Premium
Influence of cryptic population structure on observed mating patterns in the wild progenitor of maize ( Zea mays ssp. parviglumis )
Author(s) -
HUFFORD MATTHEW B.,
GEPTS PAUL,
ROSSIBARRA JEFFREY
Publication year - 2011
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1111/j.1365-294x.2010.04924.x
Subject(s) - outcrossing , biology , mating system , gene flow , biological dispersal , inbreeding , population , pollen , mating , evolutionary biology , effective population size , ecology , genetics , genetic variation , gene , demography , sociology
Indirect two‐generation analysis of pollen flow has proven to be an effective alternative to exhaustive paternity analysis in numerous plant populations. In this investigation, the method is extended to an annual wild maize species, Zea mays ssp. parviglumis ( Poaceae ). Our analysis of mating system in parviglumis revealed high levels of outcrossing and higher biparental inbreeding than typically observed in grasses. Pollen dispersal analysis suggested low levels of long‐distance dispersal. Given previous evidence for intrapopulation genetic structure in parviglumis populations, we explored the impact of cryptic population structure on estimates of mating system and pollen flow. Subpopulations inferred through spatially explicit Bayesian assignment showed markedly different values for both mating system parameters and pollen flow than the entire population. Finally, a novel method of pollen haplotype assignment revealed nonrandom mating consistent with intrapopulation structure. These results indicate parviglumis could be particularly susceptible to habitat fragmentation currently occurring throughout Mexico due to recent changes in land use.