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.
Results
Showing 1 to 20 of 84 for “"Genetic improvement"”.
-
Genetic improvement of swine
… in mind. The first was the identification of genetically superior litters and the second was the evaluation of heritability estimates for various performance traits and of the genetic and phenotypic correlations between them. In order to achieve the first objective it was necessary to …
-
Genetic improvement for nitrogen utilization in maize
… (NUE) is an important target for future maize improvement. Essential to the design of an effective breeding program to select maize hybrids with enhanced NUE is an understanding of past progress, variation among maize germplasm for NUE and its component traits, and identification of phenotyping …
-
Genetic improvement of aphid resistance, protein, and elemental composition in soybean
… traits, and by evaluating the introgressed genetic region surrounding Rag2 in populations of near isogenic lines to localize quantitative trait loci (QTL) causing yield drag associated with the Rag2 gene. The populations were tested in multiple environments across three years with little or …
-
Characterization and potential for the genetic improvement of pigeonpea (cajanus cajan ) landraces
… limiting the adoption of the crop. The narrow genetic base of pigeonpea limits plant breeding efforts aimed at improving the species. Determining the genotypic variation in agronomic and nutritional attributes among pigeonpea genotypes is essential for improving crop productivity and …
-
Genetic Improvement of Switchgrass Cell Wall Content, Leaf Angle and Flowering Time
… Somatic embryogenic (SE) calli are used for genetic transformation in switchgrass. A superior switchgrass line, HR8, was developed using recurrent tissue culture selection from cv. Alamo. HR8 SE calli were genetically transformable using Agrobacterium at an efficiency of ~12%. We used HR8 …
-
The use of Cicer reticulatum L. for genetic improvement of cultivated chickpea
… was conducted to evaluate the phenotypic and genetic variations of 486 lines derived from interspecific crosses between C. arietinum (CDC Leader) and 20 accessions of C. reticulatum. Field evaluations were done on the progeny at the F4 and F5 generations. The lines were grown at four locations …
-
Use of QTL identified in breed crosses for genetic improvement in pigs
… of multiple QTL identified in breed crosses for genetic improvement of livestock were examined through marker-assisted introgression (MAI) and marker-assisted selection (MAS). Evaluation of the effectiveness of alternate strategies for MAI and MAS were carried out using stochastic computer …
-
Use of ultrasound technology in the genetic improvement of U.S. lamb composition
… estimation of carcass composition. Successful genetic evaluation of ultrasonic measures depends upon technician certification guidelines and a viable common-endpoint adjustment strategy for field data. Four technicians and three image interpreters ultrasonically evaluated 172 lambs to determine …
-
A microculture approach towards enhanced productivity and genetic improvement of pecan (Carya illinoensis)
Mature pecan nuts provide a more convenient, practical, and readily available explant source, and extend the sampling period for in vitro research on this species to a year-round basis. Axenic cultures from mature pecan embryos were established in vitro by reducing the water availability in the …
-
Index selection in terminal sire sheep: implications for genetic improvement in a crossbreeding system
… of heterogeneous environmental variances and genetics by environment interactions (GxE) on genetic evaluation. The most widely used breeds of terminal sires in the UK are Charollais, Suffolk, and Texel. These breeds participated in sire referencing schemes from the early 1990s by sharing rams …
-
Evaluation of the impact of reproductive technologies on the genetic improvement and profit of pig production systems
… to standard paternal and maternal traits on genetic improvement and profit of the enterprise. A first-in-kind derivation of the economic weight of semen traits was undertaken. Genetic gains for paternal and maternal traits were higher in the four and three-way schemes, respectively. The …
-
GENETIC IMPROVEMENT OF CAMELINA SATIVA: DEVELOPMENT OF NEW VARIETIES AND EXPLORATION OF ITS POTENTIAL AS AN INTERMEDIATE CROP
… evaluating its potential to improve the crop (improvements in yield, oil content and reduction of anti-nutritional compounds such as glucosinolates). He underlines the importance of genetic diversity and proposes two selection strategies: one that involves crossing spring varieties and the …
-
Genetic improvement of selected indigenous Cucurbitaceae species important for food and medicinal purposes in KwaZulu-Natal, South Africa
… of colchicine in inducing polyploidy (genetic improvement) in the roots and shoots of both species was established. In both species treated roots had higher tetraploid and octoploid ratios than leaves. Colchicine treatment lowered the germinability (germination percentage), induced …
-
Stand dynamics, growth, and yield of genetically enhanced loblolly pine (Pinus taeda L.)
Genetic improvement has been an integral part of loblolly pine plantation forestry in southern United States for about 60 years with focus on improving timber yield, wood quality, and pest and disease resistance. Advances in techniques of genetic selection, breeding, and propagation of planting …
-
The impact of the national bioengineered food disclosure standard and its methods of disclosure on consumer preferences for gene edited and genetically modified foods
… food produced with, or containing, certain plant genetic improvement techniques - such as genetic modification. The standard introduces the new term “Bioengineered” on the approved label, which can be disclosed through methods such as a symbol, text, QR code, and mobile text message. Advances in …
-
GENOMICS FOR WILD AND MEDICINAL PLANT DIVERSITY STUDIES
… are a fundamental asset in investigating genetic diversity, evolutionary history and adaptive potential of populations. During this doctorate, we aimed at developing genomic resources for non-model, medicinal plant species in order to facilitate research in biodiversity genomics, flower …
Page 1 of 5