Genetic variability of an unusual apomictic triploid cactus - Haageocereus tenuis Ritter - From the Coast of Central Peru

Mónica Arakaki, Pablo Speranza, Pamela S. Soltis, Douglas E. Soltis

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Haageocereus tenuis is a prostrate cactus restricted to a small area of 2 km2 near the city of Lima, Peru. The species is triploid and propagates mainly through stem fragmentation. In addition, propagation via agamospermy is documented and adventitious embryony is also inferred as a mechanism. Although seedling recruitment has not been observed in nature, we have shown that asexually produced seeds are viable. About 45 adult individuals, plus 9 individuals obtained from seeds, were sampled and 5 microsatellite markers were used to assess genetic variability. Microsatellite analysis confirms that individuals from the only existing population are genetically identical and that the population likely represents a single clone. The absence of mutations in any individual, even in highly variable microsatellite loci, may indicate that the species is also of recent origin. Other prostrate species of Haageocereus are suspected to be occasional apomicts. This phenomenon has significant implications for the evolutionary biology and ecology of Haageocereus and other clonal Cactaceae. © 2012 The American Genetic Association. All rights reserved.
Original languageAmerican English
Pages (from-to)127-133
Number of pages7
JournalJournal of Heredity
DOIs
StatePublished - 1 Jan 2013
Externally publishedYes

Fingerprint Dive into the research topics of 'Genetic variability of an unusual apomictic triploid cactus - Haageocereus tenuis Ritter - From the Coast of Central Peru'. Together they form a unique fingerprint.

  • Cite this