Butterfly study reveals traits and genes associated with establishment of new populations
A team of scientists has discovered that descendants of 'exploratory' butterflies that colonised new habitats differ genetically from their more cautious cousins. The team, led by James Marden, a professor of biology at Penn State University, and Christopher Wheat, a post-doctoral scholar working at both Penn State and the University of Helsinki, has revealed some of the genetic bases for faster egg maturation, a higher rate of energy metabolism, and superior flight ability - traits that provide an advantage to butterflies that stray from familiar territory to found new populations in previously unoccupied habitat patches. The results have potentially broad importance because they show how natural selection may act in species that occupy spatially distinct habitat patches. This research will be published in the print edition of the journal Molecular Ecology in May, and is available in early-online form...
