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Article
Genetic Differentiation in Oryza meridionalis Ng based on Molecular and Crossability Analyses
Molecular and hybridization studies were carried out to detect variation patterns in O. meridionalis. A total of 119 polymorphic RAPD markers were produced from 12 10-mer operon primers while 67 alleles were d...
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Article
The taxonomic status of the wild rice species Oryza ridleyi Hook. f. and O. longiglumis Jansen (Ser. Ridleyanae Sharma et Shastry) from Southeast Asia
The taxonomic status of the two species O. ridleyi and O. longiglumis in Oryza series Ridleyanae was resolved using morphological and molecular markers. Cluster analysis using a similarity matrix based on 12 qual...
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Article
Genetic basis for co-adaptive gene complexes in rice (Oryza sativa L.) landraces
One hundred and twenty-two AFLP markers were mapped using an IR64 × Azucena rice doubled-haploid (DH) population. The distribution of these mapped markers was monitored across a set of 48 diverse landraces of ...
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Article
Taxonomic status of Oryza glumaepatula Steud. III. Assessment of genomic affinity among AA genome species from the New World, Asia, and Australia
In order to assess affinity of the AA genome in different wild Oryza species from Asia, Australia, and South America, chromosome pairing was analyzed at metaphase-I of the F1 hybrids obtained from interspecific c...
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Article
Taxonomic status of Oryza glumaepatula Steud. II. Hybridization between New World diploids and AA genome species from Asia and Australia
Intraspecific and interspecific crosses were made using O. glumaepatula Steud., O. rufipogon Griff., O. nivara Sharma et Shastry, O. meridionalis Ng, and other diploid accessions from the New World to determin...
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Article
Conservation of rice genetic resources: the role of the International Rice Genebank at IRRI
Rice genetic resources, comprising landrace varieties, modern and obsolete varieties, genetic stocks, breeding lines, and the wild rices, are the basis of world food security. The International Rice Genebank a...
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Article
Contrasting genetic diversity relationships are revealed in rice (Oryza sativa L.) using different marker types
Genetic variation between samples of Oryza sativa from 19 localities in Bangladesh and Bhutan was assessed using two PCR-based molecular marker systems: RAPD (random amplification of polymorphic DNA) and ISSR-...
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Article
Hybridization of AA genome rice species from Asia and Australia I. Crosses and development of hybrids
Interspecific and intraspecific crosses of rice species were made involving the AA genome wild species Oryza meridionalis Ng from Australia, O. nivara Sharma et Shastry, O. rufipogon Griff, the weedy type O. s...
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Article
Hybridization of AA genome rice species from Asia and Australia II. Meiotic analysis of Oryza meridionalis and its hybrids
To determine the genomic constitution of Oryza meridionalis Ng (2n=2x=24) and to estimate genomic affinity between Asian and Australian wild species of rice containing the AA genomes, chromosome pairing was an...
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Chapter
Conservation of rice genetic resources: the role of the International Rice Genebank at IRRI
Rice genetic resources, comprising landrace varieties, modern and obsolete varieties, genetic stocks, breeding lines, and the wild rices, are the basis of world food security. The International Rice Genebank a...
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Article
Predicting quantitative variation within rice germplasm using molecular markers
Diverse Asian rice (Oryza sativa) germplasm has been used to identify associations between various quantitative traits and RAPD molecular markers using multiple regression analysis. This has allowed us to predict...
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Article
Protecting the heritage of rice biodiversity
The development of improved rice varieties depends upon access to the genetic resources of rice. These are represented by the thousands of locally adapted varieties that farmers have grown for generations, and...
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Article
Use of RAPD for the study of diversity within plant germplasm collections
As part of the development of a molecular toolkit for the study of diversity within large plant germplasm collections, RAPD technology has been applied to accessions of rice (Oryza sativa) obtained from the major...
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Article
Honorary Life Members named
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Article
Abstracts of papers presented at the 63rd annual PAA meeting
