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Studies on fish heterosis with DNA fingerprinting

文献类型: 外文期刊

作者: Wang, J 1 ; Xia, D 2 ;

作者机构: 1.Nanjing Normal Univ, Inst Fisheries Sci, Coll Life Sci, Nanjing 210097, Peoples R China

2.Chinese Acad Fisheries Sci, Freshwater Fisheries Res Ctr, Wuxi, Peoples R China

关键词: Heterosis;Dna fingerprinting;Tilapia;Carp;Fragment-length-polymorphisms;Maize inbreds;Breeding programs;Genetic diversity;Salmonid fishes;Striped bass;Tilapia;Probe;Populations;Markers

期刊名称:AQUACULTURE RESEARCH ( 影响因子:2.082; 五年影响因子:2.415 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: One Tilapia hybridization, Oreochromis aureus , (Steindachner) male x Oreochromis niloticus , (Linnaeus) female, and two common carp, Cyprinus carpio , (Linnaeus) male, hybridizations, Russian mirror carp male x Xingguo red carp female, and German mirror carp male x Xingguo red carp female were used to study the feasibility of predicting heterosis using genetic distance from DNA fingerprinting. The results indicated that highly polymorphic DNA fingerprints could be obtained with human minisatellite 33.6 as a probe on the studied varieties. The within-population similarity indices of O. aureus , O. niloticus , Russian mirror carp, German mirror carp and Xingguo red carp were 0.785, 0.577, 0.432, 0.348 and 0.339 respectively. The similarity indices between F1 and their parents of three hybridization combinations were not significantly different (P > 0.05). There were larger genetic distances between two hybridization combinations, O. aureus male x O. niloticus female and Russian mirror carp male x Xingguo red carp female, which showed heterosis in production and were extensively used in Chinese aquaculture. The genetic distance between O. aureus male and O. niloticus female was 0.338, and that between Russian mirror carp and Xingguo red carp was 0.344. However, the genetic distance between German mirror carp and Xingguo red carp was 0.129; this corresponded with the fact that their F1 generation did not show heterosis in the Chinese fish hybridization experiment. The study suggested that genetic distance could be used to predict fish heterosis.

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