Diversity in local cultivars of Pisum sativum collected from home gardens in Sweden
Abstract Although one would assume that finding any local cultivars in home gardens in a modern society such as Sweden is unlikely, such cultivars were in fact found. More than 170 seed accessions of vegetables, pulses and other seed-propagated garden crops maintained in home gardens and dating back at least to the 1950s have been assembled following the nationwide ‘Seed Call’. Of these, 32 garden pea accessions were taxonomically characterized and compared with 43 accessions already present in the gene bank. In addition to morphological descriptors, SSR and retrotransposon-based iPBS markers were applied. Based on five SSR markers, potential duplicates could be located within nine pair/gro…
Changes in the genetic diversity of barley of Nordic and Baltic origin, studied by isozyme electrophoresis
AbstractIn this study an evaluation was made of changes in the genetic variation of barley (Hordeum vulgare L.) of Nordic and Baltic origin, from the end of the 19th century until today. A comparison of Nordic and Baltic material with exotic material that has not been subjected to intense selection was also made. A total of 293 accessions, including 160 Nordic and 80 Baltic landraces, cultivars and breeding lines, and another 53 landraces of exotic origin (Central Asia), were surveyed using isozyme starch gel electrophoresis. For the four isozymes studied, 28 alleles at 11 loci were observed. The average total genetic diversity value (HT) for individual loci ranged between 0 and 0.519. In t…
Inter simple sequence repeat analysis of genetic diversity and relationships in cultivated barley of Nordic and Baltic origin
This study evaluates putative changes of genetic diversity and relationships of barley in the Nordic and Baltic countries that might have taken place during the last century as a result of commercial breeding. Four ISSR primers were used to analyse 227 accessions, yielding a total of 47 polymorphic loci. Shannon-Weaver diversity values for each locus ranged from 0.012 to 0.693. Overall, there were no significant changes of genetic diversity observed over time. A significant decrease of diversity was, however, observed in material from the southern parts of the Nordic and Baltic countries. In material from the northern parts no decrease of diversity was observed. The genetic diversity of six…