Isozyme variation in Spanish natural populations of Elytrigia pungens (Pers.) Tutin and E. repens (L.) Nevski

Abstract

Genetic variability in 20 natural populations of the species Elytrigia repens (L.) Nevski and Elytrigia pungens (Pers.) Tutin collected at different geographical places in Spain has been analysed using eight isozyme systems. Analysis of the isoenzymatic patterns indicates inter-and intrapopulational variability in all of the isozyme systems except LAP. The data of intrapopulational variability level, calculated in each population, did not show significant differences in either species. The factorial analysis of correspondence showed a specific distribution of the populations into two groups, based on a series of discriminatory isoenzymatic bands that belonged to different systems and whose relative importance is discussed. The dendrogram obtained with the UPGMA method established a specific distribution for the populational subgroups within each species grouping, and showed a lower level of interpopulational variability in E. repens than in E. pungens. Our results suggest a significant relationship between isozyme variability and several geographical variables (latitude, longitude and altitude).

Genetic diversity in wild Spanish populations of Thinopyrum junceum and Thinopyrum junceiforme using endosperm proteins and PCR-based markers

“…Due to their importance as a source of genes for breeding cultivated species (B othmer and S alomon 1994), international organizations and seed banks are keen to collect and preserve wild species. Their use in plant improvement is greatly favored if their genetic variability (S oler et al 1993; G arcía et al 2002) and the taxonomical relationships among them (B othmer and S alomon 1994) are known.…”

Studying allozyme variation in sexual and apomictic Taraxacum and Pilosella (Asteraceae) populations

“…In Secale, the activity of four basic phosphatases as well as several minor phosphatases was found [44]. In Elytrigia pumgens and E. repens, eight to ten phosphatase activity bands were detected [46]. In our material, ACP was encoded by nine loci in P. officinarum and by ten loci encoding the monomeric enzyme from, in T. officinale.…”

Analysis of the genetic diversity of wild, Spanish populations of the speciesElymus caninus(L.) Linnaeus andElymus hispanicus(Boiss.) Talavera by PCR-based markers and endosperm proteins

“…Owing to the importance of wild species as a source of genes for breeding cultivated species, international organizations and seed banks are very interested in their collection and conservation. The effective use of wild species in plant improvement is greatly favored if their genetic variability [24] and the taxonomical relationships between them is known.…”