Effect of domestication on the genetic diversity and structure of Saccharina japonica populations in China

Zhang, Jie; Wang, Xiuliang; Yao, Jianting; Li, Qiuying; Liu, Fuli; Yotsukura, Norishige; Krupnova, Tatiana N.; Duan, Delin

doi:10.1038/srep42158

Cited by 51 publications

(66 citation statements)

References 56 publications

(86 reference statements)

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“…Domestication has reduced genetic diversity and narrowed the germplasm base of cultivated seaweeds (Huh, Lee, Lee, & Choi, 2004;Niwa & Aruga, 2006;Voisin, Engel, & Viard, 2005), and S. japonica is no exception (Zhang et al, 2017 Figure 3).…”

Section: Implications For Wild Kelp Conservation and Germplasm Utilmentioning

confidence: 99%

Phylogeographic diversification and postglacial range dynamics shed light on the conservation of the kelp Saccharina japonica

Zhang

Yao

et al. 2019

Evolutionary Applications

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Studies of postglacial range shifts could enhance our understanding of seaweed species’ responses to climate change and hence facilitate the conservation of natural resources. However, the distribution dynamics and phylogeographic diversification of the commercially and ecologically important kelp Saccharina japonica in the Northwest Pacific (NWP) are still poorly surveyed. In this study, we analyzed the evolutionary history of S. japonica using two mitochondrial markers and 24 nuclear microsatellites. A STRUCTURE analysis revealed two partially isolated lineages: lineage H, which is scattered along the coast of Japan; and lineage P, which occurs along the west coast of the Japan Sea. Ecological niche modeling projections to the Last Glacial Maximum (LGM) revealed that the southern coasts of the Japan Sea and the Pacific side of the Oshima and Honshu Peninsulas provided the most suitable habitats for S. japonica , implying that these regions served as ancient refugia during the LGM. Ancient isolation in different refugia may explain the observed divergence between lineages P and H. An approximate Bayesian computation analysis indicated that the two lineages experienced post‐LGM range expansion and that postglacial secondary contact occurred in Sakhalin. Model projections into the year 2,100 predicted that S. japonica will shift northwards and lose its genetic diversity center on the Oshima Peninsula in Hokkaido and Shimokita Peninsula in Honshu. The range shifts and evolutionary history of S. japonica improve our understanding of how climate change impacted the distribution range and diversity of this species and provide useful information for the conservation of natural resources under ongoing environmental change in the NWP.

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Section: Implications For Wild Kelp Conservation and Germplasm Utilmentioning

confidence: 99%

Phylogeographic diversification and postglacial range dynamics shed light on the conservation of the kelp Saccharina japonica

Zhang

Yao

et al. 2019

Evolutionary Applications

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“…The introduction of new varieties for seaweed cultivation is posing a number of biological challenges. For example, over reliance on genetically uniform breeds that, often have unstable performance and get discarded from the production lines after only a few years [71]. This genetic homogeneity also increases vulnerability to environmental stress and pests, because of intensification [72].…”

Section: Heritable Variation Of Phenotypic Diversity Is One Of the Fumentioning

confidence: 99%

Assessment of genetic and phenotypic diversity of the giant kelp, Macrocystis pyrifera, to support breeding programs

Camus¹,

Faugeron

Buschmann³

2018

Algal Research

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The accelerated development of seaweed aquaculture is stimulating research on the genetic drivers of phenotypic diversity of the target species, in order to optimize breeding strategies, to help determine the choice of source populations, and for the selection of traits and varieties that fit with the environmental variability of the production site. This study investigates the spatial variation of the genetic and phenotypic diversities in natural populations of the giant kelp Macrocystis pyrifera, and evaluates the potential for modifying agronomic traits through controlled breeding. Nine microsatellites and 12 morphological traits were used to describe the distribution of diversity present along the Southeastern Pacific (SEP) Coast. We expected concordant patterns of spatial discontinuities if the genetic background was driving morphological divergence across habitats. Crossing experiments were made to assess the heritability of specific traits and evaluate the performance of the F1 generation in the laboratory and in open sea cultivation respectively. Our results revealed four genetic clusters along the latitudinal distribution of M. pyrifera populations, tightly correlated with the existence of major environmental discontinuities. These clusters also matched clusters of morphological diversity, suggesting that both morphological and genetic diversities responded to the same environmental drivers. In crossing experiments, no significant differences were detected between selfed and outbred F1, in morphology, growth and chemical components, but a high variability among all different crosses was observed, revealing a high degree of heritable phenotypic variance. Although, the results suggest that the morphological variation of Macrocystis along the SEP coast is strongly driven by the genetic background. Our controlled crosses 3 were also indicative of a high potential for using this genetic variability in breeding programs for sustainable aquaculture development.

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“…, Zhang et al. ). Even when overall genetic variation remains high in cultivated stocks, as in the grain crop maize, artificial selection can lead to low genetic diversity at key genes, such as those involved in starch production and yield, compromising future breeding efforts (Whitt et al.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and phenotypic variation within hatchery‐produced oyster cohorts predict size and success in the field

Hughes

Hanley

Byers

et al. 2019

Ecological Applications

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The rapid growth of the aquaculture industry to meet global seafood demand offers both risks and opportunities for resource management and conservation. In particular, hatcheries hold promise for stock enhancement and restoration, yet cultivation practices may lead to enhanced variation between populations at the expense of variation within populations, with uncertain implications for performance and resilience. To date, few studies have assessed how production techniques impact genetic diversity and population structure, as well as resultant trait variation in and performance of cultivated offspring. We collaborated with a commercial hatchery to produce multiple cohorts of the eastern oyster (Crassostrea virginica) from field‐collected broodstock using standard practices. We recorded key characteristics of the broodstock (male : female ratio, effective population size), quantified the genetic diversity of the resulting cohorts, and tested their trait variation and performance across multiple field sites and experimental conditions. Oyster cohorts produced under the same conditions in a single hatchery varied almost twofold in genetic diversity. In addition, cohort genetic diversity was a significant positive predictor of oyster performance traits, including initial size and survival in the field. Oyster cohorts produced in the hatchery had lower within‐cohort genetic variation and higher among‐cohort genetic structure than adults surveyed from the same source sites. These findings are consistent with “sweepstakes reproduction” in oysters, even when manually spawned. A readily measured characteristic of broodstock, the ratio of males to females, was positively correlated with within‐cohort genetic diversity of the resulting offspring. Thus, this metric may offer a tractable way both to meet short‐term production goals for seafood demand and to ensure the capacity of hatchery‐produced stock to achieve conservation objectives, such as the recovery of self‐sustaining wild populations.

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Effect of domestication on the genetic diversity and structure of Saccharina japonica populations in China

Cited by 51 publications

References 56 publications

Phylogeographic diversification and postglacial range dynamics shed light on the conservation of the kelp Saccharina japonica

Phylogeographic diversification and postglacial range dynamics shed light on the conservation of the kelp Saccharina japonica

Assessment of genetic and phenotypic diversity of the giant kelp, Macrocystis pyrifera, to support breeding programs

Genetic diversity and phenotypic variation within hatchery‐produced oyster cohorts predict size and success in the field

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