THE GENERATION OF THE FERTILE DIPLOID AND TETRAPLOID FISH LINAGES DERIVED FROM DISTANT HYBRIDIZATION

We take long term investigation to focus on the fish distant hybridization between two parents belonging to different species or genus or subfamily which leads to different ploidy fishes including diploids, triploids and tetraploids. The formation of the different ploidy fishes is related to the equal or unequal of chromosomal number of the parents. There are two types of the fertile diploids. One is the autodiploid fish with two sets of chromosomes from the female parent with the insert DNA fragment from the male parent. The other one is the allodiploid fish with two sets of chromosomes, each one from the female parent and the male parent. There are two types of the fertile tetraploids. One is the autotetraploid fish with four sets of chromosomes from the female parent with the insert DNA fragment from the male parent. The other one is the allotetraploid fish with four sets of chromosomes, each two from the female parent and the male parent. The establishment of the fertile diploid and tetraploid linages is useful both in fish genetic breeding and fish evolutionary biology.

Keywords: distant hybridization, diploid, tetraploid, triploid, linage, genetic breeding, evolution