Genetic evidence for hybridisation between Haliotis rubra and H. laevigata

Brown, L. D.

doi:10.1007/bf00350327

Cited by 29 publications

(21 citation statements)

References 11 publications

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“…The commercial cultured abalone industry in Australia has taken advantage of the sympatric relationship between H. rubra and H. laevigata, which results in a naturally occurring fertile interspecific hybrid (Hanh ; Brown & Murray ; Brown ) as a means to diversify the industry and design new products to satisfy market demands. Producers are also using genetic improvement programmes to further improve growth rates as well as provide strains with increased disease resistance, higher survival, better food conversion ratios, increased marketability, better meat yield, higher fecundity with age, altered age to maturity, sterility, potential for single sex and enhanced pearl production (Elliott ).…”

Section: Karyotype Comparison Among H Rubra H Laevigata and The Inmentioning

confidence: 99%

Karyotype comparison betweenHaliotis rubra,H. laevigataand the interspecific hybrid

Botwright

2013

Aquac Res

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Section: Karyotype Comparison Among H Rubra H Laevigata and The Inmentioning

confidence: 99%

Karyotype comparison betweenHaliotis rubra,H. laevigataand the interspecific hybrid

Botwright

2013

Aquac Res

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“…Molecular genetic techniques are ideally suited for its detection (see Rieseberg & Linder, 1999 for a critical evaluation), and a number of marine examples are available (e.g. Liu et al, 1991;Bert & Arnold, 1995;Brown, 1995;Bert et al, 1996;Gardner, 1996;Lessios & Pearse, 1996;Foltz, 1997;Röhner et al, 1997;Quesada et al, 1998;Väinölä & Vainio, 1998;Comesaña et al, 1999). Although only 3 of the 108 cases summarized by Gardner (1997) employed genetic methods, he concludes that (1) rates of hybridization in the sea and on land are roughly comparable, and that (2) in the sea, sporadic hybridization is more common than either well-defined hybrid zones between distinct, allopatric taxa or hybrid swarms.…”

Section: A Brief Taxonomy Of Species Concepts and How They Apply To Mmentioning

confidence: 99%

Molecular genetic analyses of species boundaries in the sea

2000

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The tools of molecular genetics have enormous potential for clarifying the nature and age of species boundaries in marine organisms. Below I summarize the genetic implications of various species concepts, and review the results of recent molecular genetic analyses of species boundaries in marine microbes, plants, invertebrates and vertebrates. Excessive lumping, rather than excessive splitting, characterizes the current systematic situation in many groups. Morphologically similar species are often quite distinct genetically, suggesting that conservative systematic traditions or morphological stasis may be involved. Some reproductively isolated taxa exhibit only small levels of genetic differentiation, however. In these cases, large population sizes, slow rates of molecular evolution, and relatively recent origins may contribute to the difficulty in finding fixed genetic markers associated with barriers to gene exchange. The extent to which hybridization blurs species boundaries of marine organisms remains a subject of real disagreement in some groups (e.g. corals). The ages of recently diverged species are largely unknown; many appear to be older than 3 million years, but snails and fishes provide several examples of more recent divergences. Increasingly sophisticated genetic analyses make it easier to distinguish allopatric taxa, but criteria for recognition at the species level are highly inconsistent across studies. Future molecular genetic analyses should help to resolve many of these issues, particularly if coupled with other biological and paleontological approaches.

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“…In the same way, abalone hybrids have the potential to provide production gains through faster growth, adaptation to particular environmental culture conditions and desired market qualities, such as texture, colour and taste ⁄ flavour (Elliott 2000;Hamilton et al 2009a). The presence of interspecific hybridization in Haliotis was archived, for the first time, for wild abalone hybrids off the Californian, Japanese and Australian coasts (Owen et al 1971;Fujino et al 1980;Sasaki et al 1980;Brown & Murray 1992;Brown 1995). Since then, hybrids reported among Haliotis species count for more than 50 crosses worldwide and, in some cases, they have been confirmed by experimental evidence.…”

Section: Introductionmentioning

confidence: 96%

Intraspecies and interspecies hybrids in Haliotis: natural and experimental evidence and its impact on abalone aquaculture

Cruz

Gallardo‐Escárate

2011

Reviews in Aquaculture

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Abalone is a highly valued seafood in many parts of the world. Depending on size and species, it can fetch between US$15 and US$30 per kg in some markets. Because of its high value, abalone is cultured in several countries, including China, Australia, Japan, Chile, South Africa, Canada, Mexico, the USA and many other Asian countries, such as Thailand, the Philippines and Korea. Hybridization is widely used to improve specific traits in animal and agricultural stocks by using a new genetic conformation in the offspring. In general, hybridization offers several benefits in aquaculture conditions, such as improvements in growth rate, survival, food conversion and stress resistance (to temperature and disease). Under commercial conditions, hybrids make it possible to diversify the industry and to offer new products and gain new markets. This review examines evidence of wild and experimental hybridization among abalone species from several biogeographical areas worldwide, and provides information on the phenotype characteristics of artificially produced hybrid abalone. Genetic and phenotypic approaches were analysed to determine whether there is a relationship between the genetic variability and positive heterosis in hybrid crosses. In this review, we also reported embryonic and larval development of hybrid and genetic studies derived from gene expression analysis of thermal tolerance. Furthermore, alloenzyme, cytogenetic and molecular DNA markers were reviewed to certify the hybrid status in Haliotis. This review will also discuss the impact of intra and interspecies hybrids on abalone aquaculture worldwide.

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Genetic evidence for hybridisation between Haliotis rubra and H. laevigata

Cited by 29 publications

References 11 publications

Karyotype comparison betweenHaliotis rubra,H. laevigataand the interspecific hybrid

Karyotype comparison betweenHaliotis rubra,H. laevigataand the interspecific hybrid

Molecular genetic analyses of species boundaries in the sea

Intraspecies and interspecies hybrids in Haliotis: natural and experimental evidence and its impact on abalone aquaculture

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