The role of chromosome changes in the diversification of<i>Passiflora</i>L. (Passifloraceae)

Sader, Mariela Analía; Amorim, Bruno S.; Costa, Lucas; Souza, Gustavo; Pedrosa‐Harand, Andrea

doi:10.1080/14772000.2018.1546777

Cited by 36 publications

(42 citation statements)

References 81 publications

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“…In contrast, Ty1/copia retrotransposons showed higher proportion (35.7%) in P. cincinnata, due to an even higher proportion of Angela (29%). This high abundance of Ty1/copia has already been observed in the passion-fruit, Passiflora edulis (16.89% versus 33.33% for Ty3/gypsy, Pamponét et al 2019), another species from the Passiflora subgenus but more closely related to P. quadrangularis than to P. cincinatta (Sader et al 2019a). In Passiflora edulis (1,232…”

Section: Such Differences In Percentage Of Te Explains Most Of the DIsupporting

confidence: 52%

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Large vs small genomes inPassiflora: the influence of the mobilome and the satellitome

Sader

Vaio

Cauz-Santos

et al. 2020

Preprint

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Repetitive sequences are ubiquitous and fast-evolving elements responsible for size variation and large-scale organization of plant genomes. Within Passiflora genus, a ten-fold variation in genome size, not attributed to polyploidy, is known. Here, we applied a combined in silico and cytological approach to study the organization and diversification of repetitive elements in three species of these genera representing its known range in genome size variation. Sequences were classified in terms of type and repetitiveness and the most abundant were mapped to chromosomes. We identified Long Terminal Repeat (LTR) retrotransposons as the most abundant elements in the three genomes, showing a considerable variation among species. Satellite DNAs (satDNAs) were less representative, but highly diverse between subgenera. Our results clearly confirm that the largest genome species (Passiflora quadrangularis) presents a higher accumulation of repetitive DNA sequences, specially Angela and Tekay elements, making up most of its genome. Passiflora cincinnata, with intermediate genome and from the same subgenus, showed similarity with P. quadrangularis regarding the families of repetitive DNA sequences, but in different proportions. On the other hand, Passiflora organensis, the smallest genome, from a different subgenus, presented greater diversity and the highest proportion of satDNA. Altogether, our data indicate that while large genome evolve by an accumulation of retrotransponsons, small genomes most evolved by diversification of different repeat types, particularly satDNAs.

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Section: Such Differences In Percentage Of Te Explains Most Of the DIsupporting

confidence: 52%

“…Summary of the composition of the repetitive fraction originated from individual clustering analysis in the three Passiflora genomes and their evolutionary relationship based on(Sader et al 2019a). …”

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confidence: 99%

Large vs small genomes inPassiflora: the influence of the mobilome and the satellitome

Sader

Vaio

Cauz-Santos

et al. 2020

Preprint

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“…2008 ; Nabhan and Sarkar 2012 ), new analyses of an increased number of species may help elucidate the taxonomy within this subgenus. Interesting results were published by Sader et al. (2019) providing a robust and well-resolved time-calibrated phylogeny including some 100 taxa, and by means of phylogenetic comparative methods, they tested the relative importance of polyploidy in Passiflora evolution and diversification.…”

Section: Discussionmentioning

confidence: 99%

A Repertory of Rearrangements and the Loss of an Inverted Repeat Region in Passiflora Chloroplast Genomes

Cauz-Santos

Costa

Callot

et al. 2020

Genome Biology and Evolution

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Chloroplast genomes (cpDNA) in angiosperms are usually highly conserved. Although rearrangements have been observed in some lineages, such as Passiflora, the mechanisms that lead to rearrangements are still poorly elucidated. In the present study, we obtained 20 new chloroplast genomes (18 species from the genus Passiflora, and Dilkea retusa and Mitostemma brevifilis from the family Passifloraceae) in order to investigate cpDNA evolutionary history in this group. Passiflora cpDNAs vary in size considerably, with ∼50 kb between shortest and longest. Large inverted repeat (IR) expansions were identified, and at the extreme opposite, the loss of an IR was detected for the first time in Passiflora, a rare event in angiosperms. The loss of an IR region was detected in P. capsularis and P. costaricensis, a species in which occasional biparental chloroplast inheritance has previously been reported. A repertory of rearrangements, such as inversions and gene losses were detected, making Passiflora one of the few groups with complex chloroplast genome evolution. We also performed a phylogenomic study based on all the available cp genomes and our analysis implies that there is a need to reconsider the taxonomic classifications of some species in the group.

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“…According to phylogenetic studies, the basic numbers would support the monophyly of each subgenus (Muschner et al 2003). Despite the morphological and cytogenetic differences, the molecular studies indicate that subgenera Passiflora and Dysosmia would be more related with each other and less with subgenus Decaloba (Sader et al 2019;Muschner et al 2003).…”

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confidence: 98%

Karyotypic analyses and genomic affinity among Argentinean species of Passiflora

et al. 2020

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The genus Passiflora (Passifloraceae) has more than 500 species, nineteen are native to Argentina. By their austral distribution, these species were included in breeding programs to obtain ornamental varieties tolerant to low temperatures. The aim of this work was to know the cytogenetic characteristics of Passiflora genotypes present in a working collection, as an indispensable knowledge for the development of a breeding plan. Chromosomal preparations were performed and karyotypic characteristics, rDNA sites by FISH and affinity among subgenera by GISH were studied. Chromosome counts in fourteen Argentinean species confirmed the basic chromosome numbers previously published: x = 6 for subgenus Decaloba, x = 9 for subgenus Passiflora and x = 10 for Dysosmia. The karyotypic parameters (karyotype, haploid chromosome length and asymmetry indices) and genomic affinities among the subgenera, clarify most of the chromosomal evolution of the genus. The results obtained strongly suggest that the basic number x = 6 would be the original one and that x = 9 was originated by processes of polyploidy and descendent dysploidy. Since subgenus Passiflora possesses the largest genomes, it is postulated that evolutionary process leading to x = 9 was accompanied by unequal distribution of non-coding repetitive DNA, mainly transposable elements. These processes could explain the asymmetrical karyotypes of species of subgenus Passiflora.

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The role of chromosome changes in the diversification ofPassifloraL. (Passifloraceae)

Cited by 36 publications

References 81 publications

Large vs small genomes inPassiflora: the influence of the mobilome and the satellitome

Large vs small genomes inPassiflora: the influence of the mobilome and the satellitome

A Repertory of Rearrangements and the Loss of an Inverted Repeat Region in Passiflora Chloroplast Genomes

Karyotypic analyses and genomic affinity among Argentinean species of Passiflora

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