Abstract
Distant hybridization refers to crosses between two different species or higher-ranking taxa that enables interspecific genome transfer and leads to changes in phenotypes and genotypes of the resulting progeny. If progeny derived from distant hybridization are bisexual and fertile, they can form a hybrid lineage through self-mating, with major implications for evolutionary biology, genetics, and breeding. Here, we review and summarize the published literature, and present our results on fish distant hybridization. Relevant problems involving distant hybridization between orders, families, subfamilies, genera, and species of animals are introduced and discussed, with an additional focus on fish distant hybrid lineages, genetic variation, patterns, and applications. Our review serves as a useful reference for evolutionary biology research and animal genetic breeding.
Highlights
Distant hybridization refers to crosses between two different species or higher-ranking taxa that enables interspecific genome transfer and leads to changes in phenotypes and genotypes of the resulting progeny
Our review serves as a useful reference for evolutionary biology research and animal genetic breeding
We focus on fish distant hybridization, including fertile lineage formation and genetic variation, underlying mechanisms, and practical applications
Summary
Examples of hybridization between different phyla include separate crosses of the sea urchin Anthocidaris crassispina (♀) of Echinodermata with mollusks Acmaea nanshaensis (♂) and Mytilus edulis (♂) and the annelid Nereis succinea (♂). Larvae of all three hybrids are similar to those of Anthocidaris crassispina. Sperm from the male parent is introduced into the egg, distant male and female nuclear fusion is difficult. Because the male chromosomes are eventually degraded, they are not incorporated into the generation’s nuclei. The hybrid larvae resemble the larvae of Anthocidaris crassispina, the maternal parent [10]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have