Orellana Maria Renée, López-Pujol Jordi, Blanché Cèsar, Rovira Anna M, Bosch Maria
Greb, Laboratori de Botànica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028, Barcelona, Spain.
Genetica. 2009 Mar;135(2):221-32. doi: 10.1007/s10709-008-9271-9. Epub 2008 May 27.
Delphinium staphisagria is an endemic annual or biennial herb from the Mediterranean Basin, widely distributed in isolated populations of variable size. We evaluated the allozyme diversity of 31 populations along its distribution range via starch gel electrophoresis, assaying 12 enzyme systems and scoring 17 loci. The low levels of genetic variability detected (A = 11.8, A(p) = 1.6, H(o) = 0.026, H(e) = 0.057), are discussed in relation to the life-history traits of the species, such as short life-span, selfing or gravity seed dispersion. Other factors influencing genetic diversity, such as evolutionary history and spreading are also considered. Due to its historical medicinal uses, this plant has probably become widespread in the Mediterranean area. Human-mediated distribution could have promoted few migrant genotypes, recent founder events and long distance dispersal. These events would explain the genetic homogeneity found within and among populations, as well as the absence of a clear biogeographic structure. The limited genetic variability, the high genetic similarity among populations and the dysploidy of this species make it worthy of conservation. Management strategies are proposed mainly to preserve its genetic pool.
斯塔菲氏翠雀是一种原产于地中海盆地的一年生或二年生特有草本植物，广泛分布于大小不一的孤立种群中。我们通过淀粉凝胶电泳评估了其分布范围内31个种群的等位酶多样性，检测了12种酶系统并对17个基因座进行了评分。检测到的低水平遗传变异性（A = 11.8，A(p) = 1.6，H(o) = 0.026，H(e) = 0.057），结合该物种的生活史特征进行了讨论，如寿命短、自交或重力种子传播。还考虑了影响遗传多样性的其他因素，如进化历史和传播情况。由于其历史药用价值，这种植物可能在地中海地区广泛传播。人类介导的分布可能促进了少数迁移基因型、近期奠基者事件和远距离传播。这些事件可以解释种群内部和种群之间发现的遗传同质性，以及缺乏明确的生物地理结构。该物种有限的遗传变异性、种群间的高遗传相似性和非整倍性使其值得保护。主要提出了管理策略以保护其基因库。
