Cryptic introduction of water chestnut (Trapa) in the northeastern United States

Chorak, Gregory M.; Dodd, Lynde L.; Rybicki, Nancy B.; Ingram, Kadiera; Buyukyoruk, Murat; Kadono, Yasurō; Chen, Yuan Yuan; Thum, Ryan A.

doi:10.1016/j.aquabot.2019.02.006

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…The knowledge of species identification and phylogenetic relationship is essential to effectively managing genetic resources [ 12 , 13 ]. However, the genus Trapa possesses complicated morphological variations, but lacks effective diagnostic criteria.…”

Section: Introductionmentioning

confidence: 99%

Fifteen complete chloroplast genomes of Trapa species (Trapaceae): insight into genome structure, comparative analysis and phylogenetic relationships

et al. 2022

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Background Trapa L. is a floating-leaved aquatic plant with important economic and ecological values. However, the species identification and phylogenetic relationship within Trapa are still controversial, which necessitates the need for plastid genome information of Trapa. In this study, complete chloroplast genomes of 13 Trapa species/taxa were sequenced and annotated. Combined with released sequences, comparative analyses of chloroplast genomes were performed on the 15 Trapa species/taxa for the first time. Results The Trapa chloroplast genomes exhibited typical quadripartite structures with lengths from 155,453 to 155,559 bp. The gene orders and contents within Trapa were conservative, but several changes were found in the microstructure. The intron loss of rpl2, also detected in Lythraceae, was found in all Trapa species/taxa, suggesting close genetic relationship between Lythraceae and Trapaceae. Notably, two small-seed species (T. incisa and T. maximowiczii) showed the smallest genome size with 155,453 and 155,477 bp, respectively. Each cp genome contained the same 130 genes consisting of 85 protein-coding genes, 37 tRNA genes and 8 rRNA genes. Trapa species/taxa showed 37 (T. incisa and T. maximowiczii) to 41 (T. sibirica) long repeats, including forward, palindromic, reversed and complementary repeats. There were 110 (T. quadrispinosa) to 123 (T. incisa and T. maximowiczii) SSR (simple sequence repeat) loci in Trapa chloroplast genomes. Comparative analyses revealed that two hotspot regions (atpA—atpF and rps2—rpoC2) in Trapa chloroplast genomes could be served as potential molecular markers. Three phylogenetic analyses (ML, MP and BI) consistently showed that there were two clusters within Trapa, including large- and small-seed species/taxa, respectively; for the large-seed Trapa, they clustered according to their geographical origin and tubercle morphology on the surface of seeds. Conclusion In summary, we have acquired the sequences of 13 Trapa chloroplast genomes, and performed the comparative analyses within Trapa for the first time. The results have helped us better identify the Trapa species/taxa and deepen the understanding of genetic basis and phylogenetic relationship of Trapa, which will facilitate the effective management and utilization of the important genetic resources in the future.

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Section: Introductionmentioning

confidence: 99%

Fifteen complete chloroplast genomes of Trapa species (Trapaceae): insight into genome structure, comparative analysis and phylogenetic relationships

et al. 2022

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“…The knowledge of accurate species identification and phylogenetic relationship among species is essential to effectively protect and utilize genetic resources of wild plants and to manage and remove invasive plants (Campbell et al, 2009;Chorak et al, 2019). However, due to the large range of morphological variation and the lack of effective diagnostic criteria, researchers have held sharp different opinions on taxonomic classification of Trapa, with 1 or 2 polymorphic species or more than 20, or 70 species within the genus (Cook, 1996;Vassiljev, 1949Vassiljev, , 1965Tutin, 1968;Yan, 1983;Kak, 1988;Chen et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Comparative analyses and phylogenetic relationships of 15Trapa(Trapaceae) species based on Complete Chloroplast Genomes

Fan

Wang

et al. 2021

Preprint

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Trapa L. is floating-leaved aquatic plants with important economic and ecological values. However, species identification and phylogenetic relationship are still unresolved for Trapa. In this study, complete chloroplast genomes of 13 Trapa species/taxa were sequenced and annotated. Combined with released sequences of the other two species, comparative analysis of cp genomes was first performed on the 15 Trapa species/taxa. The 15 cp genomes exhibited quadripartite structures with medium size of 155, 453-155, 559 bp. IR/SC junctions were conservative with no obvious change found. Long repetitive repeats and SSRs were mostly detected in the intergenic and LSC regions, providing useful plastid markers for species and relationship identification. Three phylogenetic analyses (MP, ML and BI) consistently showed two clusters within Trapa, including large- and small-seed species/taxa, respectively. This study provided the baseline information for phylogeography of Trapa, which would facilitate the management and utilization of genetic resources of the genus.

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“…The work discovered that this new, cryptic introduction of water chestnut is morphologically and genetically similar to another species found in the Trapa genus, T. bispinosa var. iinumai Nakano currently recognized in People's Republic of China -Taiwan (Chorak et. al 2019).…”

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Evaluation of light limitation and depth on germinated seeds of two species of water chestnut cultured under experimental conditions

Dodd¹,

Schad²

2021

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Cryptic introduction of water chestnut (Trapa) in the northeastern United States

Cited by 14 publications

References 18 publications

Fifteen complete chloroplast genomes of Trapa species (Trapaceae): insight into genome structure, comparative analysis and phylogenetic relationships

Fifteen complete chloroplast genomes of Trapa species (Trapaceae): insight into genome structure, comparative analysis and phylogenetic relationships

Comparative analyses and phylogenetic relationships of 15Trapa(Trapaceae) species based on Complete Chloroplast Genomes

Evaluation of light limitation and depth on germinated seeds of two species of water chestnut cultured under experimental conditions

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