Taxonomy of the genus Ruppia in China

Yu, Shengrui; Hartog, C. Den

doi:10.1016/j.aquabot.2014.08.003

Cited by 20 publications

(37 citation statements)

References 11 publications

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“…Kikuchi (1946) and Yu (1979) described the taxonomy of Chinese and Japanese pears using morphological and pomological characters. Lin and Shen (1983) divided pear cultivars using peroxidase isozymic pattern and Zou et al (1986) divided pear cultivars based on pollen ultrastructure.…”

Section: Discussionmentioning

confidence: 99%

AFLP Molecular Identification and Genetic Relationship of Chinese and Japanese Pear Cultivars Grown in Middle European Conditions

Wolf

Baránková

Nečas

2017

Not Bot Horti Agrobo

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In this study, 30 genotypes of genus Pyrus (five European cultivars, 16 Asian cultivars, three rootstocks, four interspecific hybrids, one landrace cultivar from Czech Republic ('Krvavka'), Pyrus betulaefolia Bunge. and one intergeneric hybrid (Cydomalus)) were tested using AFLP markers. Twelve primer combinations generated a number of 1251 fragments of which 1064 were polymorphic with an average polymorphism of 85.3%. The dendrogram, created by using the UPGMA method, revealed a distinct genetic relationship between European and Asian pear groups. The intergeneric hybrid Cydomalus was separated in the cluster tree from both groups. The level of similarity coefficient between European and Asian pears was 0.75. Despite the fact that Pyrus betulaefolia Bunge was clustered in the European pear group, the average similarity coefficient between the European pear group and Pyrus betulaefolia Bunge (0.7704) was comparable to the similarity coefficient between the Asian pear group and Pyrus betulaefolia Bunge (0.768). Thus, the botanic species Pyrus betulaefolia Bunge can likely be considered as an intermediate genotype between European and Asian pears. The cultivar 'Talgarskaja Krasavica' (chance seedling of 'Forest Beauty'), which pomologically belongs to the European pear group was clustered together with the interspecific hybrid 'Wu Jiu Xinag' ('Ya Li' × 'Bartlett') which on the other hand belongs to the Asian pear group. Thus, due to its position in the dendrogram the cultivar 'Talgarskaja Krasavica' could be considered as an interspecific hybrid.

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Section: Discussionmentioning

confidence: 99%

AFLP Molecular Identification and Genetic Relationship of Chinese and Japanese Pear Cultivars Grown in Middle European Conditions

Wolf

Baránková

Nečas

2017

Not Bot Horti Agrobo

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“…The latter complex has caused much of the taxonomic uncertainty in Mediterranean R. maritima Sierens, 2013, 2014). A related haplotype E, also was found for the newly described R. sinensis (putatively published as R. maritima in along the coast of China (Yu and den Hartog, 2014). These putative R. maritima along the coast of China were revised under two new species (Yu and den Hartog, 2014).…”

Section: Introductionmentioning

confidence: 95%

“…An unfortunate use of R. maritima as a single worldwide taxon in traditional treatments of national flora publications or regional wetland inventories led to an overestimation of its distributional range and an underestimation of Ruppia species diversity (Yu and den Hartog, 2014;. As a consequence of apparent uncertainties at world scale level, no reliable distribution range maps of Ruppia species could be made available (Short et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the genetic identity of R. maritima sensu stricto (the European taxon as described by Linnaeus) needs clarification. Both morphological and genetic evidence should be used to determine its distribution limits (Triest and Sierens, 2013;Yu and den Hartog, 2014). Once the species' limitation is sorted out, field studies will be needed to further assess the actual range of this diploid taxon.…”

Section: Introductionmentioning

confidence: 99%

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Strong bottlenecks, inbreeding and multiple hybridization of threatened European Ruppia maritima populations

Triest¹,

Sierens

2015

Aquatic Botany

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“…As a consequence of apparent uncertainties at world scale level, no reliable distribution maps of Ruppia species are available so far, in contrast to many of the seagrasses (Short et al, ) and freshwater submerged plant species. A literature search revealed 90 different taxon names (including subspecies and varieties) within the Ruppia genus that have been used since 1787 (86 mentioned by Van der Zee, 1985 in Yu & den Hartog, ; and four new species since 2014, see below), but many are considered as synonyms. Towards the end of the 20th century, many researchers believed that R. maritima L. was the most common and widespread species of the genus, occurring on all continents along the coast and in inland saltwater habitats (Green & Short, ).…”

Section: Introductionmentioning

confidence: 99%

Lagoons and saltwater wetlands getting more diversity: A molecular approach reveals cryptic lineages of a euryhaline submerged macrophyte (Ruppia)

Triest

Beirinckx

Sierens

2017

Aquatic Conservation

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Ruppia species are distantly related to seagrasses and occur in saltwater coastal and inland lagoons, mostly as monospecific beds. The diversity of euryhaline Ruppia populations from different continents recently became better understood from a suite of chloroplast sequences but limited nuclear markers. These revealed a high complexity from hybridization, introgression, polyploidy and haplotypic divergence. Because of this complexity within the genus and multiple allelic states in polyploids, three multiplexed sets of 24 nuclear microsatellites were developed from four Ruppia provenances and cross‐amplified on 130 individuals from a wide range of taxa in various aquatic habitats on different continents. Secondly, pure R. cirrhosa and R. maritima individuals could be unambiguously identified from their introgressed hybrids and from other known or yet unidentified taxa, using diagnostic markers that referred to autotetraploid individuals in R. cirrhosa and allotetraploidy in an ancient hybrid complex ‘haplogroup E’. Thirdly, a phenetic barcoding approach of trnH‐psbA chloroplast haplotypes taking into account insertion–deletion variations, revealed lineages of recently described taxa from lagoons in different continents (i.e. R. sinensis, R. brevipedunculata, R. mexicana) in addition to separate lineages of hybrid origin. Congruence between pollination mode and diversification of lineages, allows one to hypothesize whether selfing underwater leads to clearly separated lineages whereas outcrossing at the water surface allows hybridization and extensive introgression with potential chloroplast capture. This study raises a renewed interest in cryptic lineages, hybrid taxa and shallow phylogenies of Ruppia lineages, thereby critically questioning worldwide distributions of least concern species. Recognition and monitoring of unique Ruppia lineages will support further studies on connectivity, survival strategies and movement ecology to aid in determining the conservation status of a wide variety of lagoon and coastal wetland habitats.

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Taxonomy of the genus Ruppia in China

Cited by 20 publications

References 11 publications

AFLP Molecular Identification and Genetic Relationship of Chinese and Japanese Pear Cultivars Grown in Middle European Conditions

AFLP Molecular Identification and Genetic Relationship of Chinese and Japanese Pear Cultivars Grown in Middle European Conditions

Strong bottlenecks, inbreeding and multiple hybridization of threatened European Ruppia maritima populations

Lagoons and saltwater wetlands getting more diversity: A molecular approach reveals cryptic lineages of a euryhaline submerged macrophyte (Ruppia)

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