| tracking a heterosis effect in the field: tadpole resistance to parasites in the water frog hybridogenetic complex. | depending on the extent of evolutionary divergence among parent taxa, hybrids may suffer from a breakdown of co-adapted genes or may conversely exhibit vigour due to the heterosis effect, which confers advantages to increased genetic diversity. that last mechanism could explain the success of hybrids when hybridization zones are large and long lasting, such as in the water frog hybridization complex. in this hybridogenetic system, hybrid individuals exhibit full heterozygosity that makes it poss ... | 2009 | 19549350 |