Identification of interspecific hybrids by amplified fragment length polymorphism: the case of sturgeon

Congiu, Leonardo; Dupanloup, Isabelle; Patarnello, Tomaso; Fontana, Francesco; Rossi, R.; Arlati, G.; Zane, Lorenzo

doi:10.1046/j.0962-1083.2001.01368.x

Cited by 66 publications

(52 citation statements)

References 15 publications

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“…oculatum and P. wawranum (see Perrie 2001). This is expected in a hybrid scenario (e.g., an allopolyploid origin) with a dominant marker system such as AFLP (Liu et al 1998;Ayres & Strong 2001;Congiu et al 2001). Additive profiles are not expected for autopolyploid events.…”

Section: Allopolyploidy Of Polystichum Neozelandicummentioning

confidence: 99%

Evidence for an allopolyploid complex in New ZealandPolystichum(Dryopteridaceae)

Perrie¹,

Brownsey

Lockhart

et al. 2003

New Zealand Journal of Botany

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Evidence is provided for the first demonstrated example of allopolyploidy in the New Zealand fern flora. Cytological, morphological, and molecular (AFLP-DNA fingerprinting) analyses indicate that the fern previously known as Polystichum richardii constitutes an allopolyploid complex, in which four separate evolutionary lineages are present. These are here recognised as three taxonomic species, with one of these encompassing two subspecies. The two allooctoploid lineages are accommodated under the reinstated name P. neozelandicum, each as a separate subspecies: P. neozelandicum subsp. neozelandicum and the new combination P. neozelandicum subsp. zerophyllum. The new combination P. wawranum is made for one of the tetraploid lineages, while the name P. oculatum is reinstated for the other. Polystichum richardii is a later synonym of P. neozelandicum, and hence is not a legitimate name for any of the taxa recognised here.

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Section: Allopolyploidy Of Polystichum Neozelandicummentioning

confidence: 99%

Evidence for an allopolyploid complex in New ZealandPolystichum(Dryopteridaceae)

Perrie¹,

Brownsey

Lockhart

et al. 2003

New Zealand Journal of Botany

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“…Identification of hybrid individuals is often a necessary first step in the implementation of management strategies, such as breeding or translocation programs for threatened species, [42,43], and the standard AT has been applied to this problem [44]. A hypothetical hybrid taxon is created by combining randomly sampled alleles from the two parental taxa, and each individual is then assigned to one of three potential sources (two parental taxa and the hybrid taxon).…”

Section: Hybridizationmentioning

confidence: 99%

Assignment methods: matching biological questions with appropriate techniques

Manel

Gaggiotti

Waples

2005

Trends in Ecology & Evolution

651

689

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Times Cited: 83International audienceAssignment methods, which use genetic information to ascertain population membership of individuals or groups of individuals, have been used in recent years to study a wide range of evolutionary and ecological processes. In applied studies, the first step of articulating the biological question(s) to be addressed should be followed by selection of the method(s) best suited for the analysis. However, this first step often receives less attention than it should, and the recent proliferation of assignment methods has made the selection step challenging. Here, we review assignment methods and discuss how to match the appropriate methods with the underlying biological questions for several common problems in ecology and conservation (assessing population structure; measuring dispersal and hybridization; and forensics and mixture analysis). We also identify several topics for future research that should ensure that this field remains dynamic and productive

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“…The striped bass (Morone saxatilis), the sister genus of Dicentrarchus, when exposed to a standardised confinement stress, had lower survival and resistance to infection than hybrid bass (M. saxatilis × M. chrysops and M. saxatilis × M. americana) (Noga et al 1994). A significant proportion of farmed sturgeon is composed of interspecific hybrids (Acipenser naccarii × A. transmontanus) due to their high productive performance for caviar and flesh (Congiu et al 2001). Finally, another well-known example of the semi-intensive culture of hybrid fish is the red Nile tilapia, which is a hybrid of Oreochromis niloticus and O. mossambicus (Medeiros et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Fitness of early life stages in F1 interspecific hybrids between Dicentrarchus labrax and D. punctatus

Vergnet

Molinari

et al. 2012

Aquat. Living Resour.

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-Inter-and intraspecific crossbreeding experiments were conducted to evaluate the aquaculture potential of hybrids in the genus Dicentrarchus, focusing on fertilisation and hatching success. The experimental design consisted of 24 controlled crosses in which individual and pooled fertilisations were made between wild D. labrax individuals (8 dams and 5 sires originating from West Mediterranean and Atlantic populations) and wild D. punctatus (6 sires). Three experiments were successively performed: (1) dams from the Mediterranean population, individually considered to have good egg quality, (2) dams from Mediterranean population, individually considered to have poor egg quality and (3) crossbreeding using pooled eggs from the Atlantic population. In each case, batches of these eggs were fertilized by sperm from males of the two species. Sperm cell quality (concentration and motility) was verified before experimentation in all cases and equal numbers of sperm cells from each male were used to individually (without inter-sire competition) fertilise egg batches. Through the repeated artificial crosses between female common sea bass Dicentrarchus labrax (Linnaeus 1758) and male spotted sea bass D. punctatus (Block 1792), these experiments showed that no post-zygotic reproductive barriers exist to interspecific hybridisation between these two species when using D. labrax as dams and D. punctatus as sires. Phenotypically, the F1 hybrids were easily recognisable: they inherited the characteristic black spots of D. punctatus. Furthermore, embryo survival was significantly higher in interspecific crosses compared with intraspecific controls, showing increased fitness for this trait (increased performance at early life stage). Then, the experimental breeding design validates the observation that West Mediterranean and Atlantic common sea bass populations are different. Indeed, the inter-population crosses (between West Mediterranean dams and Atlantic sires) also revealed increased fitness at early life stages in comparison with the progeny of intra-Atlantic population crosses. However, these individuals were still smaller than their interspecific counterparts. The ability to produce viable F1 hybrids will have significant implications for the practical improvement of sea bass aquaculture.

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Identification of interspecific hybrids by amplified fragment length polymorphism: the case of sturgeon

Cited by 66 publications

References 15 publications

Evidence for an allopolyploid complex in New ZealandPolystichum(Dryopteridaceae)

Evidence for an allopolyploid complex in New ZealandPolystichum(Dryopteridaceae)

Assignment methods: matching biological questions with appropriate techniques

Fitness of early life stages in F1 interspecific hybrids between Dicentrarchus labrax and D. punctatus

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