Mahy G, Vekemans X, Jacquemart A L, DE Sloover J R
Unité d'Ecologie et de Biogéographie, Université catholique de Louvain, Place Croix du Sud 5, B-1348 Louvain-la-Neuve, Belgium.
Laboratoire de Génétique et d'Ecologie Végétales, Université Libre de Bruxelles, Chausée de Wavre 1850, B-1160 Bruxelles, Belgium.
New Phytol. 1997 Oct;137(2):325-334. doi: 10.1046/j.1469-8137.1997.00811.x.
Genetic diversity, population genetic structure and gene flow in Calluna vulgaris (L.) Hull were assessed by means of seven allozyme loci scored in 18 populations from the South-Western area of the species' range. Genetic diversity was lower (H = 0.20) than reported for long-lived widespread species but was characterized by a high number of alleles per locus (5.60 at the species level) of which more than 70% were rare. More than 95% of genetic variation was found at the intrapopulation level (G = 0.047). High levels of past gene flow were inferred, based on the allozyme data (N = 5.2 from G . N = 10.2 from the 'private allele' method). Calluna vulgaris exhibited several geographic patterns of genetic variation. Both cluster analysis, constructed with various genetic distances and principal components analysis showed that Spanish and Pyrenean populations were clearly different from those collected in the Massif Central and Belgium. Also, a trend for decreasing genetic diversity towards Northern populations was detected. These patterns might be related to the post-glacial history of Calluna. In addition, it is shown that isolation by distance has played a role in the geographic shaping of genetic variation in this species.
通过对该物种分布范围西南地区18个种群的7个等位酶位点进行评分，评估了普通石南（Calluna vulgaris (L.) Hull）的遗传多样性、种群遗传结构和基因流。遗传多样性（H = 0.20）低于报道的长寿广布物种，但每个位点的等位基因数量较多（物种水平为5.60个），其中70%以上为稀有等位基因。超过95%的遗传变异存在于种群内水平（G = 0.047）。基于等位酶数据推断过去基因流水平较高（G方法得出N = 5.2，“私有等位基因”方法得出N = 10.2）。普通石南表现出几种遗传变异的地理模式。用各种遗传距离构建的聚类分析和主成分分析均表明，西班牙和比利牛斯山脉的种群与在中央高原和比利时采集的种群明显不同。此外，还检测到向北方种群遗传多样性降低的趋势。这些模式可能与普通石南的冰后期历史有关。此外，研究表明距离隔离在该物种遗传变异的地理塑造中发挥了作用。
