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 23 for “"adaptive traits"”.
-
Adaptability of Soybeans to Late-Planted Environments (Isolines, Gxe, Double Cropping)
… genotype by cropping system interactions, plant traits associated with high yield in double-crop environments, and sources of breeding lines possessing these adaptive traits.
-
Maternal environment affects adaptive seed and seedling traits in Elymus elymoides
… of such seeds. Here, we ask how potentially adaptive traits of bottlebrush squirreltail (Elymus elymoides), a common restoration grass used in the Great Basin, are affected by its maternal growing environment. We grew a wild-sourced, agriculturally produced population under 6 maternal …
-
Improvement of common bean (Phaseolus vulgaris L.) for regional food systems in the northeastern United States
… United States as well as favorable agronomic traits such as yield and upright growth habit into two heirloom varieties with unique seed coat phenotypes, using a marker-assisted selection model. The four targeted diseases were common bacterial blight, caused by Xanthamonas campestris pv. …
-
Mechanisms determining the coexistence of open- and closed-canopy biomes
… select for divergent floristic assemblages and adaptive traits, from which emergent differences in resource availability and fire incidence contribute to excluding species from the alternate habitat. In this thesis, I investigated whether the coexistence of open–closed canopy biomes, such as …
-
Effects of Maternal Stress and Cortisol Treatment on Offspring Anxiety Behaviour and Stress Responses In Zebrafish (Danio rerio) and Largemouth Bass (Micropterus salmoides)
… that maternal stress may prime offspring with adaptive traits to better survive in a stressful environment.
-
Sequence capture as a tool to understand the genomic basis for adaptation in angiosperm and gymnosperm trees
… find the genetic variants that underlie complex, adaptive traits in spruce and pine, as well as poplar. Results of this research will facilitate bridging the genomic information gap between trees and other organisms. Moreover, it will provide better understanding how genetic variation governs …
-
Partitioning of multivariate phenotypes using regression trees reveals complex patterns of adaptation to climate across the range of black cottonwood (Populus trichocarpa)
… physiological, morphological, and phenological traits. Latitudinal clines for the relevant component traits are frequently observed for species that have a north-south distribution, but these relationships do not account for climatic variation within a given latitudinal band, which may be …
-
Genomics of Climatic Adaptation in Populus Trichocarapa
… natural accessions of P. trichocarpa with adaptive trait phenotyping and genome-wide genotyping to uncover relationships between genotype, phenotype, and environment. We detected strong correlations between adaptive phenotypes, climate, and geography, which suggested climatic selection …
-
Loblolly Pine Genetics Structure Its Mycorrhizal Community
… influenced by the genetic underpinnings of the traits involved. Thus, in order to understand patterns in current plant populations, and to predict future populations dynamics, an understanding of the genetic basis of adaptive traits is necessary. For example, genetic correlations between traits …
-
Vegetative Anatomy of Rhododendron with a Focus on a Comparison between Temperate and Tropical Species
… work was to explore leaf and stem anatomical traits in relation to habitat (temperate and tropical) and elevation of the native range. A closely-related group of Rhododendron was selected to reduce variation in genetic history and reveal environment–associated adaptive traits. Vessel …
-
The genetics of parallel evolution: a case study using thermal and non-thermal ecotypes of Mimulus guttatus from Yellowstone National Park
… the predictability of genetic change across adaptive events and the patterns observed during adaptive transitions across species remain poorly understood. Numerous parallel evolutionary transitions within the model plant genus Mimulus (monkeyflowers) provide a wonderful comparative context …
-
The genetics of parallel evolution: a case study using thermal and non-thermal ecotypes of Mimulus guttatus from Yellowstone National Park
… the predictability of genetic change across adaptive events and the patterns observed during adaptive transitions across species remain poorly understood. Numerous parallel evolutionary transitions within the model plant genus Mimulus (monkeyflowers) provide a wonderful comparative context …
-
Fruits and frugivory in neotropical primates and in Amazonian flooded and unflooded forests
… of this seasonal cycle was apparent in the adaptive traits observed in plants and animals, with corresponding effects upon their networks of interactions. The role of frugivore body size as an important trait in relation to the degree of frugivory within consumers was emphasised via one of …
-
Pheromones in Heliconius butterflies: Chemical ecology, genetics, and behaviour
… interest in understanding the genetic basis for adaptive traits, and pheromones provide a tractable system for such studies. I uncover the genetic basis for anti-aphrodisiac production in H. melpomene through genetic mapping and use in-vitro assays for enzymatic activity to identify a novel …
-
Genomic Selection and Genome-Wide Association Study in Populus trichocarpa and Pinus taeda
… be useful for marker-assisted selection in some traits. In this study, we first estimated heritability for several adaptive traits (cold hardiness, dbh, bud flush, height, and bud set) in a population of Populus trichocarpa and for height, diameter, and stem straightness in Pinus taeda. GEBVs …
-
The genomics of adaptive colouration in Hypolimnas butterflies and the wood tiger moth, Arctia plantaginis
… butterflies and moths are a striking example of adaptive evolution and are a tractable trait to dissect the genetic mechanisms underlying adaptations. Studies of Lepidoptera, mainly mimetic species from the tropics, have led to two general patterns. First, a limited set of genes have been re-used …
-
Morphological and Physiological Responses of Senegalia senegal (L.) Britton Provenances to Drought, Salinity, and Fertility
… and growth. This study examined physiological adaptive traits allowing Senegalia senegal to grow better in both saline and dry lands. We conducted two greenhouse experiments and one field study to characterize growth, photosynthetic capacity, water use efficiency (WUE) and gum arabic yield …
-
Intra-species genomic variations in hydrogen-oxidising bacteria is delineated by horizontal gene flow
… isolation, where reproductive barriers result in adaptive traits being shared only within the isolated population. Therefore, discontinuities in gene flow in eukaryotes generally result in the formation of an ecologically and genotypically cohesive unit. In contrast, delineating asexual bacterial …
-
Colouration evo-devo: the developmental basis of intra-specific variation in cichlid pigmentation
… role of development in the diversification of adaptive traits is not well understood. In this PhD thesis, I present a study of the development a trait exhibiting adaptive variation. Cichlid egg-spots are a well-suited model for investigating the development of diversifying traits. Evolving …
Page 1 of 2