Genetic diversity of barley landrace accessions (Hordeum vulgare ssp. vulgare) conserved for different lengths of time in ex situ gene banks

Article Abstract:

Conservation of genetic diversity has been studied in barley landrace accessions (Hordeum vulgare ssp. vulgare) in ex situ gene banks. Diversity was found to exist for varying lengths of time. Rejuvenation by multiplication of a sample of each accession in small field plots potentially may make for population bottlenecks and some genetic diversity may be lost or changes in gene frequencies may occur. Genetic diversity levels for the same markers in barley landraces collected recently at locations in Syria where they are still cultivated were compared to morphological and isozyme markers in gene bank accession of two landraces from Syria stored for 10, 40 and 72 years.

United Kingdom, Syria, Plant genetics, Genetic markers, Variation (Biology), Gene banks

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Direct measurement of recombination frequency in interspecific hybrids between Hordeum vulgare and H. bulbosum using genomic in situ hybridization

Article Abstract:

Recombination frequency in interspecific hybrids is discussed as seen between Hordeum vulgare and H. bulbosum with genomic in situ hybridization (GISH). It seems that high frequency of bound arms at metaphase I (MI) favors H. bulbosum chromsome retention and maintains stability of chromosome numbers in pollen mother cells (PMCs). Several recombinants have resistance to fungi and/or viruses.

New Zealand, Statistical Data Included, Statistics, In situ hybridization, Genetic recombination

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Integration of a barley (Hordeum vulgare) molecular linkage map with the position of genetic loci hosting 29 developmental mutants

Article Abstract:

Researcjh has been conducted on barley developmental mutants. The authors describe the placement of these mutants on the restriction fragment length polymorphism-amplfied fragment length polymorphism map.

Germany, Science & research, Cash grains, not elsewhere classified, Barley, Other Grain Farming, Analysis, Physiological aspects, Gene mutations, Gene mutation, Chromosome mapping, Genetic research

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