Spatial variation in natural selection may play an important role in determining the genetic structure of hybridizing populations. Previous studies have found that F 1 hybrids between naturally hybridizing Ipomopsis aggregata and Ipomopsis tenuituba in central Colorado differ in fitness depending on both genotype and environment: hybrids had higher survival when I. aggregata was the maternal parent, except in the centre of the...

In this study, the possible influence of temperature on infectious pancreatic necrosis virus (IPNV)‐induced apoptosis in a zebrafish liver epithelium (ZLE) cell line was investigated. At a lower temperature (18 °C), there was expression of viral proteins VP2 and VP3 at 4 h post‐infection (p.i.). At this time no expression was found in the high temperature group at 28 °C. The cell survival ratio was 52 and 18% at 24 and 48 h p....