Speciation by genome duplication: Repeated origins and genomic composition of the recently formed allopolyploid species Mimulus peregrinus.
Speciation by genome duplication: Repeated origins and genomic composition of the recently formed allopolyploid species Mimulus peregrinus.
复制标题
DOI：
10.1111/evo.12678
复制
发表时间：
2015-06
期刊：
影响因子：
--
通讯作者：
Puzey JR
中科院分区：
文献类型：
--
作者：
Vallejo-Marín M;Buggs RJA;Cooley AM;Puzey JR
全基因组复制（多倍化）是一种“瞬时”物种形成机制，在植物进化史上发挥了重要作用。我们对多倍体早期进化的了解大部分是基于对一些最近形成的物种的研究。最近在苏格兰大陆发现了一种新的多倍体杂种（异源多倍体）物种 Mimulus peregrinus，形成于过去 140 年之内，并通过染色体计数得到证实。在这里，通过对 1200 个基因区域进行有针对性的深度测序，我们确认了这个新物种的亲本起源于 M. x robertsii，M. x robertsii 是两种引入物种 M. guttatus 和 M. uteus 之间的不育三倍体杂交种，在英国已归化并广泛分布。我们还报告了奥克尼群岛上的 M. peregrinus 新种群，并证明苏格兰大陆和奥克尼群岛上的种群是通过当地 M. x robertsii 种群的基因组复制而独立产生的。我们的数据表明，一些等位基因可能已经在进化的游隼基因组中丢失。最近通过异源多倍化产生的生态模式酸浆属新物种为探索自然进化谱系中杂交和基因组复制的早期阶段提供了有力的机会。
Whole genome duplication (polyploidization) is a mechanism of “instantaneous” species formation that has played a major role in the evolutionary history of plants. Much of what we know about the early evolution of polyploids is based upon studies of a handful of recently formed species. A new polyploid hybrid (allopolyploid) species Mimulus peregrinus, formed within the last 140 years, was recently discovered on the Scottish mainland and corroborated by chromosome counts. Here, using targeted, high‐depth sequencing of 1200 genic regions, we confirm the parental origins of this new species from M. x robertsii, a sterile triploid hybrid between the two introduced species M. guttatus and M. luteus that are naturalized and widespread in the United Kingdom. We also report a new population of M. peregrinus on the Orkney Islands and demonstrate that populations on the Scottish mainland and Orkney Islands arose independently via genome duplication from local populations of M. x robertsii. Our data raise the possibility that some alleles are already being lost in the evolving M. peregrinus genomes. The recent origins of a new species of the ecological model genus Mimulus via allopolyploidization provide a powerful opportunity to explore the early stages of hybridization and genome duplication in naturally evolved lineages.
登录
查看更多内容
DOI：
10.3120/0024-9637-59.1.29
发表时间：
2012-01-01
期刊：
Madrono
影响因子：
--
作者：
Benedict, Beverly G.;Modliszewski, Jennifer L.;Willis, John H.
通讯作者：
Willis, John H.
影响因子：
3.8
作者：
Buggs, R. J. A.;Doust, A. N.;Soltis, D. E.
通讯作者：
Soltis, D. E.
影响因子：
10.7
作者：
Baumel, A;Ainouche, M;Schulman, AH
通讯作者：
Schulman, AH
影响因子：
4.2
作者：
Cooley, A. M.;Carvallo, G.;Willis, J. H.
通讯作者：
Willis, J. H.
影响因子：
3
作者：
Buggs, Richard J. A.;Renny-Byfield, Simon;Soltis, Douglas E.
通讯作者：
Soltis, Douglas E.