Abstract:
:We compared genetic variation and population differentiation at RFLP marker loci with seven quantitative characters including fungicide resistance, temperature sensitivity, pycnidial size, pycnidial density, colony size, percentage of leaves covered by pycnidia (PLACP) and percentage of leaves covered by lesions (PLACL) in Mycosphaerella graminicola populations sampled from four regions. Wide variation in population differentiation was found across the quantitative traits assayed. Fungicide resistance, temperature sensitivity, and PLACP displayed a significantly higher Q(ST) than G(ST), consistent with selection for local adaptation, while pycnidial size, pycnidial density and colony size displayed a lower or significantly lower Q(ST) than G(ST), consistent with constraining selection. There was not a statistical difference between Q(ST) and G(ST) in PLACL. We also found a positive and significant correlation between genetic variation in molecular marker loci and quantitative traits at the multitrait scale, suggesting that estimates of overall genetic variation for quantitative traits in M. graminicola could be derived from analysis of the molecular genetic markers.
journal_name
Mol Ecoljournal_title
Molecular ecologyauthors
Zhan J,Linde CC,Jürgens T,Merz U,Steinebrunner F,McDonald BAdoi
10.1111/j.1365-294X.2005.02638.xsubject
Has Abstractpub_date
2005-08-01 00:00:00pages
2683-93issue
9eissn
0962-1083issn
1365-294Xpii
MEC2638journal_volume
14pub_type
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