Genetic diversity and relationships of the brown alga Undaria pinnatifida cultivated along the Dalian Coast as revealed by amplified fragment length polymorphism markers

Li, Shiguo; Qiao, Kun; Shan, Tifeng; Pang, Shaojun; Hou, Hanxue

doi:10.1007/s10811-012-9922-1

Cited by 7 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, establishment in new habitats likely represents a considerable bottleneck due to rare introductions with these vectors in comparison with running water. Detectable linkage disequilibrium and low expected heterozygosity in G. semen based on AFLP loci compared with several species of haploid microalgae (Logares et al ., ; Alpermann et al ., ; Tahvanainen et al ., ) and diploid macroalgae (Shan et al ., ; Li et al ., ) support a scenario of recent genetic bottlenecks and the range expansion of this species in Northern Europe, which was suggested in several monitoring studies (Rengefors et al ., ; Lebret et al ., ; Trigal et al ., ; Hagman et al ., ). The observation of small but significant F ST values is also fully compatible with this scenario.…”

Section: Discussionmentioning

confidence: 98%

Freshwater protists do not go with the flow: population structure in Gonyostomum semen independent of connectivity among lakes

Sassenhagen

Sefbom

Sall

et al. 2015

Environmental Microbiology

View full text Add to dashboard Cite

SummaryMany recent studies have found genetically differentiated populations in microorganisms despite potentially high dispersal. We designed a study to specifically examine the importance of physical dispersal barriers, i.e. geographic distance and lack of hydrological connectivity, in restricting gene flow and enhancing divergence in limnic microorganisms. We focused on the nuisance microalga Gonyostomum semen, which has recently expanded in Northern Europe and differentiated into genetically distinct populations. G. semen was sampled from six lakes distributed in two adjacent watersheds, which thereby comprised, both connected and nonconnected lakes. The individual isolates were genotyped by amplified fragment length polymorphism. Several lake populations were differentiated from each other, but connectivity within watersheds could not explain the observed population genetic pattern. However, isolation by distance was moderate and might limit the gene flow among distant populations. In addition, we found low, but significant linkage disequilibrium, which indicates regular sexual recombination in this species, despite its high degree of asexual reproduction. Therefore, we conclude that the genetic properties of microalgae with occasional sexual reproduction essentially mirror regularly recombining species. Furthermore, the data indicated bottlenecks supporting the hypothesized recent range expansion of this species.

show abstract

Section: Discussionmentioning

confidence: 98%

Freshwater protists do not go with the flow: population structure in Gonyostomum semen independent of connectivity among lakes

Sassenhagen

Sefbom

Sall

et al. 2015

Environmental Microbiology

View full text Add to dashboard Cite

show abstract

“…Li et al (2013) found that around 64% genetic variation occurred amongst populations and 36% occurred within the populations. The decreased population genetic diversity in Dalian, China, mainly resulted from repeated self-crossing of the same parental strains and limited gene flow, highlighting the necessity to preserve the degrading genetic germplasm (Li et al 2013). More recently, mitochondrial DNA was used to elucidate the genetic diversity of U. pinnatifida in native and invasive populations, and the detected haplotypes were correlated to identify the possible origins of the invasive populations (Uwai et al 2006b).…”

Section: Dna Fingerprinting and Genetic Assessmentmentioning

confidence: 99%

“…In contrast, genetic analyses based on polymorphic microsatellites revealed a high genetic diversity within the natural and farmed populations from China (Shan et al 2012, 2018; Li et al 2020). Li et al (2013) found that around 64% genetic variation occurred amongst populations and 36% occurred within the populations. The decreased population genetic diversity in Dalian, China, mainly resulted from repeated self‐crossing of the same parental strains and limited gene flow, highlighting the necessity to preserve the degrading genetic germplasm (Li et al 2013).…”

Section: Dna Fingerprinting and Genetic Assessmentmentioning

confidence: 99%

Kelp aquaculture in China: a retrospective and future prospects

Shan

Zhang

et al. 2021

Reviews in Aquaculture

View full text Add to dashboard Cite

Globally, China has the largest scale of kelp cultivation and production operations. However, its kelp aquaculture industry is suffering from declining germplasm diversity, degradation of agronomic traits, the presence of polluted environments, changing ocean conditions and increasing anthropological interference. This review covers two of the most commercially important kelp species in China, viz. Saccharina japonica and Undaria pinnatifida. It summarizes the history of their cultivation, production, economic and ecological benefits, their breeding programmes (e.g. inter-and intra-specific hybridization and marker-assisted selection) and efforts towards population genetic diversity and conservation. The article focuses on three significant challenges, for example genetic crosscontamination between the wild and farmed kelp populations, ocean warming and ocean acidification. Accordingly, we outline the steps required to provide several intervention measures, for example (i) collection and preservation of wild and cultivated kelp germplasm; (ii) selection of suitable cultivation sites under changing environmental conditions; (iii) developing stress-resistant cultivars; and finally, (iv) adoption of innovative cultivation models. The review concludes with genome-based, designs for molecular breeding and calls for the establishment of an East Asian Kelp Consortium (EAKC). Collectively, the Chinese kelp industry could provide beneficial goods and services, for example bioenergy to fine chemicals and environmental benefits, such as carbon capture, pH amelioration and provision of habitat for many other marine species of commercial value. The strategies proposed in this article thus have the potential to not only improve but also reinvigorate the kelp industry in China and nearby Japan and Korea, in the context of both environmental health and economic benefits.

show abstract

“…Markers such as random amplified polymorphic DNA (RAPD) and amplified fragment length polymorphism (AFLP) were adopted for genetic diversity analyses and germplasm identification in U. pinnatifida in earlier time ( Wang et al, 2006 ; Li et al, 2013 ), but their use has been dramatically decreasing due to their drawback of dominant nature. Microsatellites and SNPs are currently the markers of choice for analyses of genetic diversity and structure.…”

Section: Dna Markers Development and Their Application In Studies Of Genetypic Variation And Genetic Structurementioning

confidence: 99%

Breeding in the Economically Important Brown Alga Undaria pinnatifida: A Concise Review and Future Prospects

Shan

Pang

2021

Front. Genet.

Self Cite

View full text Add to dashboard Cite

Undaria pinnatifida is the commercially second most important brown alga in the world. Its global annual yield has been more than two million tonnes since 2012. It is extensively cultivated in East Asia, mainly consumed as food but also used as feed for aquacultural animals and raw materials for extraction of chemicals applicable in pharmaceutics and cosmetics. Cultivar breeding, which is conducted on the basis of characteristics of the life history, plays a pivotal role in seaweed farming industry. The common basic life history shared by kelps determines that their cultivar breeding strategies are similar. Cultivar breeding and cultivation methods of U. pinnatifida have usually been learned or directly transferred from those of Saccharina japonica. However, recent studies have revealed certain peculiarity in the life history of U. pinnatifida. In this article, we review the studies relevant to cultivar breeding in this alga, including the peculiar component of the life history, and the genetics, transcriptomics and genomics tools available, as well as the main cultivar breeding methods. Then we discuss the prospects of cultivar breeding based on our understanding of this kelp and what we can learn from the model brown alga and land crops.

show abstract

Genetic diversity and relationships of the brown alga Undaria pinnatifida cultivated along the Dalian Coast as revealed by amplified fragment length polymorphism markers

Cited by 7 publications

References 39 publications

Freshwater protists do not go with the flow: population structure in Gonyostomum semen independent of connectivity among lakes

Freshwater protists do not go with the flow: population structure in Gonyostomum semen independent of connectivity among lakes

Kelp aquaculture in China: a retrospective and future prospects

Breeding in the Economically Important Brown Alga Undaria pinnatifida: A Concise Review and Future Prospects

Contact Info

Product

Resources

About