Inversion polymorphisms in Trimerotropis pallidipennis (Orthoptera): clinal variation along an altitudinal gradient

Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera).

Grasshoppers have been much less studied than Drosophila when it comes to inversion polymorphisms, despite the occurrence of this rearrangement in several species of grasshoppers. In the present study, 354 males from a natural population of the New World species Trimerotropis pallidipennis, polymorphic for 6 pericentric inversions in 4 chromosome pairs, were sampled at the beginning and at the ...

Effects of Temperature on Behavior of Trimerotropis Pallidipennis (orthoptera, Acrididae)

We observed activity and behavior of Trimerotropis pallidipennis in the field and constructed time-activity budgets during June–July 2003. Grasshoppers began to walk once site temperatures (shaded air temperature 1 cm above soil surface) reached 18.6uC, foraging began once temperatures reached 24.2–31.7uC, and courtship began once temperatures reached 30.3–36.4uC. Mating and oviposition occurre...

Phenotypic Variation Inmorus Alba L. along Altitudinal Gradient

Transcriptomic variation and plasticity in rufous-collared sparrows (Zonotrichia capensis) along an altitudinal gradient.

As modern genomic tools are developed for ecologically compelling models, field manipulation experiments will become important for establishing the role of functional genomic variation in physiological acclimation and evolutionary adaptation along environmental clines. High-altitude habitats expose individuals to hypoxic and thermal stress, necessitating physiological acclimation, which may res...

Gene regulatory variation mediates flowering responses to vernalization along an altitudinal gradient in Arabidopsis.

Steep environmental gradients provide ideal settings for studies of potentially adaptive phenotypic and genetic variation in plants. The accurate timing of flowering is crucial for reproductive success and is regulated by several pathways, including the vernalization pathway. Among the numerous genes known to enable flowering in response to vernalization, the most prominent is FLOWERING LOCUS C...