Reproductive Potential and Genetics of Triploid Pacific Oysters, Crassostrea gigas (Thunberg)
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چکیده
منابع مشابه
Heterozygosity and body size in triploid Pacific oysters, Crassostrea gigas Thunberg, produced from meiosis II inhibition and tetraploids
Triploid molluscs grow significantly faster than diploids in most species studied so far, a phenomenon that has been referred to as triploid gigantism. Three hypotheses have been proposed, attributing triploid gigantism to sterility, increased heterozygosity, or cell size. Testing the heterozygosity hypothesis, the authors measured the body size and allozyme heterozygosity in Ž . Ž . three repl...
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Mortalities of oyster Crassostrea gigas seed associated with ostreid herpesvirus OsHV-1 μVar have been observed in many oyster-producing countries since 2008. The present study, comprised of 4 complementary experiments, aimed to identify factors associated with disease-induced oyster mortality in order to propose mitigation strategies. Our first experiment compared survival of oysters from natu...
متن کاملDelayed meiosis and polar body release in eggs of triploid Pacific oysters, Crassostrea gigas, in relation to tetraploid production.
The dynamics of polar body release are important for creating polyploid shellfish. For producing triploids, these dynamics concern meiosis in diploid eggs and are well understood. For creating tetraploids, eggs from triploids are employed and the dynamics, variation, and environmental influences upon polar body release are less studied. We investigated the effects of several agents on the timin...
متن کاملHow annual course of photoperiod shapes seasonal behavior of diploid and triploid oysters, Crassostrea gigas
In this work, we study if ploidy (i.e. number of copies of chromosomes) in the oyster Crassostrea gigas may introduce differences in behavior and in its synchronization by the annual photoperiod. To answer to the question about the effect of the seasonal course of the photoperiod on the behavior of C. gigas according to its ploidy, we quantified valve activity by HFNI valvometry in situ for 1 y...
متن کاملTranscriptomic Profiling of Gametogenesis in Triploid Pacific Oysters Crassostrea gigas: Towards an Understanding of Partial Sterility Associated with Triploidy
BACKGROUND Triploidy can occur in many animal species but is often lethal. Among invertebrates, amphibians and fishes, triploids are viable although often sterile or infertile. Most triploids of the Pacific oyster Crassostrea gigas are almost sterile (named "3nβ") yet a low but significant proportion show an advanced gametogenesis (named "3nα"). These oysters thus constitute an interesting mode...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1994
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1542288