher plants is, however, still an unexplored research field. In this project we utilize a unique species complex and gene families that play important roles in stress tolerance to address fundamental questions in homoploid hybrid speciation and ecological innovation. Pinus densata is a hybrid pine adapted on Tibetan Plateau where either of the parental taxa can survive. The origin of P. densata dates back to the uplift of the plateau 8-10 mln years ago. Its ancient history and unique adaptation offer a rare opportunity to study the genetic basis of speciation. Natural populations of the ancient hybrid, of the species boundaries and man-made F1 hybrids will be used in a comparative analysis. By combining population genetic approach with molecular functional study, we explore the tempo and mode of hybrid speciation. Results from this project are directly relevant to understanding the patterns of gene evolution, the relationship between genetic variation and ecological diversification, and ultimately the origin of species.
Principal InvestigatorWang, Xiao-Ru
Coordinating organisation
Umeå University
Funder
Period
2009-01-01 － 2011-12-31
Identifiers
DiVA, id: project:897Project, id: 2008-05709_VR

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