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 34 for “"Triploid"”.
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Production and Flow Cytometric Identification of Triploid Walleyes
Triploid induction experiments were conducted on fertilized walleye (Stizostedion vitreum) eggs in 1987 and 1988. Different methods and different heat-shock treatment regimes were used between years; either the water temperature, initiation time, or the duration of the heat shock were varied. In …
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Triploid induction in the South African abalone, Haliotis midae
… was undertaken to determine whether triploidy could be induced and improve the growth rate of the South African abalone, Haliotis midae. From the polar body counts at 17 °C the release times of polar body 1 and 2 were found to be at 12 - 15 min. post insemination (pi.) and 33-36 min. …
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Evaluation of Diploid and Triploid Rainbow Trout in South Dakota Ponds
<p>Triploid fish theoretically may divert energy from sexual development and reproductive behavior into somatic growth. Laboratory studies have indicated that juvenile triploids tend to be smaller, then surpass diploids after sexual maturation. The purpose of this study was to evaluate the lengths, …
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Production of Triploid Rainbow Trout for Evaluation in South Dakota Waters
… second polar body, theoretically resulting in triploid embryos. Heat shocks were at 26 and 28°c, began 10, 20, 30, or 40 min after fertilization, and lasted for 10 or 20 min for a total of 16 treatments. Another 25,000 eggs served as controls and were handled identically but at a normal water …
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A cytological study of a triploid x diploid cross of Sorghum vulgare
Call number: LD2668 .T4 1955 P75
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A cytological study of a triploid x diploid cross of Sorghum vulgare
Call number: LD2668 .T4 1955 P75
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Movement and Habitat Use by Triploid Grass Carp in the Lower Rio Grande, Texas
No abstract prepared.
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Habitat selection and movements of diploid and triploid grass carp in a large reservoir
… lake tributaries and determine if diploid and triploid fish exhibit similar behaviors. From 2017-2019, I tracked 86 Grass Carp tagged with acoustic transmitters in Truman Reservoir, Missouri to answer these questions. I employed Bayesian discrete choice models to determine winter habitat …
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The Genomic Basis of Heterosis in High-Yielding Triploid Hybrids of Willow (Salix spp.) Bioenergy Crops
… well characterized, especially in high-yielding triploid hybrids. The primary objectives of this study were 1) to evaluate diverse diploid, triploid, and tetraploid families for a suite of traits important for biomass production, 2) to identify genomic regions linked to these traits, 3) to …
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A population dynamic model assessing options for managing eastern oysters (Crassostrea virginica) and triploid Suminoe oysters (Crassostrea ariakensis) in Chesapeake Bay
… non-native species, introduction of sterile triploid oysters has been proposed. However, recent data show that a small percentage of triploid individuals progressively revert toward diploidy, introducing the possibility Suminoe oyster might establish self-sustaining populations. To assess the …
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Increased levels of ploidy in A. texanum-dependent A. platineum (JJL) populations in eastern Illinois: conservation implications for the state endangered species
… and Ambystoma laterale. A. platineum are triploid (JJL) and usually reproduce gynogenetically using one of the parental species as a sexual host. There is a population of A. platineum at Kickapoo State Recreation Area (KSRA), Vermillion County, Illinois that uses Ambystoma texanum as a …
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The biology of a population of all-female salamanders of the ambystoma jeffersonianum complex in East-Central Indiana
… southern A. jeffersonianum) and two all-female, triploid species (A. tremblayi and A. platineum). The triploid species are believed to be intermediate in range and tolerance to their diploid allies and are usually found associated with them (A. tremblayi with A. laterale and A. platineum with A. …
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Salinity Tolerance of Flowering Rush, Butomus umbellatus
… to native ecosystems. There are two cytotypes, a triploid and diploid, and multiple genotypes contained within the diploid cytotype currently established in the U.S. Despite its presence in river drainages connected to estuarine areas, documentation on the salinity tolerance of flowering rush is …
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Intercalary Regeneration in Larval Ambystoma Limbs: The Origin of Skeletal Structures and The Non-Segmental Organization of Morphogenetic Information
… in nucleolar number between diploid and triploid animals, I show that the entire intercalary regenerate is derived from the stump when wrist or tarsus blastemas are grafted to the mid-stylopodium of the fore- or hindlimb. The transplanted prospective autopodium forms no more than would be …
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Plant Characteristics and Chromosome Numbers of Four Reciprocal Crosses in Dendrobium
… Two offspring of D. schulleri x D. Sunset were triploid with 2n = ca. 57. Ten offspring of D. Sunset x D. schulleri were diploids with 2n = ca. 38.
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Survivorship of ploidy-variable unisexual <i>ambystoma</i> aalamanders across developmental stages
… individuals. In previous studies, triploid individuals are the most abundant class, suggesting a greater mortality in high-ploidy (tetraploid and pentaploid) individuals. We assessed the frequency of ploidy levels (determined by microsatellite analysis) across four life stages …
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The Effect of Grass Carp Introduction on Aquatic Vegetation and Existing Fish Populations in Two Small Prairie Lakes
Within two years after triploid grass carp introduction in 2.3 hectare Prior Lake in South Dakota, aquatic vegetation coverage and height in the water column were significantly lower (P<0.005). During the same two year period, triploid grass carp did not significantly reduce aquatic vegetation …
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Protoplast Fusion for the Production of Intermonoploid Somatic Hybrids in Cultivated Potato
… in appearance. Anther culture of SH2 yielded triploid regenerants (3x). These regenerants may be more phenotypically normal than the original somatic hybrids because of lower ploidy. Segregation of SSR alleles in the triploid anther culture regenerants provided evidence that the hexaploid …
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Morphometric discrimination among Betula nana, Betula pubescens and their hybrids using the shapeR package
… and dwarf birch is diploid, their hybrids become triploid. These hybrids can then backcross with either one of their parental species and thus transfer genes between the two species. This has resulted in a considerable amount of similar morphological characteristics between the two species, and …
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