Genetic improvement of aquaculture performance for tetraploid Pacific oysters, Crassostrea gigas: A case study of four consecutive generations of selective breeding

Wan, Weitao; Qin, Yanping; Shi, Gongpengyang; Li, Shengyong; Liao, Qingliang; Ma, Haitao; Li, Jun; Suo, Anning; Ding, Dewen; Zhou, Yu; Zhang, Yuehuan

doi:10.1016/j.aquaculture.2022.738910

Cited by 12 publications

(8 citation statements)

References 47 publications

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“…The difference in composition between tetraploid and diploid C. gigas may be due to the fact that tetraploid oysters with normal gonadal development carry signi cantly more eggs than diploid oysters, and the diameter of the eggs is larger than that of diploid oysters. In addition, some of the eggs of tetraploid oysters are dysfunctional (Guo and Allen, 1997;Wan et al, 2023). The differing energy needs of female and male gametes may account for the disparities between male and female oysters (Beninger and Pennec, 2003).…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of biochemical composition, amino acids, and fatty acids among diploid, triploid, and tetraploid Crassostrea gigas

FU,

Zhang,

et al. 2023

Preprint

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Tetraploid oysters are artificially produced oysters that do not exist in nature. The successful breeding of 100% triploid oysters resolved the difficulties with traditional drug–induced triploids such as the presence of drug residues and the low triploid induction rate. However, little is known concerning the biochemical composition and nutrient contents of such tetraploids. Therefore, we investigated compositional differences among diploid, triploid, and tetraploid Crassostrea gigas as well as between males and females of diploids and tetraploids. The findings indicated that glycogen, EPA, ∑PUFA and Omega-3 contents were significantly higher in triploid oysters than in diploid or tetraploid; tetraploid oysters had significantly higher C14:0, essential amino acid, and flavor-presenting amino acid contents than diploids or triploids, while diploid oysters had the highest protein content. For both diploid and tetraploids, females had significantly higher levels of glutamate, methionine, and phenylalanine than males but lower levels of glycine and alanine. In addition, female oysters had significantly more EPA, DHA, omega-3 and total fatty acids, a result that may be due to the fact that gonadal development in male oysters requires more energy to sustain growth, consumes greater amounts of nutrients, and accumulates more proteins. With these results, important information is provided for the production of C. gigas, as well as the basis and backing for genetic breeding of oysters.

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Section: Discussionmentioning

confidence: 99%

Comparative analysis of biochemical composition, amino acids, and fatty acids among diploid, triploid, and tetraploid Crassostrea gigas

FU,

Zhang,

et al. 2023

Preprint

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“…12,160 Unlike triploids, tetraploids are fertile and can be spawned with each other to maintain a commercial breeding population (Figure 5b). 161 Wan et al 162 conducted a mass selection of tetraploid C. gigas to improve their performance from 2017 to 2022. The growth features of tetraploid offspring were greatly improved after four generations of continuous mass selection, and the proportion of tetraploid progeny increased substantially and reached more than 90%.…”

Section: Production and Maintenance Of Tetraploid Oystersmentioning

confidence: 99%

“…The growth features of tetraploid offspring were greatly improved after four generations of continuous mass selection, and the proportion of tetraploid progeny increased substantially and reached more than 90%. 162 However, a significant drop in diversity was observed over two successive generations of tetraploid oysters. 161 Their parental contributions are unequal and the effective population size is smaller than the census population, which indicates a great potential for inbreeding.…”

Section: Production and Maintenance Of Tetraploid Oystersmentioning

confidence: 99%

Genetic improvement of oysters: Current status, challenges, and prospects

Jiang,

Chen,

Jiang

et al. 2023

Reviews in Aquaculture

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Oysters are one of the most commercially important shellfish species and have been cultured for thousands of years. Oyster aquaculture supports the major aquaculture industries in many countries. Over the last few decades, the oyster breeding and aquaculture industries have developed rapidly to meet the continually growing demand. Many researchers have made significant efforts toward the genetic improvement of commercially important traits in oysters. Some strains with fast‐growing, disease‐resistant, and stable shell‐colours have been developed through selective breeding. Some hybrid varieties have been developed by crossing different geographical populations or cultivated strains. Several hybrids exhibit considerable genetic variation and improved productive performance. Additionally, polyploid induction technologies have been applied in the oyster aquaculture industry, which provides a useful tool for performance improvement and genetic containment of cultured stocks. At present, the development of molecular breeding also provides a great opportunity for oyster genetic improvement. These advances in oyster breeding have improved the quality of oysters, brought great economic benefits, and been conducive to the sustainability of oyster production. Nonetheless, there are still some limitations and obstacles in oyster breeding, such as infectious diseases, summer mortality, conservation of germplasm resources, environmental contamination, and climate change. The present review provides an overview of the current status, challenges, and prospects in oyster breeding.

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“…As a classical approach, mass selection is widely used in selective breeding programs for aquatic animals, which can be easily implemented by establishing several selected generations to assess the breeding potential of desired traits 22 , 23 . Previously, mass selective breeding programs for most aquatic animals offered the possibility of exerting high selection pressure to improve growth traits, and their genetic diversity could be efficiently maintained through genetic mating strategies 23 – 27 . Selective breeding has been demonstrated in oysters and scallops, an intrinsic means of improving edible flesh quality 20 , 23 , 28 .…”

Section: Introductionmentioning

confidence: 99%

“…Previously, mass selective breeding programs for most aquatic animals offered the possibility of exerting high selection pressure to improve growth traits, and their genetic diversity could be efficiently maintained through genetic mating strategies 23 – 27 . Selective breeding has been demonstrated in oysters and scallops, an intrinsic means of improving edible flesh quality 20 , 23 , 28 . But to date, information on the flesh quality of M. mercenaria has been limited.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the flavor qualities between two varieties of Mercenaria mercenaria

Zhang

Chen

et al. 2023

Sci Rep

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The saltwater hard clam Mercenaria mercenaria (M. mercenaria) as a representative of low-value shellfish, enhancing its flavor quality, is the key to enter the high-end market. Nevertheless, there has not been reported research on the flavor quality of M. mercenaria. This study compared the flavor quality of selective and non-selective saltwater hard clams of M. mercenaria by using various indicators: proximate component, free amino acids, nucleotides, and metabolomic analysis. The results indicated that selective breeding contributed to the significant improvement contents of crude protein, flavor-associated free amino acids (glutamic acid, aspartic acid, proline, etc.), and nucleotides (AMP) (P < 0.05). Then, the metabolome was utilized to assess the metabolite changes in the pre/post-selective breeding of M. mercenaria and further understand the flavor characteristics and metabolic status. In the metabolomics assay, among the 3143 quantified metabolites, a total of 102 peaks were identified as significantly different metabolites (SDMs) between the selective and non-selective varieties of M. mercenaria (VIP > 1 and P < 0.05). These results can provide new insights for future research on improving the quality of saltwater bivalves through selective breeding.

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Genetic improvement of aquaculture performance for tetraploid Pacific oysters, Crassostrea gigas: A case study of four consecutive generations of selective breeding

Cited by 12 publications

References 47 publications

Comparative analysis of biochemical composition, amino acids, and fatty acids among diploid, triploid, and tetraploid Crassostrea gigas

Comparative analysis of biochemical composition, amino acids, and fatty acids among diploid, triploid, and tetraploid Crassostrea gigas

Genetic improvement of oysters: Current status, challenges, and prospects

Comparison of the flavor qualities between two varieties of Mercenaria mercenaria

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