The Winner Takes It All: a single genotype of Kalanchoe ×houghtonii is a global invader DOI Creative Commons
Joan Pere Pascual‐Díaz,

Neus Besolí,

Jordi López‐Pujol

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract Background and Aims Invasive alien plant species pose a global challenge, their impact is amplified by globalisation the accelerating pace of climate change. In mild-climate regions, drought-tolerant invasive plants showing broad environmental tolerance have competitive advantage. One example Kalanchoe × houghtonii (Crassulaceae), popularly known as “mother millions”. It hybrid resulting from interploid cross between K. daigremontiana delagoensis , both native to Madagascar. propagated an ornamental plant, has emerged invader in less than century. Four morphotypes this been identified, with different ploidy levels varying capacities. Here we aim investigate genomic variability behind invasion success . Methods We sampled 57 accessions houghtonii, daigremontiana, closely related taxa, including old herbarium materials, all over world. analysed genome size, chromosome numbers, sequenced whole genome, complete plastome sequence each accession, studied diversity ribosomal RNA genes. also performed detailed phylogenomic study using nuclear BUSCO Key Results Our reveals genetic cytogenetic morphotypes, shows that single tetraploid genotype (morphotype A) dominates populations, emerging first reported clonal capable worldwide colonisation. Morphotype A striking uniformity, high phenotypic plasticity, extremely rates vegetative reproduction, representing “general-purpose genotype”. Conclusions The astonishing reproductive capacity, adaptability speed at which colonising new regions spread highlight importance understanding hybridisation polyploidy ecosystems. findings call for need risk assessments before developing hybrids breeding may exhibit characteristics.

Language: Английский

The Winner Takes It All: a single genotype of Kalanchoe ×houghtonii is a global invader DOI Creative Commons
Joan Pere Pascual‐Díaz,

Neus Besolí,

Jordi López‐Pujol

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract Background and Aims Invasive alien plant species pose a global challenge, their impact is amplified by globalisation the accelerating pace of climate change. In mild-climate regions, drought-tolerant invasive plants showing broad environmental tolerance have competitive advantage. One example Kalanchoe × houghtonii (Crassulaceae), popularly known as “mother millions”. It hybrid resulting from interploid cross between K. daigremontiana delagoensis , both native to Madagascar. propagated an ornamental plant, has emerged invader in less than century. Four morphotypes this been identified, with different ploidy levels varying capacities. Here we aim investigate genomic variability behind invasion success . Methods We sampled 57 accessions houghtonii, daigremontiana, closely related taxa, including old herbarium materials, all over world. analysed genome size, chromosome numbers, sequenced whole genome, complete plastome sequence each accession, studied diversity ribosomal RNA genes. also performed detailed phylogenomic study using nuclear BUSCO Key Results Our reveals genetic cytogenetic morphotypes, shows that single tetraploid genotype (morphotype A) dominates populations, emerging first reported clonal capable worldwide colonisation. Morphotype A striking uniformity, high phenotypic plasticity, extremely rates vegetative reproduction, representing “general-purpose genotype”. Conclusions The astonishing reproductive capacity, adaptability speed at which colonising new regions spread highlight importance understanding hybridisation polyploidy ecosystems. findings call for need risk assessments before developing hybrids breeding may exhibit characteristics.

Language: Английский

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