TY - JOUR
T1 - A comparison of patterns of genetic structure in two co-occurring Agave species (Asparagaceae) that differ in the patchiness of their geographical distributions and cultivation histories
AU - Lindsay, Denise L.
AU - Swift, Joel F.
AU - Lance, Richard F.
AU - Edwards, Christine E.
N1 - Funding Information:
The authors thank G.Ferguson,Y.Sapir,C.Palma-Silva and an anonymous reviewer for comments on a previous version of this manuscript. We also acknowledge P. Bailey, G. Ferguson, M. G. Jung, A. J. Hollingsworth, J. L. Anderson, B. L. Escalon, J. H. Lindsay, S. Stone, and G. Clark for assistance with specimen collection and laboratory work.This research was funded through the U.S. Army Environmental Quality Technology Program by the U.S. Army Engineer Research and Development Center. Permission was granted by the Chief of Engineers to publish this information. The views expressed in this manuscript are those of the authors and do not reflect the official policy or position of the Department of the Army, Department of Defense or the U.S. Government. The use of trade, product or firm names in this paper is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Publisher Copyright:
© 2018 The Linnean Society of London.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - Spatial genetic structure in plants can be affected by continuity of geographical distribution, cultivation history, pollination and seed dispersal mechanisms. Here, we examined the relative effects of these factors on the genetic structure of Agave palmeri and A. parryi, which share similar pollination syndromes and seed dispersal mechanisms but differ in the continuity of their distributions and cultivation history. Agave parryi has a patchy distribution and was cultivated by Native Americans, whereas A. palmeri has a more continuous distribution and no documented history of cultivation. We sampled populations of each species in their North American ranges, genotyped individuals with microsatellite loci and analysed patterns of genetic structure. No genetic structuring was detected in A. palmeri, but A. parryi formed three distinct genetic clusters, corresponding to geographical locations. One genetic cluster of A. parryi contained populations from lower elevations and had lower levels of genetic diversity, probably indicating anthropogenic origins. We conclude that continuity of distribution, pollinators and cultivation history all may affect patterns of genetic connectivity.
AB - Spatial genetic structure in plants can be affected by continuity of geographical distribution, cultivation history, pollination and seed dispersal mechanisms. Here, we examined the relative effects of these factors on the genetic structure of Agave palmeri and A. parryi, which share similar pollination syndromes and seed dispersal mechanisms but differ in the continuity of their distributions and cultivation history. Agave parryi has a patchy distribution and was cultivated by Native Americans, whereas A. palmeri has a more continuous distribution and no documented history of cultivation. We sampled populations of each species in their North American ranges, genotyped individuals with microsatellite loci and analysed patterns of genetic structure. No genetic structuring was detected in A. palmeri, but A. parryi formed three distinct genetic clusters, corresponding to geographical locations. One genetic cluster of A. parryi contained populations from lower elevations and had lower levels of genetic diversity, probably indicating anthropogenic origins. We conclude that continuity of distribution, pollinators and cultivation history all may affect patterns of genetic connectivity.
KW - Agave palmeri
KW - Agave parryi
KW - Anthropogenic origin
KW - Genetic diversity
KW - Microsatellites
KW - Pollinator
KW - Sky islands
KW - Species distributions
UR - http://www.scopus.com/inward/record.url?scp=85043310651&partnerID=8YFLogxK
U2 - 10.1093/botlinnean/box099
DO - 10.1093/botlinnean/box099
M3 - Article
AN - SCOPUS:85043310651
SN - 0024-4074
VL - 186
SP - 361
EP - 373
JO - Botanical Journal of the Linnean Society
JF - Botanical Journal of the Linnean Society
IS - 3
ER -