Journal
MOLECULAR ECOLOGY
Volume 11, Issue 9, Pages 1855-1863Publisher
WILEY
DOI: 10.1046/j.1365-294X.2002.01567.x
Keywords
cold tolerance; false positives; genecology; genetic resources; molecular markers; ryegrass
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Molecular genecology is the study of geographical clines in frequencies of molecular markers and their relationship to ecological clines in environmental conditions. This study outlines the principles underlying the selection of populations, focusing on avoiding 'false positives'- noncausal correlations between allele frequency and the environment. The principles are illustrated by identifying a set of populations of Lolium perenne for the study of temperature responses. The selected set of populations encompasses a 20 degreesC range in mean January temperature. Their freezing tolerance shows a linear trend with winter temperature, LT50 decreasing by 0.25 degreesC for each 1 degreesC reduction in mean January temperature.
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