Effects of life history traits and sampling strategies on genetic diversity estimates obtained with RAPD markers in plants

Genetic differentiation among populations of Sesleria albicans Kit. ex Schultes (Poaceae) from ecologically different habitats in central Europe

“…In a study of the widespread Tanacetum vulgare, 85% polymorphic bands were observed (Keskitalo et al, 1998), in the rare Vicia pisiformis 7.2% (Black-Samuelsson et al, 1997) and in apomictic species of Rosa section Caninae only 3% (Werlemark and Nybom, 2001). These differences are not astonishing, since the level of genetic variability strongly depends on the plant's life history traits (Hamrick and Godt, 1990;Nybom and Bartish, 2000). S. albicans is a perennial, allogamous plant species with a very broad ecological amplitude and these biological characteristics all contribute to create and maintain the observed high level of genetic variability (Babbel and Selander, 1974;Hamrick and Godt, 1990;Ge et al, 1999;Nybom and Bartish, 2000).…”

“…These differences are not astonishing, since the level of genetic variability strongly depends on the plant's life history traits (Hamrick and Godt, 1990;Nybom and Bartish, 2000). S. albicans is a perennial, allogamous plant species with a very broad ecological amplitude and these biological characteristics all contribute to create and maintain the observed high level of genetic variability (Babbel and Selander, 1974;Hamrick and Godt, 1990;Ge et al, 1999;Nybom and Bartish, 2000). Considering the intrapopulational genetic diversity of S. albicans, our study revealed a strong correlation of genetic variability and population size, as demonstrated for many other species (Frankham, 1996;Godt et al, 1996;Fischer and Matthies, 1998;Menges and Dolan, 1998).…”

Genetic differentiation and diversity analysis of medicinal tree Syzygium cumini (Myrtaceae) from ecologically different regions of India

“…DNA based markers are popular tools for examining the extent and distribution of the different aspects of genetic diversity in a species. Recently, two meta-analyses showed that diversity surveys made with dominant markers provide comparable data to surveys undertaken with codominant markers (Nybom and Bartish, 2000;Nybom, 2004). To date, no universal marker system is available for codominant markers, which is applicable to every species.…”

Faible différenciation génétique, à partir d'amplification aléatoire d'ADN polymorphe (RAPD), entre les types de pin sylvestre (Pinus sylvestrisL.) d'altitude et de plaine dans les Alpes à climat continental

“…II). Malgré huit marqueurs monomorphes, tous les individus ont pu être distingués à l'aide des 30 fragments polymorphes, ce qui confirme le pouvoir de résolution attribué aux marqueurs RAPD [40]. Les fréquences des marqueurs polymorphes varient de 0,23 à 0,99. .…”

“…La dispersion des semences ne peut compenser que partiellement cette tendance car la grande majorité des semences de conifères dispersées par le vent atteint le sol dans les premières centaines de mètres [35]. Dans les Carpates, un isolement phé-nologique presque total a été mesuré entre des populations sé-parées par une différence d'élévation de 400 m [40]. À Brigue, l'exposition nord du peuplement de plaine opposée à l'exposition sud du peuplement d'altitude (Tab.…”