Variation for neutral markers is correlated with variation for quantitative traits in the plant pathogenic fungus Mycosphaerella graminicola
Variation for neutral markers is correlated with variation for quantitative traits in the plant pathogenic fungus Mycosphaerella graminicola
复制标题
DOI：
10.1111/j.1365-294x.2005.02638.x
复制
发表时间：
2005-08
影响因子：
4.9
通讯作者：
Jiasui Zhan;Celeste C. Linde;Tim Jurgens;Ueli Merz;Fabrizio Steinebrunner;Bruce A. McDonald
中科院分区：
文献类型：
--
作者：
Jiasui Zhan;Celeste C. Linde;Tim Jurgens;Ueli Merz;Fabrizio Steinebrunner;Bruce A. McDonald
在RFLP标记位点上比较了4个地区禾草分枝杆菌群体的遗传变异和群体分化，包括杀菌剂抗性、温度敏感性、孢子大小、孢子密度、菌落大小、孢子病覆盖率（PLACP）和病斑覆盖率（PLACL）等7个数量性状。不同数量性状的群体分化存在较大差异。杀菌剂抗性、温度敏感性和PLACP表现出显著高于GST的QST，与本地适应性的选择一致，而孢子大小、孢子密度和菌落大小表现出低于或显著低于GST的QST，与限制性选择一致。PLACL的QST和GST之间没有统计学差异。在多性状尺度上，分子标记位点的遗传变异与数量性状呈显著正相关，表明可以通过分子遗传标记的分析来估计小麦数量性状的总体遗传变异。
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 QST than GST, consistent with selection for local adaptation, while pycnidial size, pycnidial density and colony size displayed a lower or significantly lower QST than GST, consistent with constraining selection. There was not a statistical difference between QST and GST 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.