Lumbricid earthworms Eisenia andrei (Ea) and E. fetida (Ef) are simultaneous hermaphrodites with reciprocal insemination capable of self-fertilization while the existence of hybridization of these two species was still debatable. During the present investigation fertile hybrids of Ea and Ef were detected. Virgin specimens of Ea and Ef were laboratory crossed (Ea+Ef) and their progeny was doubly...

The race 65 of Colletotrichum lindemuthianum, etiologic agent of anthracnose in common bean, is distributed worldwide, having great importance in breeding programs for anthracnose resistance. Several resistance alleles have been identified promoting resistance to this race. However, the variability that has been detected within race has made it difficult to obtain cultivars with durable resista...

The formation of new species is often a consequence of genetic incompatibilities accumulated between populations during allopatric divergence. When divergent taxa interbreed, these incompatibilities impact physiology and have a direct cost resulting in reduced hybrid fitness. Recent surveys of gene regulation in interspecific hybrids have revealed anomalous expression across large proportions o...

Compensatory growth (CG) is a means by which organisms can increase their growth rate above their routine growth rate after a period of environmentally induced growth depression. Despite a focus on the implications of CG for aquaculture, little research has evaluated the effect of domesticated-wild hybridization on CG. Any deviation in the mean compensatory ability of hybrids relative to their ...

Aerobic respiration is a fundamental physiological trait dependent on coordinated interactions between gene products of the mitochondrial and nuclear genomes. Mitonuclear mismatch in interspecific hybrids may contribute to reproductive isolation by inducing reduced viability (or even complete inviability) due to increased metabolic costs. However, few studies have tested for effects of mitonucl...

As wild boars (Sus scrofa L.) are progenitors of pigs (Sus domesticus), they can copulate reciprocally and give prolific progeny. However, wild boar and pig not only have different appearance, but also different biological features. In 2004 – 2008, in stockyard located in Telšiai district (Lithuania), two groups of investigated animals were formed: I – Lithuanian Whites copulated with a wild bo...

Solidago × niederederi (Asteraceae) is a natural hybrid of the native S. virgaurea and alien invasive canadensis, originated in Europe. Its naturalisation potential still questionable. One largest (more than 20 ramet clusters, treated as individuals) known population this nothospecies, located «Aleksin Bor» Natural Monument (Aleksin town, Tula Region, Russia) floodplain River Oka. We studied it...