[Molecular identification and the features of genetic diversity in interspecific hybrids of Amur sturgeon (Acipenser schrenckii x A. baerii, A. baerii x A. schrenckii, A. schrenckii x A. ruthenus, and A. ruthenus x A. schrenckii) based on variability of multilocus RAPD markers].
Identifieur interne : 000A44 ( Main/Merge ); précédent : 000A43; suivant : 000A45[Molecular identification and the features of genetic diversity in interspecific hybrids of Amur sturgeon (Acipenser schrenckii x A. baerii, A. baerii x A. schrenckii, A. schrenckii x A. ruthenus, and A. ruthenus x A. schrenckii) based on variability of multilocus RAPD markers].
Auteurs : K V Rozhkovan ; G N Chelomina ; E I RachekSource :
- Genetika [ 0016-6758 ] ; 2008.
English descriptors
- KwdEn :
- MESH :
- genetics : Chimera, Fishes.
- methods : Random Amplified Polymorphic DNA Technique.
- Animals, Phylogeny.
Abstract
The method of polymerase chain reaction with random primers (RAPD PCR) was used to identify the progeny of the crosses between three sturgeon species, Amur sturgeon (Acipenser schrenckii Brandt, 1869), Siberian sturgeon (A. baerii Brandt, 1869), and sterlet (A. ruthenus Linnaeus, 1758). Using ten primers, genetic variation in 70 yearlings, produced in seven individual crosses: Acipenser schrenckii x A. schrenckii, A. baerii x A. baerii, A. ruthenus x A. ruthenus, A. schrenckii x A. baerii, A. baerii x A. schrenckii, A. schrenckii x A. ruthenus, and A. ruthenus x A. schrenckii was described and evaluated. It was demonstrated that the samples composed of hybrids from individual crosses were more variable than the samples of parental species. On the other hand, pooled samples of hybrids from two cross directions were genetically less variable than the pooled samples of their parents. The three main features of the hybrid RAPD profiles identified included: (1) preservation of marker DNA fragments of both parents in one genome; (2) presence of specific DNA fragments, absent from both parents; and (3) dependence of the frequency of some DNA fragments from the cross direction. Multidimensional scaling clearly distinguishes in the space of three coordinates the individuals of original species and the hybrid progeny with differentiation in the groups of direct and backcross hybrids. Analysis of relationships (UPGMA and NJ) pointed to substantial differentiation between the species, as well as between the species and hybrid progeny. Close genetic relationships between direct and backcross hybrids were demonstrated. Multilocus RAPD markers in association with statistical methods are considered to be the useful tool for discrimination of interspecific hybrids of sturgeon. Possible reasons for the differences in the hybrid RAPD profiles are discussed.
PubMed: 19137727
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Using ten primers, genetic variation in 70 yearlings, produced in seven individual crosses: Acipenser schrenckii x A. schrenckii, A. baerii x A. baerii, A. ruthenus x A. ruthenus, A. schrenckii x A. baerii, A. baerii x A. schrenckii, A. schrenckii x A. ruthenus, and A. ruthenus x A. schrenckii was described and evaluated. It was demonstrated that the samples composed of hybrids from individual crosses were more variable than the samples of parental species. On the other hand, pooled samples of hybrids from two cross directions were genetically less variable than the pooled samples of their parents. The three main features of the hybrid RAPD profiles identified included: (1) preservation of marker DNA fragments of both parents in one genome; (2) presence of specific DNA fragments, absent from both parents; and (3) dependence of the frequency of some DNA fragments from the cross direction. Multidimensional scaling clearly distinguishes in the space of three coordinates the individuals of original species and the hybrid progeny with differentiation in the groups of direct and backcross hybrids. Analysis of relationships (UPGMA and NJ) pointed to substantial differentiation between the species, as well as between the species and hybrid progeny. Close genetic relationships between direct and backcross hybrids were demonstrated. Multilocus RAPD markers in association with statistical methods are considered to be the useful tool for discrimination of interspecific hybrids of sturgeon. Possible reasons for the differences in the hybrid RAPD profiles are discussed.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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