Contrasting ecological niches lead to great postzygotic ecological isolation: a case of hybridization between carnivorous and herbivorous cyprinid fishes.

Background: Postzygote isolation is an important part of species isolation, especially for fish, and it can be divided into two aspects: genetic isolation and ecological isolation. With the increase in parental genetic distance, the intensity of genetic isolation between them also increases. Will the increase in parental ecological niche differences also lead to the increase in ecological isolation intensity between them? This question is difficult to answer based on the current literature due to the lack of hybridization cases of contrasting ecological niche parents.

The complete mitochondrial genome sequence of .

Tchang (1930) is an endemic species in China, which is mainly distributed in the Jialing River and its tributaries. In this study, the complete mitochondrial genome was sequenced. Its length is 16,619 bp, containing 22 tRNAs, 2 rRNAs, and 13 protein-coding genes (PCGs).