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Biochemistry and molecular biology of arabinoxylan metabolism in barley / submitted by Robert Campbell Lee.Lee, Robert Campbell January 2002 (has links)
"April 2002" / Includes bibliographical references (leaves 193-211) / xi, 211 leaves : ill., plates ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 2002
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Evolution and spread of paraquat resistant barley grasses (Hordeum glaucum Steud. and H. leporinum Link) / Imam Hidayat.Hidayat, Imam January 2004 (has links)
"February 2004" / Bibliography: leaves 150-185. / xiii, 185 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / "This project was designed to investgate new resistant populations of Hordeum spp; to assess the role of gene flow in spreading resistance; to determine the fitness of resistant individuals in accelerating resistance evolution; and to identify genetic relationships between resistant and susceptible populations using DNA markers." / Thesis (Ph.D.)--University of Adelaide, School of Agriculture and Wine, Faculty of Sciences, 2005
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Exploiting Hordeum vulgare subsp. spontaneum genetic resources : diversity analysis and germplasm developmentMatus, Iv��n Ariel 19 December 2002 (has links)
Wild barley (Hordeum vulgare subsp. spontaneum) could be a source of useful
genes for improving cultivated barley. The useful genes present in Hordeum
vulgare subsp. spontaneum may be new alleles at described loci, or these may be
entirely new genes in the sense that there is limited allelic variation at these loci in
the cultivated germplasm pool. This research was directed at gene discovery in wild
barley and involved two steps: (i) characterization of diversity using genetic
markers and (ii) development and characterization of novel germplasm for gene
discovery.
Simple Sequence Repeats (SSRs) of known map location were used to survey three
representative groups of barley germplasm: a sample of crop progenitor (Hordeum
vulgare subsp. spontaneum) accessions, a group of mapping population parents,
and a group of varieties and elite breeding lines. The objectives were to determine
the informativeness and utility of SSRs in differentiating and classifying the three
sets of barley germplasm. Crop progenitors had the highest number of alleles per
SSR locus, followed by mapping population parents and elite breeding lines. The
cluster analysis indicated a high level of diversity within the crop progenitor
accessions and within the mapping population parents. It revealed a much lower
level of diversity within the elite breeding germplasm.
A set of Recombinant Chromosome Substitution Lines (RCSLs) representing
introgressions of Hordeum vulgare subsp. spontaneum genome in to a cultivated
barley background were developed using the Advanced Backcross strategy. An
accession of Hordeum vulgare subsp. spontaneum was the donor parent and the
variety "Harrington" was the recurrent parent. The RCSLs were developed via two
backcrosses to the recurrent parent followed by six generations of selfing. The
genomic architecture of the RCSLs was determined by molecular marker
fingerprinting with SSRs. The consequences of introgressions of Hordeum vulgare
subsp. spontaneum genome segments into the recurrent parent were assessed in
terms of inflorescence yield components, malting quality traits, and domestication-related
traits. Hordeum spontaneum subsp. spontaneum, despite its overall inferior
phenotype, contributed favorable alleles for some characters of agronomic
performance. In other cases, the introgressions caused a disruption of the
Harrington phenotype, a "reverse genetics" approach to gene discovery. / Graduation date: 2003
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Quantitative trait locus analysis of agronomic and malting quality traits in the Harrington x Morex barley (Hordeum vulgare L.) mapping populationMarquez-Cedillo, Luis A. 04 August 2000 (has links)
Characterization of the determinants of economically important phenotypes
showing complex inheritance should lead to more effective use of genetic
resources. This study was conducted to determine the number, genome location and
effects of QTLs determining malting quality and agronomic traits in the two North
American barley quality standards. Using a doubled haploid population of 140 lines
from the cross of Harrington x Morex, agronomic phenotype and malting quality
data sets from nine and eight environments, respectively, and a 107-marker linkage
map, QTL analyses were performed using simple interval mapping and simplified
composite interval mapping procedures. Thirty five QTLs were associated either
across environments or in individual environments, with five grain and agronomic
traits (yield, kernel plumpness, test weight, heading date and plant height).
Thirteen QTLs were associated with five malting quality traits (grain protein
percentage, soluble/total protein ratio, ��-amylase activity, diastatic power and malt
extract percentage). QTLs for multiple traits were coincident. The loci controlling
inflorescence type [vrsl on chromosome 2 (2H) and int-c on chromosome 4 (4H)]
were coincident with QTLs affecting all traits except heading date and malt extract
percentage. The largest effect QTLs -for yield, kernel plumpness test weight, plant
height grain protein percentage, S/T ratio, and diastatic power- were coincident
with the vrsl locus. QTL analyses were conducted separately for each sub-population
(six-rowed and two-rowed). Ten new QTLs were detected in the sub-populations.
There were significant interactions between the vrsl and int-c loci for
plant height, grain protein percentage, and SIT protein ratio. Positive transgressive
segregants were found for all agronomic traits. They were more prevalent in the
six-rowed sub-population, indicating that more favorable alleles were fixed in the
two-rowed parent. Results suggest that this mating of two parents representing
different germplasm groups caused a disruption in the balance of traits involved in
malting quality, which resulted in no progeny carrying all favorable alleles and
therefore surpassing the quality of either parent. This study describes some of the
genetic determinants of agronomic and malting quality traits in a two-rowed x six-rowed
cross and it is a first step toward the further characterization and
manipulation of these determinants. / Graduation date: 2001
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Effects of selection, recombination and plot type on phenotypic and quantitative trait locus analyses in barley (Hordeum vulgare L.)Iyamabo, Odianosen E. 20 December 1993 (has links)
Graduation date: 1994
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Quantitative trait locus mapping of yield and yield components in barley (Hordeum vulgare L.)Traore, Abdoulaye 23 December 1993 (has links)
Higher grain yield is a key objective in barley (Hordeum vulgare. L) breeding.
Despite extensive research on the genetics of yield and its components, selection for
yield per se is still the most extensively employed because of negative relationships
among components, modest correlations between yield and any particular component,
and the additional resources required for measuring the components. The development
of quantitative trait locus (QTL) detection procedures allows for an alternative
approach to this issue. The objective of this investigation was to determine the
biological basis of observed grain yield QTLs, with particular reference to yield
components and yield-related traits. Yield and yield component traits were assessed in
a population of spring barley doubled haploids from a cross of 'Steptoe' x 'Morex'.
The scope of inference of the experiment was broadened by using reference QTL data
sets from the multiple environment assessment of the same population. Both positive
and negative relationships among yield, component, and related trait QTLs were
observed. The QTL data indicate that indirect selection for yield via yield
components would be ineffective. The yield QTL effects in this germplasm were
largely attributable to lodging and basal internode length. Localization and
interpretation of yield QTLs may be useful for studying orthologous gene expression
in other germplasm and in developing multiple character selection strategies. / Graduation date: 1994
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Genetics of partial incompatibility and improvement of haploid production in Hordeum vulgare L. x H. bulbosum L. crossesChen, Fu-chiang, Chen, Fuqiang 29 March 1991 (has links)
The production of barley (Hordeum vulgare L.) haploids by crossing with
H. bulbosum is a widely used tool in breeding and genetics. Certain barley
genotypes have low seed set in this interspecific cross, a phenomenon known
as partial incompatibility. Haploid production efficiency and gamete sampling
are important issues with the bulbosum technique, particularly when partially
incompatible genotypes are used. An in vitro floret culture system was
developed that substantially increases haploid production efficiency by
optimizing caryopsis growth, haploid embryo development, and plant
regeneration. The individual and combined effects of three plant growth
regulators (2,4-D, GA₃ and kinetin) on haploid production efficiency and its
determinants were compared in the floret culture system. 2,4-D alone was
superior to GA₃ alone in haploid production efficiency. 2,4-D alone or kinetin +
2,4-D are recommended for the purpose of haploid production in floret culture
using the bulbosum method.
Partial incompatibility between H. vulgare and H. bulbosum was studied
by doubled haploid progeny analysis. Two different loci were hypothesized to
account for the inheritance of partial incompatibility in the crosses of Vada x
Klages, Harrington x Klages, and Vada x Harrington. The partial incompatibility
gene in Harrington was found to be recessive. The dominant nature of the
partial incompatibility gene (Inc) in Vada was confirmed. An association
between the (Inc) gene and a deficiency in a stigma/stylodium-specific high pl
protein was found in the cosegregation analysis of doubled haploid progeny.
The Inc gene may be linked to the gene coding for the stigma/stylodium-specific
protein, or the Inc gene may regulate expression of the protein-encoding
locus. Segregation analysis of Mendelian markers in doubled haploid
progeny showed that there is no evidence that the partial incompatibility status
of the parents has an effect on gamete sampling by the bulbosum technique. / Graduation date: 1991
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Chromosome pairing and the isolation of "2-chromosome, double interchanges" in barley, Hordeum vulgare L.Fastnaught, Christine Elizabeth January 1980 (has links)
No description available.
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The effect of leaf area reduction on water use of barley (Hordeum vulgare L.)Minyard, Jerry Hal, 1949- January 1973 (has links)
No description available.
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The influence of induced mutation on the adaptation of barley cultivarsAbdul Ghafoor Arain January 1973 (has links)
1 v. (various pagings) : ill. ; 26 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Agronomy, 1973
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