Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Landraces"”.
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Characterization and potential for the genetic improvement of pigeonpea (cajanus cajan ) landraces
… agronomic and nutritive attributes of pigeonpea landraces. The specific objectives of the study were to: (i) determine the genetic diversity in agro-morphological attributes (ii) determine the genetic diversity in selected nutritive attributes among pigeonpea landraces (iii) characterize the seed …
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Characterization and classification of Native American maize landraces from the Southwestern United States
… need to characterize and classify known existing landraces. Maize landraces and human cultures have co-evolved, with maize being shaped by diverse environmental and cultural selection pressures. Understanding maize diversity, and relationships between maize landraces can lead to insights into the …
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GENETIC DIVERSITY AND LINKAGE DISEQUILIBRIUM IN WILD SOYBEAN, LANDRACES, ANCESTRAL, AND ELITE SOYBEAN POPULATIONS
… 2) the population resulting from domestication (landraces), 3) Asian introductions from which North American cultivars were developed (ancestors), and 4) elite cultivars from the 1980's (elite). A total of 438 single nucleotide polymorphisms (SNPs) and 58 insertions-deletions were discovered …
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Characterising four Cowpea (Vigna unguiculata (L.) Walp.) Mozambican landraces deposited in a seed bank for drought tolerance
… to select for more drought-tolerant cowpea landraces. This study has been therefore conducted in a temperature-controlled greenhouse at the University of Pretoria and in an open-sided tunnel house in Mozambique. The overall aim of the research work was to identify the most drought-tolerant …
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Morpho-agronomic and genetic variation and segregation patterns of phaseolus vulgaris landraces from selected provinces of South Africa
… local communities grow a variety of P. vulgaris landraces. Landraces are significant for breeding purposes because they contain important germplasm. However, studies on variation in morphology and genetics among P. vulgaris landraces are limited in South Africa. Thus, this study aimed to …
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Variation in growth, nutrition and phytochemicals of sequentially harvested shoots and fruits, and genetic studies of Lagenaria siceraria landraces in South Africa
… and fruits; as well as genetic diversity among landraces using single nucleotide polymorphism (SNP) markers, are limited. These studies are crucial for enhancing plant physiological understanding, optimizing crop yields, improving nutritional value, and preserving genetic diversity in L. …
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Genotypic variation in water use efficiency, gaseous exchange and yield of four cassava landraces grown under rainfed conditions in South Africa
… Limpopo and Kwazulu-Natal provinces using landraces with no improved varieties available in the country. Information on the actual pattern of water extraction, water use and water use efficiency of cassava landraces grown in the dry environments of South Africa is limited. Therefore, the …
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Physiological and production evaluation of different populations of sicilian wheat landraces [Valutazione fisiologica e produttiva di diverse popolazioni di varietà locali di frumento Siciliano]
… a: (i) confrontare le prestazioni delle landraces e dei genotipi moderni, concentrandosi sulla valutazione della loro resa finale; (ii) analizzare le risposte genotipiche allo stress idrico; (iii) valutare i genotipi in condizioni alto e basso input; (iv) valutare la risposta alla resa e …
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Comparative Resistance of Maize populations to the maize weevil,Sitophilus zeamais Motschulsky
… and husk cover rating scores (p<0.001), with landraces having longer husks (mean, 88 mm) and better husk cover score ratings (mean, 1.8) than hybrids (mean, 35 mm and 3.0, for husk length and cover rating scores, respectively) and open pollinated varieties (OPVs) (mean 48 mm cover length and …
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Comparative Resistance of Maize populations to the maize weevil,Sitophilus zeamais Motschulsky
… and husk cover rating scores (p<0.001), with landraces having longer husks (mean, 88 mm) and better husk cover score ratings (mean, 1.8) than hybrids (mean, 35 mm and 3.0, for husk length and cover rating scores, respectively) and open pollinated varieties (OPVs) (mean 48 mm cover length and …
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Cassava root (Manihot Esculenta Crantz) characterisation and evaluation of process-induced changes on functional of its flour
… was conducted on two South African cassava landraces red (RCLR) and white (WCLR) highlighting their potential end-use properties. Response surface methodology (RSM) was employed in determining the linear, interactive and quadratic effect of varying concentrations of pre-treatment (0.6 – …
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An assessment of rhizobial infection, metabolite release and growth response in agriculturally important legume and cereal crops
… the impetus to embark on research using African landraces of sorghum and millet to study their interaction with rhizobia. Seven strains of root-nodule bacteria (namely Rhizobium GHR2, Bradyrhizobium japonicum Tal 110, Sinorhizobium meliloti strain 1, Rhizobium leguminosarum bv. viceae Cn6, R. …
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Archaeological seeds and local varieties of edible fruits: morphology through time
… 1) with a set of 172 accessions of melon landraces. Both molecular and morphological analyses confirmed that these archaeological seeds did not belong to a wild species, but to a cultivated melon, likely to be an intermediate form between the two melon subspecies. Reasonably, this …
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Exploring candidate genes and rhizosphere microbiome in relation to iron cycling in Andean potatoes
… microbial community diversity in Andean potato landraces to understand the role of plant-microbial interaction in potato Fe nutrient cycling. From the analysis of the high-throughput Illumina sequences of 16S and ITS region of ribosomal RNA gene, we found that both potato landraces with low and …
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Exploring variation in water use efficiency in barley (Hordeum vulgare L.) among wild and circadian mutant varieties, and its impact on responses to drought
… efficiency of a selection of wild barleys and landraces were also characterised relative to elite varieties. Stomatal anatomy was linked to gs, A and WUEi. Wild barleys and landraces sometimes produced better yield components (such as tillering) than elite varieties despite lacking targeted …
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Canada Thistle Management Systems for Sustainable and Organic Farms
… regrowth potential. Crosses between USDA landraces and the multi-stemmed accessions could lead to a sorghum cover crop and biofuel plant with great unmown biomass and height and ability to regrow following mowing.
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Bioinformatics Analysis of Whole-Exome Sequencing Data for the Identification of Nuclear and Chloroplast Diversity in Barley
… accessions, I identified two clusters of landraces, genetically distant from other landraces in our collection, one from Ethiopia and one from the Fertile crescent. Both could be useful sources alleles to study the diversity and adaptation in barley germplasm.
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Comparative genomics of repetitive elements between maize inbred lines B73 and Mo17
… HapMap2 lines, including maize wild progenitor, landraces, and improved lines, decreases and increases in abundance of additional sets of k-mers associated with centromere, 45S rDNA, knob, and retrotransposons were found among groups, revealing global evolutionary trends of genomic repeats during …
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occurrences and incidences of bana bunchy top disease in major banana growing regions of Zambia
… the level of susceptibility varied among them. Landraces showed low levels of susceptibility in comparison to the improved cultivars. Disease incidences were significantly different at P≤0.05 with average means ranging from 1-31.8%. the presence of the banana bunchy top virus vector (pentalonia …
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