作者
Julie A Lee‐Yaw, Christopher J Grassa, Simon Joly, Rose L Andrew, Loren H Rieseberg
发表日期
2019/1
期刊
New Phytologist
卷号
221
期号
1
页码范围
515-526
简介
- Cytonuclear discordance is commonly observed in phylogenetic studies, yet few studies have tested whether these patterns reflect incomplete lineage sorting or organellar introgression.
- Here, we used whole‐chloroplast sequence data in combination with over 1000 nuclear single‐nucleotide polymorphisms to clarify the extent of cytonuclear discordance in wild annual sunflowers (Helianthus), and to test alternative explanations for such discordance.
- Our phylogenetic analyses indicate that cytonuclear discordance is widespread within this group, both in terms of the relationships among species and among individuals within species. Simulations of chloroplast evolution show that incomplete lineage sorting cannot explain these patterns in most cases. Instead, most of the observed discordance is better explained by cytoplasmic introgression. Molecular tests of evolution further indicate that selection may have …
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JA Lee‐Yaw, CJ Grassa, S Joly, RL Andrew… - New Phytologist, 2019