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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Journal article

Evaluation and characterization of plum genetic resources in Sweden and Latvia  [2002]

Kaufmane, E.; Ikase, L.; Trajkovski, V.; Lacis, G.;

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Department of Horticultural Plant Breeding (Balsgard), Sweden, and Dobele Horticultural Plant Breeding Experimental Station (HPBES), Latvia hold wide and valuable fruit crop genetic resources collections, including 192 (Balsgard) and 141 (Dobele) accessions of plums, which are used in research and breeding. The constitution of plum genetic resources core collections in Sweden and Latvia, which are safety collections for each other, was very important for the future preservation and sustainable usage of genetic resources. 18 morphological, phenological and fruit quality traits of 207 plum varieties and 99 superior selections derived from P. domestica, P. cerasifera, P. salicina (including ssp. ussuriensis), P. simonii, P. americana, P. spinosa and P. brigantiaca, constituting the plum Genetic Resources (GR) collections in Sweden and Latvia, were evaluated using principal component analysis (PCA). Principal component analysis showed discernible phenotypical aggregation in both germplasm collections. Accessions formed quite distinguishable groups, according to crop type: domestic plums, gages, yellow egg plums and prunes, diploid plums, Eurasia plums, and plums with another ploidity. These morphologically different groups were used as the source for creation of a core collection for plums, to be duplicated in both countries. PCA was also used to identify the most useful characters for germplasm grouping.

From the journal

Acta horticulturae

ISSN : 0567-7572