Genetics of Complex Traits
Genetic dissection of a major anthocyanin QTL contributing to pollinator-mediated reproductive isolation between sister species of Mimulus, pp. 255-263
Y.-W. Yuan, J. M. Sagawa, R. C. Young, B. J. Christensen, and H. D. Bradshaw Jr.
What underlies prezygotic barriers that lead to reproductive isolation, and ultimately, to speciation? The bumblebee-pollinated Mimulus lewisii and hummingbird-pollinated M. cardinalis are a classic example of pollinator-mediated prezygotic reproductive isolation. These investigators identified an anthocyanin pigment regulatory gene causing a flower color difference that contributes to pollinator preference for each species. This gene is likely to play a role in flower color variation in many other plants.
The nuclear Argonaute NRDE-3 contributes to transitive RNAi in Caenorhabditis elegans, pp. 117-131
J. J. Zhuang, S. A. Banse, and C. P. Hunter
RNA interference (RNAi) was initially perceived as a cytoplasmic gene silencing process, but genes important for RNAi in C. elegans were found to operate in the nucleus. This article describes unexpected features of one such gene underlying a nuclear RNAi defective (nrde) mutant, which emphasizes the importance of nuclear events during RNAi silencing, especially for transitive RNAia mechanism central to RNAi amplification.
|Contact: Phyllis Edelman|
Genetics Society of America