True, John R Liu, Jianjun Stam, Lynn F Zeng, Zhao-Bang Laurie, Cathy C
Published in
Evolution; international journal of organic evolution
The sibling species Drosophila simulans and D. mauritiana differ significantly in a number of male secondary sexual traits, providing an ideal system for genetic analysis of interspecific morphological divergence. In the experiment reported here, F1 hybrids from a cross of two inbred lines were backcrossed in both directions and about 200 flies fro...
Papadopoulos, D Schneider, D Meier-Eiss, J Arber, W Lenski, R E Blot, M
Published in
Proceedings of the National Academy of Sciences of the United States of America
Molecular methods are used widely to measure genetic diversity within populations and determine relationships among species. However, it is difficult to observe genomic evolution in action because these dynamics are too slow in most organisms. To overcome this limitation, we sampled genomes from populations of Escherichia coli evolving in the labor...
Blattner, Frank R. Kadereit, Joachim W.
Published in
Plant Systematics and Evolution
Sequences of the ITS region of nrDNA were analyzed for the seven genera of Papaveraceae subf. Chelidonioideae s.str. Three major clades can be recognized. These are 1.Chelidonium/Hylomecon/Stylophorum, 2.Eomecon/Sanguinaria, and 3.Bocconia/Macleaya. The monophyly of genera in the first of these three clades is doubtful, and clades two and three are...
Hailong, Zhang Jun, Sun
Published in
Acta Mechanica Sinica
Micron-sized internal cracks were introduced into rounded bars of pure iron by low cycle fatigue, and the cracks had irregular penny-shaped morphology with the critical diameter of about 30μm and the thickness of 0.5–1.5μm. The initiation and propagation of the cracks were investigated quantitatively as well as their location and geometry. After va...
Shchennikova, A.V. Shulga, O.A. Immink, R. Skryabin, K.G. Angenent, G.C.
Four full-length MADS-box cDNAs from chrysanthemum, designated Chrysanthemum Dendrathema grandiflorum MADS (CDM) 8, CDM41, CDM111, and CDM44, have been isolated and further functionally characterized. Protein sequence alignment and expression patterns of the corresponding genes suggest that CDM8 and CDM41 belong to the FRUITFULL (FUL) clade, CDM111...
Claude, Julien Pritchard, Peter Tong, Hayan Paradis, Emmanuel Auffray, Jean-Christophe
Resource use and phylogeny are often correlated with morphological variation. Moreover, because biological shapes are often complex and evolve depending on several internal constraints, they must be assessed using integrative methods.We analyzed the morphological variation of the turtle skull in the context of an adaptive radiation. Our focus are t...
Vanderpoorten, Alain Jacquemart, A. L.
Evolutionary significance of morphological characters that have traditionally been used for species delineation in the aquatic moss genus Amblystegium was tested by partitioning the environmentally and genetically induced morphological variation and focusing on morphological evolution using comparative methods. Cultivation experiments under control...
Clarke, Julia A Zhou, Zhonghe Zhang, Fucheng
Published in
Journal of anatomy
In studies of the evolution of avian flight there has been a singular preoccupation with unravelling its origin. By contrast, the complex changes in morphology that occurred between the earliest form of avian flapping flight and the emergence of the flight capabilities of extant birds remain comparatively little explored. Any such work has been lim...
Bowman, J. L.
Published in
Plant Systematics and Evolution
For approximately 20 years Arabidopsis has been a model system to investigate developmental and physiological questions in plant biology, leading to the identification of genes and genetic systems involved in many processes. Extending ideas arising from knowledge of developmental genetic systems in Arabidopsis to other species of the Brassicaceae w...
Yang, Y.
Published in
Plant Systematics and Evolution
Female cone morphology in Ephedra, including the number of initiated ovules and mature seeds per cone, provides important taxonomic characters used in sectional or species delimitation within Ephedra. Recent molecular phylogenies have indicated, however, that seed number per cone has changed repeatedly during the evolution of the genus. This study ...
