Gene flow: monitoring, modeling and mitigation

Abstract Over two decades later, gene flow research as it pertains to genetically engineered crops is still going strong, even in the face of the absence of ecological disasters in the nearly 30 years of widescale biotech crop commercialization. Nonetheless, ecological timeframes are within the study scope of the sort of research performed to date covered in this book. These studies have greatly informed regulations that govern biotech crops. The chapters in this book capture various aspects of scientific disciplines that span from organismal studies, to population and community ecology, to molecular biology.

The Auk ◽  
2019 ◽  
Vol 136 (4) ◽  
Author(s):  
Catalina Palacios ◽  
Silvana García-R ◽  
Juan Luis Parra ◽  
Andrés M Cuervo ◽  
F Gary Stiles ◽  
...  

Abstract Ecological speciation can proceed despite genetic interchange when selection counteracts the homogenizing effects of migration. We tested predictions of this divergence-with-gene-flow model in Coeligena helianthea and C. bonapartei, 2 parapatric Andean hummingbirds with marked plumage divergence. We sequenced putatively neutral markers (mitochondrial DNA [mtDNA] and nuclear ultraconserved elements [UCEs]) to examine genetic structure and gene flow, and a candidate gene (MC1R) to assess its role underlying divergence in coloration. We also tested the prediction of Gloger’s rule that darker forms occur in more humid environments, and examined morphological variation to assess adaptive mechanisms potentially promoting divergence. Genetic differentiation between species was low in both ND2 and UCEs. Coalescent estimates of migration were consistent with divergence with gene flow, but we cannot reject incomplete lineage sorting reflecting recent speciation as an explanation for patterns of genetic variation. MC1R variation was unrelated to phenotypic differences. Species did not differ in macroclimatic niches but were distinct in morphology. Although we reject adaptation to variation in macroclimatic conditions as a cause of divergence, speciation may have occurred in the face of gene flow driven by other ecological pressures or by sexual selection. Marked phenotypic divergence with no neutral genetic differentiation is remarkable for Neotropical birds, and makes C. helianthea and C. bonapartei an appropriate system in which to search for the genetic basis of species differences employing genomics.


2013 ◽  
Vol 85 (8) ◽  
pp. 1725-1758 ◽  
Author(s):  
Derek R. Buckle ◽  
Paul W. Erhardt ◽  
C. Robin Ganellin ◽  
Toshi Kobayashi ◽  
Thomas J. Perun ◽  
...  

The evolution that has taken place in medicinal chemistry practice as a result of major advances in genomics and molecular biology arising from the Human Genome Project has carried with it an extensive additional working vocabulary that has become both integrated and essential terminology for the medicinal chemist. Some of this augmented terminology has been adopted from the many related and interlocked scientific disciplines with which the modern medicinal chemist must be conversant, but many other terms have been introduced to define new concepts and ideas as they have arisen. In this supplementary Glossary, we have attempted to collate and define many of the additional terms that are now considered to be essential components of the medicinal chemist’s expanded repertoire.


2013 ◽  
Vol 18 (6) ◽  
pp. 312-324 ◽  
Author(s):  
Gemma Masip ◽  
Maite Sabalza ◽  
Eduard Pérez-Massot ◽  
Raviraj Banakar ◽  
David Cebrian ◽  
...  

2002 ◽  
Vol 21 (sup3) ◽  
pp. 199S-204S ◽  
Author(s):  
Robert Sévenier ◽  
Ingrid M. van der Meer ◽  
Raoul Bino ◽  
Andries J. Koops

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e75291 ◽  
Author(s):  
Ralph Scorza ◽  
Alissa B. Kriss ◽  
Ann M. Callahan ◽  
Kevin Webb ◽  
Mark Demuth ◽  
...  

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