P. G. Lanham

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The phylogenetic relationships of all seven known species of Cecidophyopsis mites (Acari: Eriophyidae) with Ribes hosts have been inferred from ribosomal DNA sequences. This analysis found groups of closely related mites. The five gall-forming species, four of which are monophagous and one which has two hosts, were found in two groups. Another group(More)
Seventy-two accessions, representing 22 species from sections Arachis, Erectoides, Extranervosae, and Triseminalae of the genus Arachis, were screened for seed storage protein polymorphism. Variation was detected between sections, between genome types, between species, and in some cases between different accessions of the same species or different seeds of(More)
The development of easily scoreable genetic markers in Arachis will facilitate the introgression of desirable traits from wild species into adapted germplasm. We have used random amplified polymorphic DNAs (RAPDs) to identify polymorphic molecular markers in a range of wild and cultivated Arachis species. From a total of sixty 10-mer oligonucleotide(More)
 Redcurrant, Ribes rubrum L., germplasm was screened for molecular polymorphism using anchored microsatellite primers in polymerase chain reactions (PCRs). Eighty markers were detected using only three primers and 16 redcurrant genotypes were fingerprinted using these markers. The genetic relatedness of these genotypes, as determined by the anchored(More)
A method is described for the identification of conserved genes in one plant species by using sequence information on internal motifs from well-characterized clones from another species. This sequence information is used to design primers for reverse transcriptase polymerase chain reaction (RT-PCR) and to design oligonucleotide probes to identify genuine(More)
Ribes nigrum germplasm was screened for random amplified polymorphic DNA (RAPD) markers. Fiftyfour markers were identified which generated individual fingerprints for each of 21 cultivars. Genetic variation within R. nigrum germplasm, as detected by RAPDs, demonstrated that the genetic basis for improvement of blackcurrant is narrower than would be expected(More)
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