J. Francisco‐Ortega

Publications173
h-index40
Citations5,354
Highly Influential Citations355
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Hybridization and the Extinction of Rare Plant Species
TLDR
It is suggested that hybridization is an increasing threat to rare species because ecological barriers are being disrupted by human activities and the negative consequences of hybridization are unlikely to be compensated for by immigration from conspecific populations. Expand
Plant genetic diversity in the Canary Islands: a conservation perspective.
TLDR
A review of allozyme variation in 69 endemic species belonging to 18 genera and eight families indicates that the most effective strategy for preserving genetic variation in species is to conserve as many populations as possible. Expand
Molecular evidence for a Mediterranean origin of the Macaronesian endemic genus Argyranthemum (Asteraceae).
TLDR
A combined analysis of ITS sequences and cpDNA restriction sites indicates that Argyranthemum is sister to the other three genera of Chrysantheminae, and restriction site analyses of the entire chloroplast genome remain a valuable approach for studying recently derived island plants. Expand
Relationships of the Macaronesian and Mediterranean floras: molecular evidence for multiple colonizations into Macaronesia and back-colonization of the continent in Convolvulus (Convolvulaceae).
TLDR
The patterns of colonization into Macaronesia demonstrated by Convolvulus and also by other multiple colonizing genera conform to either a pattern of phylogenetic distinctiveness or a checkerboard distribution of island lineages, consistent with the hypothesis that niche preemption is responsible for the limited number of colonizations into the region. Expand
A common origin for woody Sonchus and five related genera in the Macaronesian islands: molecular evidence for extensive radiation.
TLDR
Increase of woodiness is concordant with other insular endemics and refutes the relictural nature of woody Sonchus in the Macaronesian islands and indicates that the alliance probably occurred in the Canary Islands during the late Miocene or early Pliocene. Expand
The complete external transcribed spacer of 18S-26S rDNA: amplification and phylogenetic utility at low taxonomic levels in asteraceae and closely allied families.
TLDR
It is shown that concerted evolution was proceeding rapidly enough in ETS that species-specific phylogenetic signal was retained and it should be now be possible to use the entire ETS for phylogenetic reconstruction of recently diverged lineages in Asteraceae and at least three other families. Expand
Phylogenetic relationships and evolution of Crassulaceae inferred from matK sequence data.
TLDR
A southern African origin of the family is suggested, with subsequent dispersal northward into the Mediterranean region and two separate lineages of European Crassulaceae subsequently dispersed to North America and underwent substantial diversification. Expand
Chloroplast DNA evidence of colonization, adaptive radiation, and hybridization in the evolution of the Macaronesian flora.
TLDR
The patterns of phylogenetic relationships in Argyranthemum indicate that interisland colonization between similar ecological zones is the main mechanism for establishing founder populations, combined with rapid radiation into distinct ecological zones and interspecific hybridization is the primary explanation for species diversification. Expand
Molecular evidence for multiple origins of woodiness and a new world biogeographic connection of the Macaronesian island endemic Pericallis (Asteraceae: senecioneae).
TLDR
A phylogeny based on sequences of the internal-transcribed spacer region of nuclear ribosomal DNA is used to trace the evolution of woodiness in Pericallis, a genus endemic to the Macaronesian archipelagos of the Azores, Madeira, and Canaries, showing that woodiness originated independently at least twice in these islands. Expand
Phylogeny of the cycads based on multiple single-copy nuclear genes: congruence of concatenated parsimony, likelihood and species tree inference methods.
TLDR
A single, well-supported phylogenetic hypothesis of the generic relationships of the Cycadales is presented, and this phylogeny can contribute to an accurate infrafamilial classification of Zamiaceae. Expand
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