Premium
PATTERNS OF GENETIC ARCHITECTURE FOR LIFE‐HISTORY TRAITS AND MOLECULAR MARKERS IN A SUBDIVIDED SPECIES
Author(s) -
Morgan Kendall K.,
Hicks Justin,
Spitze Ken,
Latta Leigh,
Pfrender Michael E.,
Weaver Casse S.,
Ottone Marco,
Lynch Michael
Publication year - 2001
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.0014-3820.2001.tb00825.x
Subject(s) - biology , genetic architecture , evolutionary biology , life history theory , life history , ecology , genetics , phenotype , gene
Understanding the utility and limitations of molecular markers for predicting the evolutionary potential of natural populations is important for both evolutionary and conservation genetics. To address this issue, the distribution of genetic variation for quantitative traits and molecular markers is estimated within and among 14 permanent lake populations of Daphnia pulicaria representing two regional groups from Oregon. Estimates of population subdivision for molecular and quantitative traits are concordant, with Q ST generally exceeding G ST . There is no evidence that microsatellites loci are less informative about subdivision for quantitative traits than are allozyme loci. Character‐specific comparison of Q ST and G ST support divergent selection pressures among populations for the majority of life‐history traits in both coast and mountain regions. The level of within‐population variation for molecular markers is uninformative as to the genetic variation maintained for quantitative traits. In D. pulicaria , regional differences in the frequency of sex may contribute to variation in the maintenance of expressed within‐population quantitative‐genetic variation without substantially impacting diversity at the genic level. These data are compared to an identical dataset for 17 populations of the temporary‐pond species, D. pulex .