A molecular re-examination of speciation in the intertidal red alga Mastocarpus stellatus (Gigartinales, Rhodophyta) in Europe
A molecular re-examination of speciation in the intertidal red alga Mastocarpus stellatus (Gigartinales, Rhodophyta) in Europe
复制标题
对欧洲潮间带红藻 Mastocarpus stellatus（Gigartinales，Rhodophyta）物种形成的分子重新检查
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Guiry
中科院分区：
文献类型：
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作者：
G. Zuccarello;N. Schidlo;L. Mcivor;M. Guiry
Mastocarpus stellatus 是北大西洋常见的潮间带红藻。之前的研究表明，该物种在东北大西洋至少分为两个繁殖群体，一个北部群体（西班牙和葡萄牙不存在）和一个南部群体，它们几乎完全不育。它还表明，在实验室培养中，该物种至少有两种明显的生活史（有性生活史和“直接”生活史）。这些生活史的分布似乎呈南北分布。我们使用分子标记来证实这些结果并扩大了某些人群的抽样范围。细胞器标记显示，育种群体具有不同的质体和线粒体单倍型，并且似乎沿南北梯度分布。正如先前的文化研究所示，英格兰南部和法国北部（布列塔尼）的种群混合了北部和南部的繁殖群体，除了拉德杜布雷斯特之外。结果还表明，大多数无性植物具有与北方育种群相对应的质体单倍型和与南方育种群相对应的线粒体单倍型，这可能是细胞器差异遗传和无性生活史杂交形成的情况。这些使用分子标记的结果支持了之前的结论，并再次强调了布列塔尼海藻的高水平遗传变异。
Mastocarpus stellatus is a common intertidal red alga in the north Atlantic. Previous work showed that the species was divided into at least two breeding groups in the northeastern Atlantic, a northern one (absent in Spain and Portugal) and a southern one, which were almost completely inter-sterile. It also showed that, in laboratory culture, at least two types of life history were evident in this species (a sexual one and a ‘direct’ one). The distribution of these life histories appeared to have a north–south distribution. We have used molecular markers to confirm these results and expand the sampling in certain populations. Organellar markers showed that the breeding groups have different plastid and mitochondria haplotypes and appear to be distributed along a north–south gradient. Populations in southern England and northern France (Brittany) have mixed northern and southern breeding groups, except for the Rade du Brest, as was shown previously from culture studies. Results also show that most asexual plants have a plastid haplotype corresponding to the northern breeding group and a mitochondrial haplotype corresponding to the southern breeding group, a possible case of differential organellar inheritance and hybrid formation of an asexual life history. These results using molecular markers support previous conclusions and again emphasize the high levels of genetic variation in marine algae in Brittany.
影响因子：
3.3
作者：
Alan R. Templeton;K. Crandall;C. Sing
通讯作者：
Alan R. Templeton;K. Crandall;C. Sing