A Description and Interpretation of the NPGS Birdsfoot Trefoil Core Subset Collection

Abstract

active collection. This should increase evaluation efficiency, reduce the number of accession requests, and re-Systematic evaluations for a range of traits from accessions in duce the frequency and costs for collection regeneration National Plant Germplasm System (NPGS) core subset collections (Greene and McFerson, 1994). Well characterized collecshould assist collection management and enhance germplasm utilization. The objectives of this research were to: (i) evaluate the 48-accession tions can help plant explorers develop plans for collect-NPGS birdsfoot trefoil (Lotus corniculatus L.) core subset collection ing unique genetic materials that are not represented by by means of a variety of biochemical, morphological, and agronomic present ex situ collection holdings (Steiner and Greene, characters; (ii) determine how these characters were distributed among 1996; Greene et al., 1999a,b). the core subset accessions and associations among plant and ecogeo-

Scandinavian colonial bentgrass diversity described by RAPD, variable chlorophyll fluorescence, and collecting site ecogeography

“…The RAPD products were separated by electrophoresing 11 ml of the reaction mixture in a 17.5 gl (1 3:1 NuSieve agarose gel in 1 )/Tris-borate EDTA. The gels were run at a constant 90 mA with a 100 bp DNA ladder standard (Steiner et al, 2001a) were developed from the RAPD band polymorphisms using the Pearson correlation method and Ward's (Ward, 1963) clustering technique (Systat for the Macintosh, Evanston, IL) ( Figure 1). The number of interpretive group classes was determined by the optimal class number (c opt ) method (Steiner et al, 2001a) using:…”

Analysis of genetic diversity and morphological traits of Japanese Lotus japonicus for establishment of a core collection

“…Core collections have been developed for other leguminous plants including Trifolium pratense (Kouamé and Quesenberry 1993), Medicago truncatula (Ellwood et al 2006, Ronfort et al 2006, and L. corniculatus (Steiner et al 2001). To our knowledge, this is the first report on genetic diversity in L. japonicus based on microsatellite data and on the development of a core collection of wild L. japonicus accessions.…”

“…Moreover, Steiner et al (2001) determined how biochemical, morphological and agronomic characters were distributed among the core accessions and associations among plant and ecogeographic characters. The core collection can be used for molecular characterization to study population structure and to identify genetically diverse parents for making crosses to generate recombinant inbred lines for mapping and enhancing traits.…”

Genetic Characterization of Global Rice Germplasm for Sustainable Agriculture

“…With the strategy of comprehensive evaluation and accurate analysis of the core collection, the genetic diversity of the collection can be assessed, genetic distances among the accessions can be estimated for identification of special divergent subpopulations, genetic gaps of the existing collection can be identified for planning acquisition strategies and joint analysis of phenotype and genotype can be conducted for molecular understanding of the collection (Steiner et al, 2001). These analyses can help users effectively find the traits in which they are interested along with molecular information.…”