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A new type of homodiploid fish derived from the interspecific hybridization of female common carp × male blunt snout bream.
Scientific Reports ( IF 3.8 ) Pub Date : 2017-06-23 , DOI: 10.1038/s41598-017-04582-z
Shi Wang , Xiaolan Ye , Yude Wang , Yuting Chen , Bowen Lin , Zhenfeng Yi , Zhuangwen Mao , Fangzhou Hu , Rurong Zhao , Juan Wang , Rong Zhou , Li Ren , Zhanzhou Yao , Min Tao , Chun Zhang , Jun Xiao , Qinbo Qin , Shaojun Liu

It is commonly believed that hybridization might lead to the formation of new polyploidy species, but it is unclear whether hybridization can produce a new homodiploid species. Here, we report the spontaneous occurrence of a new crucian carp-like homodiploid fish (2n = 100) that originated from the interspecific hybridization of female common carp (Cyprinus carpio, Cyprininae, 2n = 100) × male blunt snout bream (Megalobrama amblycephala, Cultrinae, 2n = 48). The phenotype and reproductive traits of this new crucian carp-like homodiploid fish were found to be very similar to those of the existing diploid species (diploid crucian carp; Carassius auratus). FISH and 5S rDNA analyses revealed that the genotype of the crucian carp-like homodiploid fish differs from those of its parents but is closely related to that of diploid crucian carp. The results provide evidence of the existence of a possible route through which the distant hybridization of this cross can generate crucian carp. The new type of homodiploid fish is of great value in fish genetic breeding and for studying the early evolutionary process.

中文翻译:

一种从雌性普通鲤鱼×雄性钝嘴鲷种间杂交获得的新型同二倍体鱼类。

通常认为杂交可能导致新的多倍体物种的形成,但是尚不清楚杂交是否可以产生新的同二倍体物种。在这里,我们报告了一条新的cru鱼状同二倍体鱼(2n = 100)的自发发生,该鱼起源于雌性鲤鱼(Cyprinus carpio,Cyprininae,2n = 100)×雄性钝嘴鲷(Megalobrama amblycephala, Cultrinae,2n = 48)。发现这种新的cru鱼状同二倍体鱼的表型和繁殖性状与现有的二倍体物种(二倍体cru鱼; Car鱼)非常相似。FISH和5S rDNA分析表明,the鱼状同二倍体鱼的基因型与其亲本不同,但与二倍体cru鱼密切相关。结果提供了存在可能的途径的证据,该杂交途径的远距离杂交可以通过该途径产生cru鱼。新型同二倍体鱼类在鱼类遗传育种和研究早期进化过程中具有重要价值。
更新日期:2017-06-26
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